File: features2.rs

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//! Tests for the new feature resolver.

use std::fs::File;

use cargo_test_support::cross_compile::{self, alternate};
use cargo_test_support::paths;
use cargo_test_support::prelude::*;
use cargo_test_support::publish::validate_crate_contents;
use cargo_test_support::registry::{Dependency, Package};
use cargo_test_support::str;
use cargo_test_support::{basic_manifest, cargo_process, project, rustc_host, Project};

/// Switches Cargo.toml to use `resolver = "2"`.
pub fn switch_to_resolver_2(p: &Project) {
    let mut manifest = p.read_file("Cargo.toml");
    if manifest.contains("resolver =") {
        panic!("did not expect manifest to already contain a resolver setting");
    }
    if let Some(index) = manifest.find("[workspace]\n") {
        manifest.insert_str(index + 12, "resolver = \"2\"\n");
    } else if let Some(index) = manifest.find("[package]\n") {
        manifest.insert_str(index + 10, "resolver = \"2\"\n");
    } else {
        panic!("expected [package] or [workspace] in manifest");
    }
    p.change_file("Cargo.toml", &manifest);
}

#[cargo_test]
fn inactivate_targets() {
    // Basic test of `itarget`. A shared dependency where an inactive [target]
    // changes the features.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .file(
            "src/lib.rs",
            r#"
            #[cfg(feature = "f1")]
            compile_error!("f1 should not activate");
            "#,
        )
        .publish();

    Package::new("bar", "1.0.0")
        .add_dep(
            Dependency::new("common", "1.0")
                .target("cfg(whatever)")
                .enable_features(&["f1"]),
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2015"

            [dependencies]
            common = "1.0"
            bar = "1.0"
            "#,
        )
        .file("src/lib.rs", "")
        .build();

    p.cargo("check")
        .with_status(101)
        .with_stderr_data(
            str![[r#"
...
[ERROR] f1 should not activate
...
"#]]
            .unordered(),
        )
        .run();

    switch_to_resolver_2(&p);
    p.cargo("check").run();
}

#[cargo_test]
fn inactive_target_optional() {
    // Activating optional [target] dependencies for inactivate target.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .feature("f2", &[])
        .feature("f3", &[])
        .feature("f4", &[])
        .file(
            "src/lib.rs",
            r#"
            pub fn f() {
                if cfg!(feature="f1") { println!("f1"); }
                if cfg!(feature="f2") { println!("f2"); }
                if cfg!(feature="f3") { println!("f3"); }
                if cfg!(feature="f4") { println!("f4"); }
            }
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [dependencies]
            common = "1.0"

            [target.'cfg(whatever)'.dependencies]
            dep1 = {path='dep1', optional=true}
            dep2 = {path='dep2', optional=true, features=["f3"]}
            common = {version="1.0", optional=true, features=["f4"]}

            [features]
            foo1 = ["dep1/f2"]
            foo2 = ["dep2"]
            "#,
        )
        .file(
            "src/main.rs",
            r#"
            fn main() {
                if cfg!(feature="foo1") { println!("foo1"); }
                if cfg!(feature="foo2") { println!("foo2"); }
                if cfg!(feature="dep1") { println!("dep1"); }
                if cfg!(feature="dep2") { println!("dep2"); }
                if cfg!(feature="common") { println!("common"); }
                common::f();
            }
            "#,
        )
        .file(
            "dep1/Cargo.toml",
            r#"
            [package]
            name = "dep1"
            version = "0.1.0"
            edition = "2015"

            [dependencies]
            common = {version="1.0", features=["f1"]}

            [features]
            f2 = ["common/f2"]
            "#,
        )
        .file(
            "dep1/src/lib.rs",
            r#"compile_error!("dep1 should not build");"#,
        )
        .file(
            "dep2/Cargo.toml",
            r#"
            [package]
            name = "dep2"
            version = "0.1.0"
            edition = "2015"

            [dependencies]
            common = "1.0"

            [features]
            f3 = ["common/f3"]
            "#,
        )
        .file(
            "dep2/src/lib.rs",
            r#"compile_error!("dep2 should not build");"#,
        )
        .build();

    p.cargo("run --all-features")
        .with_stdout_data(str![[r#"
foo1
foo2
dep1
dep2
common
f1
f2
f3
f4

"#]])
        .run();
    p.cargo("run --features dep1")
        .with_stdout_data(str![[r#"
dep1
f1

"#]])
        .run();
    p.cargo("run --features foo1")
        .with_stdout_data(str![[r#"
foo1
dep1
f1
f2

"#]])
        .run();
    p.cargo("run --features dep2")
        .with_stdout_data(str![[r#"
dep2
f3

"#]])
        .run();
    p.cargo("run --features common")
        .with_stdout_data(str![[r#"
common
f4

"#]])
        .run();

    switch_to_resolver_2(&p);
    p.cargo("run --all-features")
        .with_stdout_data(str![[r#"
foo1
foo2
dep1
dep2
common

"#]])
        .run();
    p.cargo("run --features dep1")
        .with_stdout_data(str![[r#"
dep1

"#]])
        .run();
    p.cargo("run --features foo1")
        .with_stdout_data(str![[r#"
foo1

"#]])
        .run();
    p.cargo("run --features dep2")
        .with_stdout_data(str![[r#"
dep2

"#]])
        .run();
    p.cargo("run --features common")
        .with_stdout_data(str![[r#"
common

"#]])
        .run();
}

#[cargo_test]
fn itarget_proc_macro() {
    // itarget inside a proc-macro while cross-compiling
    if cross_compile::disabled() {
        return;
    }
    Package::new("hostdep", "1.0.0").publish();
    Package::new("pm", "1.0.0")
        .proc_macro(true)
        .target_dep("hostdep", "1.0", rustc_host())
        .file("src/lib.rs", "extern crate hostdep;")
        .publish();
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2015"

            [dependencies]
            pm = "1.0"
            "#,
        )
        .file("src/lib.rs", "")
        .build();

    // Old behavior
    p.cargo("check").run();
    p.cargo("check --target").arg(alternate()).run();

    // New behavior
    switch_to_resolver_2(&p);
    p.cargo("check").run();
    p.cargo("check --target").arg(alternate()).run();
    // For good measure, just make sure things don't break.
    p.cargo("check --target").arg(alternate()).run();
}

#[cargo_test]
fn decouple_host_deps() {
    // Basic test for `host_dep` decouple.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .file(
            "src/lib.rs",
            r#"
            #[cfg(feature = "f1")]
            pub fn foo() {}
            #[cfg(not(feature = "f1"))]
            pub fn bar() {}
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [build-dependencies]
            common = {version="1.0", features=["f1"]}

            [dependencies]
            common = "1.0"
            "#,
        )
        .file(
            "build.rs",
            r#"
            use common::foo;
            fn main() {}
            "#,
        )
        .file("src/lib.rs", "use common::bar;")
        .build();

    p.cargo("check")
        .with_status(101)
        .with_stderr_data(str![[r#"
...
error[E0432]: unresolved import `common::bar`
...
"#]])
        .run();

    switch_to_resolver_2(&p);
    p.cargo("check").run();
}

#[cargo_test]
fn decouple_host_deps_nested() {
    // `host_dep` decouple of transitive dependencies.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .file(
            "src/lib.rs",
            r#"
            #[cfg(feature = "f1")]
            pub fn foo() {}
            #[cfg(not(feature = "f1"))]
            pub fn bar() {}
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [build-dependencies]
            bdep = {path="bdep"}

            [dependencies]
            common = "1.0"
            "#,
        )
        .file(
            "build.rs",
            r#"
            use bdep::foo;
            fn main() {}
            "#,
        )
        .file("src/lib.rs", "use common::bar;")
        .file(
            "bdep/Cargo.toml",
            r#"
            [package]
            name = "bdep"
            version = "0.1.0"
            edition = "2018"

            [dependencies]
            common = {version="1.0", features=["f1"]}
            "#,
        )
        .file("bdep/src/lib.rs", "pub use common::foo;")
        .build();

    p.cargo("check")
        .with_status(101)
        .with_stderr_data(str![[r#"
...
error[E0432]: unresolved import `common::bar`
...
"#]])
        .run();

    switch_to_resolver_2(&p);
    p.cargo("check").run();
}

#[cargo_test]
fn decouple_dev_deps() {
    // Basic test for `dev_dep` decouple.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .feature("f2", &[])
        .file(
            "src/lib.rs",
            r#"
            // const ensures it uses the correct dependency at *build time*
            // compared to *link time*.
            #[cfg(all(feature="f1", not(feature="f2")))]
            pub const X: u32 = 1;

            #[cfg(all(feature="f1", feature="f2"))]
            pub const X: u32 = 3;

            pub fn foo() -> u32 {
                let mut res = 0;
                if cfg!(feature = "f1") {
                    res |= 1;
                }
                if cfg!(feature = "f2") {
                    res |= 2;
                }
                res
            }
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [dependencies]
            common = {version="1.0", features=["f1"]}

            [dev-dependencies]
            common = {version="1.0", features=["f2"]}
            "#,
        )
        .file(
            "src/main.rs",
            r#"
            fn main() {
                let expected: u32 = std::env::args().skip(1).next().unwrap().parse().unwrap();
                assert_eq!(foo::foo(), expected);
                assert_eq!(foo::build_time(), expected);
                assert_eq!(common::foo(), expected);
                assert_eq!(common::X, expected);
            }

            #[test]
            fn test_bin() {
                assert_eq!(foo::foo(), 3);
                assert_eq!(common::foo(), 3);
                assert_eq!(common::X, 3);
                assert_eq!(foo::build_time(), 3);
            }
            "#,
        )
        .file(
            "src/lib.rs",
            r#"
            pub fn foo() -> u32 {
                common::foo()
            }

            pub fn build_time() -> u32 {
                common::X
            }

            #[test]
            fn test_lib() {
                assert_eq!(foo(), 3);
                assert_eq!(common::foo(), 3);
                assert_eq!(common::X, 3);
            }
            "#,
        )
        .file(
            "tests/t1.rs",
            r#"
            #[test]
            fn test_t1() {
                assert_eq!(foo::foo(), 3);
                assert_eq!(common::foo(), 3);
                assert_eq!(common::X, 3);
                assert_eq!(foo::build_time(), 3);
            }

            #[test]
            fn test_main() {
                // Features are unified for main when run with `cargo test`,
                // even with the new resolver.
                let s = std::process::Command::new("target/debug/foo")
                    .arg("3")
                    .status().unwrap();
                assert!(s.success());
            }
            "#,
        )
        .build();

    // Old behavior
    p.cargo("run 3").run();
    p.cargo("test").run();

    // New behavior
    switch_to_resolver_2(&p);
    p.cargo("run 1").run();
    p.cargo("test").run();
}

#[cargo_test]
fn build_script_runtime_features() {
    // Check that the CARGO_FEATURE_* environment variable is set correctly.
    //
    // This has a common dependency between build/normal/dev-deps, and it
    // queries which features it was built with in different circumstances.
    Package::new("common", "1.0.0")
        .feature("normal", &[])
        .feature("dev", &[])
        .feature("build", &[])
        .file(
            "build.rs",
            r#"
            fn is_set(name: &str) -> bool {
                std::env::var(name) == Ok("1".to_string())
            }

            fn main() {
                let mut res = 0;
                if is_set("CARGO_FEATURE_NORMAL") {
                    res |= 1;
                }
                if is_set("CARGO_FEATURE_DEV") {
                    res |= 2;
                }
                if is_set("CARGO_FEATURE_BUILD") {
                    res |= 4;
                }
                println!("cargo::rustc-cfg=RunCustomBuild=\"{}\"", res);

                let mut res = 0;
                if cfg!(feature = "normal") {
                    res |= 1;
                }
                if cfg!(feature = "dev") {
                    res |= 2;
                }
                if cfg!(feature = "build") {
                    res |= 4;
                }
                println!("cargo::rustc-cfg=CustomBuild=\"{}\"", res);
            }
            "#,
        )
        .file(
            "src/lib.rs",
            r#"
            pub fn foo() -> u32 {
                let mut res = 0;
                if cfg!(feature = "normal") {
                    res |= 1;
                }
                if cfg!(feature = "dev") {
                    res |= 2;
                }
                if cfg!(feature = "build") {
                    res |= 4;
                }
                res
            }

            pub fn build_time() -> u32 {
                #[cfg(RunCustomBuild="1")] return 1;
                #[cfg(RunCustomBuild="3")] return 3;
                #[cfg(RunCustomBuild="4")] return 4;
                #[cfg(RunCustomBuild="5")] return 5;
                #[cfg(RunCustomBuild="7")] return 7;
            }
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [build-dependencies]
            common = {version="1.0", features=["build"]}

            [dependencies]
            common = {version="1.0", features=["normal"]}

            [dev-dependencies]
            common = {version="1.0", features=["dev"]}
            "#,
        )
        .file(
            "build.rs",
            r#"
            fn main() {
                assert_eq!(common::foo(), common::build_time());
                println!("cargo::rustc-cfg=from_build=\"{}\"", common::foo());
            }
            "#,
        )
        .file(
            "src/lib.rs",
            r#"
            pub fn foo() -> u32 {
                common::foo()
            }

            pub fn build_time() -> u32 {
                common::build_time()
            }

            #[test]
            fn test_lib() {
                assert_eq!(common::foo(), common::build_time());
                assert_eq!(common::foo(),
                    std::env::var("CARGO_FEATURE_EXPECT").unwrap().parse().unwrap());
            }
            "#,
        )
        .file(
            "src/main.rs",
            r#"
            fn main() {
                assert_eq!(common::foo(), common::build_time());
                assert_eq!(common::foo(),
                    std::env::var("CARGO_FEATURE_EXPECT").unwrap().parse().unwrap());
            }

            #[test]
            fn test_bin() {
                assert_eq!(common::foo(), common::build_time());
                assert_eq!(common::foo(),
                    std::env::var("CARGO_FEATURE_EXPECT").unwrap().parse().unwrap());
            }
            "#,
        )
        .file(
            "tests/t1.rs",
            r#"
            #[test]
            fn test_t1() {
                assert_eq!(common::foo(), common::build_time());
                assert_eq!(common::foo(),
                    std::env::var("CARGO_FEATURE_EXPECT").unwrap().parse().unwrap());
            }

            #[test]
            fn test_main() {
                // Features are unified for main when run with `cargo test`,
                // even with the new resolver.
                let s = std::process::Command::new("target/debug/foo")
                    .status().unwrap();
                assert!(s.success());
            }
            "#,
        )
        .build();

    // Old way, unifies all 3.
    p.cargo("run").env("CARGO_FEATURE_EXPECT", "7").run();
    p.cargo("test").env("CARGO_FEATURE_EXPECT", "7").run();

    // New behavior.
    switch_to_resolver_2(&p);

    // normal + build unify
    p.cargo("run").env("CARGO_FEATURE_EXPECT", "1").run();

    // dev_deps are still unified with `cargo test`
    p.cargo("test").env("CARGO_FEATURE_EXPECT", "3").run();
}

#[cargo_test]
fn cyclical_dev_dep() {
    // Check how a cyclical dev-dependency will work.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [features]
            dev = []

            [dev-dependencies]
            foo = { path = '.', features = ["dev"] }
            "#,
        )
        .file(
            "src/lib.rs",
            r#"
            pub fn assert_dev(enabled: bool) {
                assert_eq!(enabled, cfg!(feature="dev"));
            }

            #[test]
            fn test_in_lib() {
                assert_dev(true);
            }
            "#,
        )
        .file(
            "src/main.rs",
            r#"
            fn main() {
                let expected: bool = std::env::args().skip(1).next().unwrap().parse().unwrap();
                foo::assert_dev(expected);
            }
            "#,
        )
        .file(
            "tests/t1.rs",
            r#"
            #[test]
            fn integration_links() {
                foo::assert_dev(true);
                // The lib linked with main.rs will also be unified.
                let s = std::process::Command::new("target/debug/foo")
                    .arg("true")
                    .status().unwrap();
                assert!(s.success());
            }
            "#,
        )
        .build();

    // Old way unifies features.
    p.cargo("run true").run();
    // dev feature should always be enabled in tests.
    p.cargo("test").run();

    // New behavior.
    switch_to_resolver_2(&p);
    // Should decouple main.
    p.cargo("run false").run();

    // And this should be no different.
    p.cargo("test").run();
}

#[cargo_test]
fn all_feature_opts() {
    // All feature options at once.
    Package::new("common", "1.0.0")
        .feature("normal", &[])
        .feature("build", &[])
        .feature("dev", &[])
        .feature("itarget", &[])
        .file(
            "src/lib.rs",
            r#"
            pub fn feats() -> u32 {
                let mut res = 0;
                if cfg!(feature="normal") { res |= 1; }
                if cfg!(feature="build") { res |= 2; }
                if cfg!(feature="dev") { res |= 4; }
                if cfg!(feature="itarget") { res |= 8; }
                res
            }
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [dependencies]
            common = {version = "1.0", features=["normal"]}

            [dev-dependencies]
            common = {version = "1.0", features=["dev"]}

            [build-dependencies]
            common = {version = "1.0", features=["build"]}

            [target.'cfg(whatever)'.dependencies]
            common = {version = "1.0", features=["itarget"]}
            "#,
        )
        .file(
            "src/main.rs",
            r#"
            fn main() {
                expect();
            }

            fn expect() {
                let expected: u32 = std::env::var("EXPECTED_FEATS").unwrap().parse().unwrap();
                assert_eq!(expected, common::feats());
            }

            #[test]
            fn from_test() {
                expect();
            }
            "#,
        )
        .build();

    p.cargo("run").env("EXPECTED_FEATS", "15").run();
    p.cargo("test").env("EXPECTED_FEATS", "15").run();

    // New behavior.
    switch_to_resolver_2(&p);
    // Only normal feature.
    p.cargo("run").env("EXPECTED_FEATS", "1").run();

    // only normal+dev
    p.cargo("test").env("EXPECTED_FEATS", "5").run();
}

#[cargo_test]
fn required_features_host_dep() {
    // Check that required-features handles build-dependencies correctly.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2018"

            [[bin]]
            name = "x"
            required-features = ["bdep/f1"]

            [build-dependencies]
            bdep = {path="bdep"}
            "#,
        )
        .file("build.rs", "fn main() {}")
        .file(
            "src/bin/x.rs",
            r#"
            fn main() {}
            "#,
        )
        .file(
            "bdep/Cargo.toml",
            r#"
            [package]
            name = "bdep"
            version = "0.1.0"
            edition = "2015"

            [features]
            f1 = []
            "#,
        )
        .file("bdep/src/lib.rs", "")
        .build();

    p.cargo("run")
        .with_status(101)
        .with_stderr_data(str![[r#"
[LOCKING] 1 package to latest compatible version
[ERROR] target `x` in package `foo` requires the features: `bdep/f1`
Consider enabling them by passing, e.g., `--features="bdep/f1"`

"#]])
        .run();

    // New behavior.
    switch_to_resolver_2(&p);
    p.cargo("run --features bdep/f1").run();
}

#[cargo_test]
fn disabled_shared_host_dep() {
    // Check for situation where an optional dep of a shared dep is enabled in
    // a normal dependency, but disabled in an optional one. The unit tree is:
    // foo
    // ├── foo build.rs
    // |   └── common (BUILD dependency, NO FEATURES)
    // └── common (Normal dependency, default features)
    //     └── somedep
    Package::new("somedep", "1.0.0")
        .file(
            "src/lib.rs",
            r#"
            pub fn f() { println!("hello from somedep"); }
            "#,
        )
        .publish();
    Package::new("common", "1.0.0")
        .feature("default", &["somedep"])
        .add_dep(Dependency::new("somedep", "1.0").optional(true))
        .file(
            "src/lib.rs",
            r#"
            pub fn check_somedep() -> bool {
                #[cfg(feature="somedep")]
                {
                    extern crate somedep;
                    somedep::f();
                    true
                }
                #[cfg(not(feature="somedep"))]
                {
                    println!("no somedep");
                    false
                }
            }
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "1.0.0"
            edition = "2018"
            resolver = "2"

            [dependencies]
            common = "1.0"

            [build-dependencies]
            common = {version = "1.0", default-features = false}
            "#,
        )
        .file(
            "src/main.rs",
            "fn main() { assert!(common::check_somedep()); }",
        )
        .file(
            "build.rs",
            "fn main() { assert!(!common::check_somedep()); }",
        )
        .build();

    p.cargo("run -v")
        .with_stdout_data(str![[r#"
hello from somedep

"#]])
        .run();
}

#[cargo_test]
fn required_features_inactive_dep() {
    // required-features with an inactivated dep.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2015"
            resolver = "2"

            [target.'cfg(whatever)'.dependencies]
            bar = {path="bar"}

            [[bin]]
            name = "foo"
            required-features = ["feat1"]

            [features]
            feat1 = []
            "#,
        )
        .file("src/main.rs", "fn main() {}")
        .file("bar/Cargo.toml", &basic_manifest("bar", "0.1.0"))
        .file("bar/src/lib.rs", "")
        .build();

    p.cargo("check")
        .with_stderr_data(str![[r#"
[LOCKING] 1 package to latest compatible version
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();

    p.cargo("check --features=feat1")
        .with_stderr_data(str![[r#"
[CHECKING] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
}

#[cargo_test]
fn decouple_proc_macro() {
    // proc macro features are not shared
    Package::new("common", "1.0.0")
        .feature("somefeat", &[])
        .file(
            "src/lib.rs",
            r#"
            pub const fn foo() -> bool { cfg!(feature="somefeat") }
            #[cfg(feature="somefeat")]
            pub const FEAT_ONLY_CONST: bool = true;
            "#,
        )
        .publish();
    Package::new("pm", "1.0.0")
        .proc_macro(true)
        .feature_dep("common", "1.0", &["somefeat"])
        .file(
            "src/lib.rs",
            r#"
            extern crate proc_macro;
            extern crate common;
            #[proc_macro]
            pub fn foo(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
                assert!(common::foo());
                "".parse().unwrap()
            }
            "#,
        )
        .publish();
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "1.0.0"
            edition = "2018"

            [dependencies]
            pm = "1.0"
            common = "1.0"
            "#,
        )
        .file(
            "src/lib.rs",
            r#"
            //! Test with docs.
            //!
            //! ```rust
            //! pm::foo!{}
            //! fn main() {
            //!   let expected = std::env::var_os("TEST_EXPECTS_ENABLED").is_some();
            //!   assert_eq!(expected, common::foo(), "common is wrong");
            //! }
            //! ```
            "#,
        )
        .file(
            "src/main.rs",
            r#"
            pm::foo!{}
            fn main() {
                println!("it is {}", common::foo());
            }
            "#,
        )
        .build();

    p.cargo("run")
        .env("TEST_EXPECTS_ENABLED", "1")
        .with_stdout_data(str![[r#"
it is true

"#]])
        .run();
    // Make sure the test is fallible.
    p.cargo("test --doc")
        .with_status(101)
        .with_stdout_data("...\n[..]common is wrong[..]\n...")
        .run();
    p.cargo("test --doc").env("TEST_EXPECTS_ENABLED", "1").run();
    p.cargo("doc").run();
    assert!(p
        .build_dir()
        .join("doc/common/constant.FEAT_ONLY_CONST.html")
        .exists());
    // cargo doc should clean in-between runs, but it doesn't, and leaves stale files.
    // https://github.com/rust-lang/cargo/issues/6783 (same for removed items)
    p.build_dir().join("doc").rm_rf();

    // New behavior.
    switch_to_resolver_2(&p);
    p.cargo("run")
        .with_stdout_data(str![[r#"
it is false

"#]])
        .run();

    p.cargo("test --doc").run();
    p.cargo("doc").run();
    assert!(!p
        .build_dir()
        .join("doc/common/constant.FEAT_ONLY_CONST.html")
        .exists());
}

#[cargo_test]
fn proc_macro_ws() {
    // Checks for bug with proc-macro in a workspace with dependency (shouldn't panic).
    //
    // Note, debuginfo is explicitly requested here to preserve the intent of this non-regression
    // test: that will disable the debuginfo build dependencies optimization. Otherwise, it would
    // initially trigger when the crates are built independently, but rebuild them with debuginfo
    // when it sees the shared build/runtime dependency when checking the complete workspace.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [workspace]
            members = ["foo", "pm"]
            resolver = "2"

            [profile.dev.build-override]
            debug = true
            "#,
        )
        .file(
            "foo/Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2015"

            [features]
            feat1 = []
            "#,
        )
        .file("foo/src/lib.rs", "")
        .file(
            "pm/Cargo.toml",
            r#"
            [package]
            name = "pm"
            version = "0.1.0"
            edition = "2015"

            [lib]
            proc-macro = true

            [dependencies]
            foo = { path = "../foo", features=["feat1"] }
            "#,
        )
        .file("pm/src/lib.rs", "")
        .build();

    p.cargo("check -p pm -v")
        .with_stderr_data(str![[r#"
...
[RUNNING] `rustc --crate-name foo [..]--cfg[..]feat1[..]`
...
"#]])
        .run();
    // This may be surprising that `foo` doesn't get built separately. It is
    // because pm might have other units (binaries, tests, etc.), and so the
    // feature resolver must assume that normal deps get unified with it. This
    // is related to the bigger issue where the features selected in a
    // workspace depend on which packages are selected.
    p.cargo("check --workspace -v")
        .with_stderr_data(str![[r#"
[FRESH] foo v0.1.0 ([ROOT]/foo/foo)
[FRESH] pm v0.1.0 ([ROOT]/foo/pm)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
    // Selecting just foo will build without unification.
    p.cargo("check -p foo -v")
        // Make sure `foo` is built without feat1
        .with_stderr_line_without(
            &["[RUNNING] `rustc --crate-name foo --edition=2015"],
            &["--cfg[..]feat1"],
        )
        .run();
}

#[cargo_test]
fn has_dev_dep_for_test() {
    // Check for a bug where the decision on whether or not "dev dependencies"
    // should be used did not consider `check --profile=test`.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2015"

            [dev-dependencies]
            dep = { path = 'dep', features = ['f1'] }
            "#,
        )
        .file(
            "src/lib.rs",
            r#"
            #[test]
            fn t1() {
                dep::f();
            }
            "#,
        )
        .file(
            "dep/Cargo.toml",
            r#"
            [package]
            name = "dep"
            version = "0.1.0"
            edition = "2015"

            [features]
            f1 = []
            "#,
        )
        .file(
            "dep/src/lib.rs",
            r#"
            #[cfg(feature = "f1")]
            pub fn f() {}
            "#,
        )
        .build();

    p.cargo("check -v")
        .with_stderr_data(str![[r#"
[LOCKING] 1 package to latest compatible version
[CHECKING] foo v0.1.0 ([ROOT]/foo)
[RUNNING] `rustc --crate-name foo [..]`
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
    p.cargo("check -v --profile=test")
        .with_stderr_data(str![[r#"
[CHECKING] dep v0.1.0 ([ROOT]/foo/dep)
[RUNNING] `rustc --crate-name dep [..]`
[CHECKING] foo v0.1.0 ([ROOT]/foo)
[RUNNING] `rustc --crate-name foo [..]`
[FINISHED] `test` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();

    // New resolver should not be any different.
    switch_to_resolver_2(&p);
    p.cargo("check -v --profile=test")
        .with_stderr_data(str![[r#"
[FRESH] dep v0.1.0 ([ROOT]/foo/dep)
[FRESH] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `test` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
}

#[cargo_test]
fn build_dep_activated() {
    // Build dependencies always match the host for [target.*.build-dependencies].
    if cross_compile::disabled() {
        return;
    }
    Package::new("somedep", "1.0.0")
        .file("src/lib.rs", "")
        .publish();
    Package::new("targetdep", "1.0.0").publish();
    Package::new("hostdep", "1.0.0")
        // Check that "for_host" is sticky.
        .target_dep("somedep", "1.0", rustc_host())
        .feature("feat1", &[])
        .file(
            "src/lib.rs",
            r#"
            extern crate somedep;

            #[cfg(not(feature="feat1"))]
            compile_error!{"feat1 missing"}
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            &format!(
                r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2015"

                # This should never be selected.
                [target.'{}'.build-dependencies]
                targetdep = "1.0"

                [target.'{}'.build-dependencies]
                hostdep = {{version="1.0", features=["feat1"]}}
                "#,
                alternate(),
                rustc_host()
            ),
        )
        .file("src/lib.rs", "")
        .file("build.rs", "fn main() {}")
        .build();

    p.cargo("check").run();
    p.cargo("check --target").arg(alternate()).run();

    // New behavior.
    switch_to_resolver_2(&p);
    p.cargo("check").run();
    p.cargo("check --target").arg(alternate()).run();
}

#[cargo_test]
fn resolver_bad_setting() {
    // Unknown setting in `resolver`
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2015"
            resolver = "foo"
            "#,
        )
        .file("src/lib.rs", "")
        .build();

    p.cargo("check")
        .with_status(101)
        .with_stderr_data(str![[r#"
[ERROR] failed to parse manifest at `[ROOT]/foo/Cargo.toml`

Caused by:
  `resolver` setting `foo` is not valid, valid options are "1" or "2"

"#]])
        .run();
}

#[cargo_test]
fn resolver_original() {
    // resolver="1" uses old unification behavior.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .file(
            "src/lib.rs",
            r#"
            #[cfg(feature = "f1")]
            compile_error!("f1 should not activate");
            "#,
        )
        .publish();

    Package::new("bar", "1.0.0")
        .add_dep(
            Dependency::new("common", "1.0")
                .target("cfg(whatever)")
                .enable_features(&["f1"]),
        )
        .publish();

    let manifest = |resolver| {
        format!(
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2015"
                resolver = "{}"

                [dependencies]
                common = "1.0"
                bar = "1.0"
            "#,
            resolver
        )
    };

    let p = project()
        .file("Cargo.toml", &manifest("1"))
        .file("src/lib.rs", "")
        .build();

    p.cargo("check")
        .with_status(101)
        .with_stderr_data(
            str![[r#"
...
[ERROR] f1 should not activate
...
"#]]
            .unordered(),
        )
        .run();

    p.change_file("Cargo.toml", &manifest("2"));

    p.cargo("check").run();
}

#[cargo_test]
fn resolver_not_both() {
    // Can't specify resolver in both workspace and package.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [workspace]
            resolver = "2"
            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2015"
            resolver = "2"
            "#,
        )
        .file("src/lib.rs", "")
        .build();

    p.cargo("check")
        .with_status(101)
        .with_stderr_data(str![[r#"
[ERROR] failed to parse manifest at `[ROOT]/foo/Cargo.toml`

Caused by:
  cannot specify `resolver` field in both `[workspace]` and `[package]`

"#]])
        .run();
}

#[cargo_test]
fn resolver_ws_member() {
    // Can't specify `resolver` in a ws member.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [workspace]
            members = ["a"]
            "#,
        )
        .file(
            "a/Cargo.toml",
            r#"
            [package]
            name = "a"
            version = "0.1.0"
            edition = "2015"
            resolver = "2"
            "#,
        )
        .file("a/src/lib.rs", "")
        .build();

    p.cargo("check")
        .with_stderr_data(str![[r#"
[WARNING] resolver for the non root package will be ignored, specify resolver at the workspace root:
package:   [ROOT]/foo/a/Cargo.toml
workspace: [ROOT]/foo/Cargo.toml
[CHECKING] a v0.1.0 ([ROOT]/foo/a)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
}

#[cargo_test]
fn edition_2021_workspace_member() {
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [workspace]
            members = ["a"]
            "#,
        )
        .file(
            "a/Cargo.toml",
            r#"
            [package]
            name = "a"
            version = "0.1.0"
            edition = "2021"
            "#,
        )
        .file("a/src/lib.rs", "")
        .build();

    p.cargo("check").with_stderr_data(str![[r#"
[WARNING] virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[NOTE] to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[NOTE] to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[NOTE] for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[CHECKING] a v0.1.0 ([ROOT]/foo/a)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]]).run();
}

#[cargo_test]
fn resolver_ws_root_and_member() {
    // Check when specified in both ws root and member.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [workspace]
            members = ["a"]
            resolver = "2"
            "#,
        )
        .file(
            "a/Cargo.toml",
            r#"
            [package]
            name = "a"
            version = "0.1.0"
            edition = "2015"
            resolver = "2"
            "#,
        )
        .file("a/src/lib.rs", "")
        .build();

    // Ignores if they are the same.
    p.cargo("check")
        .with_stderr_data(str![[r#"
[CHECKING] a v0.1.0 ([ROOT]/foo/a)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
}

#[cargo_test]
fn resolver_enables_new_features() {
    // resolver="2" enables all the things.
    Package::new("common", "1.0.0")
        .feature("normal", &[])
        .feature("build", &[])
        .feature("dev", &[])
        .feature("itarget", &[])
        .file(
            "src/lib.rs",
            r#"
            pub fn feats() -> u32 {
                let mut res = 0;
                if cfg!(feature="normal") { res |= 1; }
                if cfg!(feature="build") { res |= 2; }
                if cfg!(feature="dev") { res |= 4; }
                if cfg!(feature="itarget") { res |= 8; }
                res
            }
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [workspace]
            members = ["a", "b"]
            resolver = "2"
            "#,
        )
        .file(
            "a/Cargo.toml",
            r#"
            [package]
            name = "a"
            version = "0.1.0"
            edition = "2018"

            [dependencies]
            common = {version = "1.0", features=["normal"]}

            [dev-dependencies]
            common = {version = "1.0", features=["dev"]}

            [build-dependencies]
            common = {version = "1.0", features=["build"]}

            [target.'cfg(whatever)'.dependencies]
            common = {version = "1.0", features=["itarget"]}
            "#,
        )
        .file(
            "a/src/main.rs",
            r#"
            fn main() {
                expect();
            }

            fn expect() {
                let expected: u32 = std::env::var("EXPECTED_FEATS").unwrap().parse().unwrap();
                assert_eq!(expected, common::feats());
            }

            #[test]
            fn from_test() {
                expect();
            }
            "#,
        )
        .file(
            "b/Cargo.toml",
            r#"
            [package]
            name = "b"
            version = "0.1.0"
            edition = "2015"

            [features]
            ping = []
            "#,
        )
        .file(
            "b/src/main.rs",
            r#"
            fn main() {
                if cfg!(feature="ping") {
                    println!("pong");
                }
            }
            "#,
        )
        .build();

    // Only normal.
    p.cargo("run --bin a")
        .env("EXPECTED_FEATS", "1")
        .with_stderr_data(str![[r#"
[UPDATING] `dummy-registry` index
[LOCKING] 1 package to latest compatible version
[DOWNLOADING] crates ...
[DOWNLOADED] common v1.0.0 (registry `dummy-registry`)
[COMPILING] common v1.0.0
[COMPILING] a v0.1.0 ([ROOT]/foo/a)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
[RUNNING] `target/debug/a[EXE]`

"#]])
        .run();

    // only normal+dev
    p.cargo("test").cwd("a").env("EXPECTED_FEATS", "5").run();

    // Can specify features of packages from a different directory.
    p.cargo("run -p b --features=ping")
        .cwd("a")
        .with_stdout_data(str![[r#"
pong

"#]])
        .run();
}

#[cargo_test]
fn install_resolve_behavior() {
    // install honors the resolver behavior.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .file(
            "src/lib.rs",
            r#"
            #[cfg(feature = "f1")]
            compile_error!("f1 should not activate");
            "#,
        )
        .publish();

    Package::new("bar", "1.0.0").dep("common", "1.0").publish();

    Package::new("foo", "1.0.0")
        .file(
            "Cargo.toml",
            r#"
            [package]
            name = "foo"
            version = "1.0.0"
            edition = "2015"
            resolver = "2"

            [target.'cfg(whatever)'.dependencies]
            common = {version="1.0", features=["f1"]}

            [dependencies]
            bar = "1.0"

            "#,
        )
        .file("src/main.rs", "fn main() {}")
        .publish();

    cargo_process("install foo").run();
}

#[cargo_test]
fn package_includes_resolve_behavior() {
    // `cargo package` will inherit the correct resolve behavior.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
            [workspace]
            members = ["a"]
            resolver = "2"
            "#,
        )
        .file(
            "a/Cargo.toml",
            r#"
            [package]
            name = "a"
            version = "0.1.0"
            edition = "2015"
            authors = ["Zzz"]
            description = "foo"
            license = "MIT"
            homepage = "https://example.com/"
            "#,
        )
        .file("a/src/lib.rs", "")
        .build();

    p.cargo("package").cwd("a").run();

    let rewritten_toml = str![[r##"
# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.

[package]
edition = "2015"
name = "a"
version = "0.1.0"
authors = ["Zzz"]
build = false
autolib = false
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = "foo"
homepage = "https://example.com/"
readme = false
license = "MIT"
resolver = "2"

[lib]
name = "a"
path = "src/lib.rs"

"##]];

    let f = File::open(&p.root().join("target/package/a-0.1.0.crate")).unwrap();
    validate_crate_contents(
        f,
        "a-0.1.0.crate",
        &["Cargo.toml", "Cargo.toml.orig", "src/lib.rs", "Cargo.lock"],
        [("Cargo.toml", rewritten_toml)],
    );
}

#[cargo_test]
fn tree_all() {
    // `cargo tree` with the new feature resolver.
    Package::new("log", "0.4.8").feature("serde", &[]).publish();
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2015"
                resolver = "2"

                [target.'cfg(whatever)'.dependencies]
                log = {version="*", features=["serde"]}
            "#,
        )
        .file("src/lib.rs", "")
        .build();
    p.cargo("tree --target=all")
        .with_stdout_data(str![[r#"
foo v0.1.0 ([ROOT]/foo)
└── log v0.4.8

"#]])
        .run();
}

#[cargo_test]
fn shared_dep_same_but_dependencies() {
    // Checks for a bug of nondeterminism. This scenario creates a shared
    // dependency `dep` which needs to be built twice (once as normal, and
    // once as a build dep). However, in both cases the flags to `dep` are the
    // same, the only difference is what it links to. The normal dependency
    // should link to `subdep` with the feature disabled, and the build
    // dependency should link to it with it enabled. Crucially, the `--target`
    // flag should not be specified, otherwise Unit.kind would be different
    // and avoid the collision, and this bug won't manifest.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [workspace]
                members = ["bin1", "bin2"]
                resolver = "2"
            "#,
        )
        .file(
            "bin1/Cargo.toml",
            r#"
                [package]
                name = "bin1"
                version = "0.1.0"
                edition = "2015"

                [dependencies]
                dep = { path = "../dep" }
            "#,
        )
        .file("bin1/src/main.rs", "fn main() { dep::feat_func(); }")
        .file(
            "bin2/Cargo.toml",
            r#"
                [package]
                name = "bin2"
                version = "0.1.0"
                edition = "2015"

                [build-dependencies]
                dep = { path = "../dep" }
                subdep = { path = "../subdep", features = ["feat"] }
            "#,
        )
        .file("bin2/build.rs", "fn main() { dep::feat_func(); }")
        .file("bin2/src/main.rs", "fn main() {}")
        .file(
            "dep/Cargo.toml",
            r#"
                [package]
                name = "dep"
                version = "0.1.0"
                edition = "2015"

                [dependencies]
                subdep = { path = "../subdep" }
            "#,
        )
        .file(
            "dep/src/lib.rs",
            "pub fn feat_func() { subdep::feat_func(); }",
        )
        .file(
            "subdep/Cargo.toml",
            r#"
                [package]
                name = "subdep"
                version = "0.1.0"
                edition = "2015"

                [features]
                feat = []
            "#,
        )
        .file(
            "subdep/src/lib.rs",
            r#"
                pub fn feat_func() {
                    #[cfg(feature = "feat")] println!("cargo::warning=feat: enabled");
                    #[cfg(not(feature = "feat"))] println!("cargo::warning=feat: not enabled");
                }
            "#,
        )
        .build();

    p.cargo("build --bin bin1 --bin bin2")
        // unordered because bin1 and bin2 build at the same time
        .with_stderr_data(
            str![[r#"
[COMPILING] subdep v0.1.0 ([ROOT]/foo/subdep)
[COMPILING] dep v0.1.0 ([ROOT]/foo/dep)
[COMPILING] bin1 v0.1.0 ([ROOT]/foo/bin1)
[COMPILING] bin2 v0.1.0 ([ROOT]/foo/bin2)
[WARNING] bin2@0.1.0: feat: enabled
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]]
            .unordered(),
        )
        .run();
    p.process(p.bin("bin1"))
        .with_stdout_data(str![[r#"
cargo::warning=feat: not enabled

"#]])
        .run();

    // Make sure everything stays cached.
    p.cargo("build -v --bin bin1 --bin bin2")
        .with_stderr_data(
            str![[r#"
[FRESH] subdep v0.1.0 ([ROOT]/foo/subdep)
[FRESH] dep v0.1.0 ([ROOT]/foo/dep)
[FRESH] bin1 v0.1.0 ([ROOT]/foo/bin1)
[WARNING] bin2@0.1.0: feat: enabled
[FRESH] bin2 v0.1.0 ([ROOT]/foo/bin2)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]]
            .unordered(),
        )
        .run();
}

#[cargo_test]
fn test_proc_macro() {
    // Running `cargo test` on a proc-macro, with a shared dependency that has
    // different features.
    //
    // There was a bug where `shared` was built twice (once with feature "B"
    // and once without), and both copies linked into the unit test. This
    // would cause a type failure when used in an intermediate dependency
    // (the-macro-support).
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "runtime"
                version = "0.1.0"
                edition = "2015"
                resolver = "2"

                [dependencies]
                the-macro = { path = "the-macro", features = ['a'] }
                [build-dependencies]
                shared = { path = "shared", features = ['b'] }
            "#,
        )
        .file("src/lib.rs", "")
        .file(
            "the-macro/Cargo.toml",
            r#"
                [package]
                name = "the-macro"
                version = "0.1.0"
                edition = "2015"
                [lib]
                proc-macro = true
                test = false
                [dependencies]
                the-macro-support = { path = "../the-macro-support" }
                shared = { path = "../shared" }
                [dev-dependencies]
                runtime = { path = ".." }
                [features]
                a = []
            "#,
        )
        .file(
            "the-macro/src/lib.rs",
            "
                fn _test() {
                    the_macro_support::foo(shared::Foo);
                }
            ",
        )
        .file(
            "the-macro-support/Cargo.toml",
            r#"
                [package]
                name = "the-macro-support"
                version = "0.1.0"
                edition = "2015"
                [dependencies]
                shared = { path = "../shared" }
            "#,
        )
        .file(
            "the-macro-support/src/lib.rs",
            "
                pub fn foo(_: shared::Foo) {}
            ",
        )
        .file(
            "shared/Cargo.toml",
            r#"
                [package]
                name = "shared"
                version = "0.1.0"
                edition = "2015"
                [features]
                b = []
            "#,
        )
        .file("shared/src/lib.rs", "pub struct Foo;")
        .build();
    p.cargo("test --manifest-path the-macro/Cargo.toml").run();
}

#[cargo_test]
fn doc_optional() {
    // Checks for a bug where `cargo doc` was failing with an inactive target
    // that enables a shared optional dependency.
    Package::new("spin", "1.0.0").publish();
    Package::new("bar", "1.0.0")
        .add_dep(Dependency::new("spin", "1.0").optional(true))
        .publish();
    // The enabler package enables the `spin` feature, which we don't want.
    Package::new("enabler", "1.0.0")
        .feature_dep("bar", "1.0", &["spin"])
        .publish();
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2015"
                resolver = "2"

                [target.'cfg(whatever)'.dependencies]
                enabler = "1.0"

                [dependencies]
                bar = "1.0"
            "#,
        )
        .file("src/lib.rs", "")
        .build();

    p.cargo("doc")
        .with_stderr_data(
            str![[r#"
[UPDATING] `dummy-registry` index
[LOCKING] 3 packages to latest compatible versions
[DOWNLOADING] crates ...
[DOWNLOADED] spin v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] bar v1.0.0 (registry `dummy-registry`)
[DOCUMENTING] bar v1.0.0
[CHECKING] bar v1.0.0
[DOCUMENTING] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
[GENERATED] [ROOT]/foo/target/doc/foo/index.html

"#]]
            .unordered(),
        )
        .run();
}

#[cargo_test]
fn minimal_download() {
    // Various checks that it only downloads the minimum set of dependencies
    // needed in various situations.
    //
    // This checks several permutations of the different
    // host_dep/dev_dep/itarget settings. These 3 are planned to be stabilized
    // together, so there isn't much need to be concerned about how the behave
    // independently. However, there are some cases where they do behave
    // independently. Specifically:
    //
    // * `cargo test` forces dev_dep decoupling to be disabled.
    // * `cargo tree --target=all` forces ignore_inactive_targets off and decouple_dev_deps off.
    // * `cargo tree --target=all -e normal` forces ignore_inactive_targets off.
    //
    // However, `cargo tree` is a little weird because it downloads everything
    // anyways.
    //
    // So to summarize the different permutations:
    //
    // dev_dep | host_dep | itarget | Notes
    // --------|----------|---------|----------------------------
    //         |          |         | -Zfeatures=compare (new resolver should behave same as old)
    //         |          |    ✓    | This scenario should not happen.
    //         |     ✓    |         | `cargo tree --target=all -Zfeatures=all`†
    //         |     ✓    |    ✓    | `cargo test`
    //    ✓    |          |         | This scenario should not happen.
    //    ✓    |          |    ✓    | This scenario should not happen.
    //    ✓    |     ✓    |         | `cargo tree --target=all -e normal -Z features=all`†
    //    ✓    |     ✓    |    ✓    | A normal build.
    //
    // † — However, `cargo tree` downloads everything.
    Package::new("normal", "1.0.0").publish();
    Package::new("normal_pm", "1.0.0").publish();
    Package::new("normal_opt", "1.0.0").publish();
    Package::new("dev_dep", "1.0.0").publish();
    Package::new("dev_dep_pm", "1.0.0").publish();
    Package::new("build_dep", "1.0.0").publish();
    Package::new("build_dep_pm", "1.0.0").publish();
    Package::new("build_dep_opt", "1.0.0").publish();

    Package::new("itarget_normal", "1.0.0").publish();
    Package::new("itarget_normal_pm", "1.0.0").publish();
    Package::new("itarget_dev_dep", "1.0.0").publish();
    Package::new("itarget_dev_dep_pm", "1.0.0").publish();
    Package::new("itarget_build_dep", "1.0.0").publish();
    Package::new("itarget_build_dep_pm", "1.0.0").publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2015"

                [dependencies]
                normal = "1.0"
                normal_pm = "1.0"
                normal_opt = { version = "1.0", optional = true }

                [dev-dependencies]
                dev_dep = "1.0"
                dev_dep_pm = "1.0"

                [build-dependencies]
                build_dep = "1.0"
                build_dep_pm = "1.0"
                build_dep_opt = { version = "1.0", optional = true }

                [target.'cfg(whatever)'.dependencies]
                itarget_normal = "1.0"
                itarget_normal_pm = "1.0"

                [target.'cfg(whatever)'.dev-dependencies]
                itarget_dev_dep = "1.0"
                itarget_dev_dep_pm = "1.0"

                [target.'cfg(whatever)'.build-dependencies]
                itarget_build_dep = "1.0"
                itarget_build_dep_pm = "1.0"
            "#,
        )
        .file("src/lib.rs", "")
        .file("build.rs", "fn main() {}")
        .build();

    let clear = || {
        paths::cargo_home().join("registry/cache").rm_rf();
        paths::cargo_home().join("registry/src").rm_rf();
        p.build_dir().rm_rf();
    };

    // none
    // Should be the same as `-Zfeatures=all`
    p.cargo("check -Zfeatures=compare")
        .masquerade_as_nightly_cargo(&["features=compare"])
        .with_stderr_data(
            str![[r#"
[UPDATING] `dummy-registry` index
[LOCKING] 14 packages to latest compatible versions
[DOWNLOADING] crates ...
[DOWNLOADED] normal_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] normal v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep v1.0.0 (registry `dummy-registry`)
[COMPILING] build_dep v1.0.0
[COMPILING] build_dep_pm v1.0.0
[CHECKING] normal_pm v1.0.0
[CHECKING] normal v1.0.0
[COMPILING] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]]
            .unordered(),
        )
        .run();
    clear();

    // New behavior
    switch_to_resolver_2(&p);

    // all
    p.cargo("check")
        .with_stderr_data(
            str![[r#"
[DOWNLOADING] crates ...
[DOWNLOADED] normal_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] normal v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep v1.0.0 (registry `dummy-registry`)
[COMPILING] build_dep_pm v1.0.0
[COMPILING] build_dep v1.0.0
[CHECKING] normal_pm v1.0.0
[CHECKING] normal v1.0.0
[COMPILING] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]]
            .unordered(),
        )
        .run();
    clear();

    // This disables decouple_dev_deps.
    p.cargo("test --no-run")
        .with_stderr_data(
            str![[r#"
[DOWNLOADING] crates ...
[DOWNLOADED] normal_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] normal v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] dev_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] dev_dep v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep v1.0.0 (registry `dummy-registry`)
[COMPILING] build_dep_pm v1.0.0
[COMPILING] build_dep v1.0.0
[COMPILING] normal_pm v1.0.0
[COMPILING] normal v1.0.0
[COMPILING] dev_dep v1.0.0
[COMPILING] dev_dep_pm v1.0.0
[COMPILING] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `test` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
[EXECUTABLE] unittests src/lib.rs (target/debug/deps/foo-[HASH][EXE])

"#]]
            .unordered(),
        )
        .run();
    clear();

    // This disables itarget, but leaves decouple_dev_deps enabled.
    p.cargo("tree -e normal --target=all")
        .with_stderr_data(
            str![[r#"
[DOWNLOADING] crates ...
[DOWNLOADED] normal_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] normal v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_normal_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_normal v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_build_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_build_dep v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep v1.0.0 (registry `dummy-registry`)

"#]]
            .unordered(),
        )
        .with_stdout_data(str![[r#"
foo v0.1.0 ([ROOT]/foo)
├── itarget_normal v1.0.0
├── itarget_normal_pm v1.0.0
├── normal v1.0.0
└── normal_pm v1.0.0

"#]])
        .run();
    clear();

    // This disables itarget and decouple_dev_deps.
    p.cargo("tree --target=all")
        .with_stderr_data(
            str![[r#"
[DOWNLOADING] crates ...
[DOWNLOADED] normal_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] normal v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_normal_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_normal v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_dev_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_dev_dep v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_build_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] itarget_build_dep v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] dev_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] dev_dep v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep_pm v1.0.0 (registry `dummy-registry`)
[DOWNLOADED] build_dep v1.0.0 (registry `dummy-registry`)

"#]]
            .unordered(),
        )
        .with_stdout_data(str![[r#"
foo v0.1.0 ([ROOT]/foo)
├── itarget_normal v1.0.0
├── itarget_normal_pm v1.0.0
├── normal v1.0.0
└── normal_pm v1.0.0
[build-dependencies]
├── build_dep v1.0.0
├── build_dep_pm v1.0.0
├── itarget_build_dep v1.0.0
└── itarget_build_dep_pm v1.0.0
[dev-dependencies]
├── dev_dep v1.0.0
├── dev_dep_pm v1.0.0
├── itarget_dev_dep v1.0.0
└── itarget_dev_dep_pm v1.0.0

"#]])
        .run();
    clear();
}

#[cargo_test]
fn pm_with_int_shared() {
    // This is a somewhat complex scenario of a proc-macro in a workspace with
    // an integration test where the proc-macro is used for other things, and
    // *everything* is built at once (`--workspace --all-targets
    // --all-features`). There was a bug where the UnitFor settings were being
    // incorrectly computed based on the order that the graph was traversed.
    //
    // There are some uncertainties about exactly how proc-macros should behave
    // with `--workspace`, see https://github.com/rust-lang/cargo/issues/8312.
    //
    // This uses a const-eval hack to do compile-time feature checking.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [workspace]
                members = ["foo", "pm", "shared"]
                resolver = "2"
            "#,
        )
        .file(
            "foo/Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2018"

                [dependencies]
                pm = { path = "../pm" }
                shared = { path = "../shared", features = ["norm-feat"] }
            "#,
        )
        .file(
            "foo/src/lib.rs",
            r#"
                // foo->shared always has both features set
                const _CHECK: [(); 0] = [(); 0-!(shared::FEATS==3) as usize];
            "#,
        )
        .file(
            "pm/Cargo.toml",
            r#"
                [package]
                name = "pm"
                version = "0.1.0"
                edition = "2015"

                [lib]
                proc-macro = true

                [dependencies]
                shared = { path = "../shared", features = ["host-feat"] }
            "#,
        )
        .file(
            "pm/src/lib.rs",
            r#"
                // pm->shared always has just host
                const _CHECK: [(); 0] = [(); 0-!(shared::FEATS==1) as usize];
            "#,
        )
        .file(
            "pm/tests/pm_test.rs",
            r#"
                // integration test gets both set
                const _CHECK: [(); 0] = [(); 0-!(shared::FEATS==3) as usize];
            "#,
        )
        .file(
            "shared/Cargo.toml",
            r#"
                [package]
                name = "shared"
                version = "0.1.0"
                edition = "2015"

                [features]
                norm-feat = []
                host-feat = []
            "#,
        )
        .file(
            "shared/src/lib.rs",
            r#"
                pub const FEATS: u32 = {
                    if cfg!(feature="norm-feat") && cfg!(feature="host-feat") {
                        3
                    } else if cfg!(feature="norm-feat") {
                        2
                    } else if cfg!(feature="host-feat") {
                        1
                    } else {
                        0
                    }
                };
            "#,
        )
        .build();

    p.cargo("build --workspace --all-targets --all-features -v")
        .with_stderr_data(
            str![[r#"
[COMPILING] shared v0.1.0 ([ROOT]/foo/shared)
[RUNNING] `rustc --crate-name shared [..]--crate-type lib [..]`
[RUNNING] `rustc --crate-name shared [..]--crate-type lib [..]`
[RUNNING] `rustc --crate-name shared [..]--test[..]`
[COMPILING] pm v0.1.0 ([ROOT]/foo/pm)
[RUNNING] `rustc --crate-name pm [..]--crate-type proc-macro[..]`
[RUNNING] `rustc --crate-name pm [..]--test[..]`
[COMPILING] foo v0.1.0 ([ROOT]/foo/foo)
[RUNNING] `rustc --crate-name foo [..]--crate-type lib [..]`
[RUNNING] `rustc --crate-name foo [..]--test[..]`
[RUNNING] `rustc --crate-name pm_test [..]--test[..]`
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]]
            .unordered(),
        )
        .run();

    // And again, should stay fresh.
    p.cargo("build --workspace --all-targets --all-features -v")
        .with_stderr_data(
            str![[r#"
[FRESH] pm v0.1.0 ([ROOT]/foo/pm)
[FRESH] foo v0.1.0 ([ROOT]/foo/foo)
[FRESH] shared v0.1.0 ([ROOT]/foo/shared)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]]
            .unordered(),
        )
        .run();
}

#[cargo_test]
fn doc_proc_macro() {
    // Checks for a bug when documenting a proc-macro with a dependency. The
    // doc unit builder was not carrying the "for host" setting through the
    // dependencies, and the `pm-dep` dependency was causing a panic because
    // it was looking for target features instead of host features.
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2015"
                resolver = "2"

                [dependencies]
                pm = { path = "pm" }
            "#,
        )
        .file("src/lib.rs", "")
        .file(
            "pm/Cargo.toml",
            r#"
                [package]
                name = "pm"
                version = "0.1.0"
                edition = "2015"

                [lib]
                proc-macro = true

                [dependencies]
                pm-dep = { path = "../pm-dep" }
            "#,
        )
        .file("pm/src/lib.rs", "")
        .file("pm-dep/Cargo.toml", &basic_manifest("pm-dep", "0.1.0"))
        .file("pm-dep/src/lib.rs", "")
        .build();

    // Unfortunately this cannot check the output because what it prints is
    // nondeterministic. Sometimes it says "Compiling pm-dep" and sometimes
    // "Checking pm-dep". This is because it is both building it and checking
    // it in parallel (building so it can build the proc-macro, and checking
    // so rustdoc can load it).
    p.cargo("doc").run();
}

#[cargo_test]
fn edition_2021_default_2() {
    // edition = 2021 defaults to v2 resolver.
    Package::new("common", "1.0.0")
        .feature("f1", &[])
        .file("src/lib.rs", "")
        .publish();

    Package::new("bar", "1.0.0")
        .add_dep(
            Dependency::new("common", "1.0")
                .target("cfg(whatever)")
                .enable_features(&["f1"]),
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2015"

                [dependencies]
                common = "1.0"
                bar = "1.0"
            "#,
        )
        .file("src/lib.rs", "")
        .build();

    // First without edition.
    p.cargo("tree -f")
        .arg("{p} feats:{f}")
        .with_stdout_data(str![[r#"
foo v0.1.0 ([ROOT]/foo) feats:
├── bar v1.0.0 feats:
└── common v1.0.0 feats:f1

"#]])
        .run();

    p.change_file(
        "Cargo.toml",
        r#"
            cargo-features = ["edition2021"]

            [package]
            name = "foo"
            version = "0.1.0"
            edition = "2021"

            [dependencies]
            common = "1.0"
            bar = "1.0"
        "#,
    );

    // Importantly, this does not include `f1` on `common`.
    p.cargo("tree -f")
        .arg("{p} feats:{f}")
        .with_stdout_data(str![[r#"
foo v0.1.0 ([ROOT]/foo) feats:
├── bar v1.0.0 feats:
└── common v1.0.0 feats:

"#]])
        .run();
}

#[cargo_test]
fn all_features_merges_with_features() {
    Package::new("dep", "0.1.0")
        .feature("feat1", &[])
        .file(
            "src/lib.rs",
            r#"
                #[cfg(feature="feat1")]
                pub fn work() {
                    println!("it works");
                }
            "#,
        )
        .publish();

    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2018"

                [features]
                a = []

                [dependencies]
                dep = "0.1"

                [[example]]
                name = "ex"
                required-features = ["a", "dep/feat1"]
            "#,
        )
        .file(
            "examples/ex.rs",
            r#"
            fn main() {
                dep::work();
            }
            "#,
        )
        .file("src/lib.rs", "")
        .build();

    p.cargo("run --example ex --all-features --features dep/feat1")
        .with_stderr_data(str![[r#"
[UPDATING] `dummy-registry` index
[LOCKING] 1 package to latest compatible version
[DOWNLOADING] crates ...
[DOWNLOADED] dep v0.1.0 (registry `dummy-registry`)
[COMPILING] dep v0.1.0
[COMPILING] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
[RUNNING] `target/debug/examples/ex[EXE]`

"#]])
        .with_stdout_data(str![[r#"
it works

"#]])
        .run();

    switch_to_resolver_2(&p);

    p.cargo("run --example ex --all-features --features dep/feat1")
        .with_stderr_data(str![[r#"
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
[RUNNING] `target/debug/examples/ex[EXE]`

"#]])
        .with_stdout_data(str![[r#"
it works

"#]])
        .run();
}

#[cargo_test]
fn dep_with_optional_host_deps_activated() {
    // To prevent regression like rust-lang/cargo#11330
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                version = "0.1.0"
                edition = "2021"

                [dependencies]
                serde = { path = "serde", features = ["derive", "build"] }
            "#,
        )
        .file("src/lib.rs", "")
        .file(
            "serde/Cargo.toml",
            r#"
                [package]
                name = "serde"
                version = "0.1.0"
                edition = "2021"

                [dependencies]
                serde_derive = { path = "../serde_derive", optional = true }

                [build-dependencies]
                serde_build = { path = "../serde_build", optional = true }

                [features]
                derive = ["dep:serde_derive"]
                build = ["dep:serde_build"]
            "#,
        )
        .file("serde/src/lib.rs", "")
        .file("serde/build.rs", "fn main() {}")
        .file(
            "serde_derive/Cargo.toml",
            r#"
                [package]
                name = "serde_derive"
                version = "0.1.0"
                edition = "2021"

                [lib]
                proc-macro = true
            "#,
        )
        .file("serde_derive/src/lib.rs", "")
        .file(
            "serde_build/Cargo.toml",
            &basic_manifest("serde_build", "0.1.0"),
        )
        .file("serde_build/src/lib.rs", "")
        .build();

    p.cargo("check")
        .with_stderr_data(str![[r#"
[LOCKING] 3 packages to latest compatible versions
[COMPILING] serde_build v0.1.0 ([ROOT]/foo/serde_build)
[COMPILING] serde_derive v0.1.0 ([ROOT]/foo/serde_derive)
[COMPILING] serde v0.1.0 ([ROOT]/foo/serde)
[CHECKING] foo v0.1.0 ([ROOT]/foo)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
}

#[cargo_test]
fn dont_unify_proc_macro_example_from_dependency() {
    // See https://github.com/rust-lang/cargo/issues/13726
    let p = project()
        .file(
            "Cargo.toml",
            r#"
                [package]
                name = "foo"
                edition = "2021"

                [dependencies]
                pm_helper = { path = "pm_helper" }
            "#,
        )
        .file("src/lib.rs", "")
        .file(
            "pm_helper/Cargo.toml",
            r#"
                [package]
                name = "pm_helper"

                [[example]]
                name = "pm"
                proc-macro = true
                crate-type = ["proc-macro"]
            "#,
        )
        .file("pm_helper/src/lib.rs", "")
        .file("pm_helper/examples/pm.rs", "")
        .build();

    p.cargo("check")
        .with_stderr_data(str![[r#"
[LOCKING] 1 package to latest compatible version
[CHECKING] pm_helper v0.0.0 ([ROOT]/foo/pm_helper)
[CHECKING] foo v0.0.0 ([ROOT]/foo)
[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s

"#]])
        .run();
}