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#![allow(unused)] // Because indirectly included by e.g. system_wide_config.rs, but not used
use assert_cmd::Command;
use predicates::prelude::predicate;
use std::env;
use std::path::{Path, PathBuf};
/// For some tests we want mocked versions of some pagers
/// This fn returns the absolute path to the directory with these mocked pagers
fn get_mocked_pagers_dir() -> PathBuf {
let cargo_manifest_dir = env::var("CARGO_MANIFEST_DIR").expect("Missing CARGO_MANIFEST_DIR");
Path::new(&cargo_manifest_dir)
.join("tests")
.join("mocked-pagers")
}
/// On Unix: 'most' -> 'most'
/// On Windows: 'most' -> 'most.bat'
pub fn from(base: &str) -> String {
let mut cmd_and_args = shell_words::split(base).unwrap();
let suffix = if cfg!(windows) { ".bat" } else { "" };
let mut out_cmd = format!("{}{}", cmd_and_args.first().unwrap(), suffix);
if (cmd_and_args.len() > 1) {
out_cmd.push(' ');
out_cmd.push_str(cmd_and_args[1..].to_vec().join(" ").as_str());
}
out_cmd
}
/// Prepends a directory to the PATH environment variable
/// Returns the original value for later restoration
fn prepend_dir_to_path_env_var(dir: PathBuf) -> String {
// Get current PATH
let original_path = env::var("PATH").expect("No PATH?!");
// Add the new dir first
let mut split_paths = env::split_paths(&original_path).collect::<Vec<_>>();
split_paths.insert(0, dir);
// Set PATH with the new dir
let new_path = env::join_paths(split_paths).expect("Failed to join paths");
env::set_var("PATH", new_path);
// Return the original value for later restoration of it
original_path
}
/// Helper to restore the value of PATH
fn restore_path(original_path: String) {
env::set_var("PATH", original_path);
}
/// Allows test to run that require our mocked versions of 'more' and 'most'
/// in PATH. Temporarily changes PATH while the test code runs, and then restore it
/// to avoid pollution of global state
pub fn with_mocked_versions_of_more_and_most_in_path(actual_test: fn()) {
let original_path = prepend_dir_to_path_env_var(get_mocked_pagers_dir());
// Make sure our own variants of 'more' and 'most' are used
Command::new(from("more"))
.assert()
.success()
.stdout(predicate::str::contains("I am more"));
Command::new(from("most"))
.assert()
.success()
.stdout(predicate::str::contains("I am most"));
Command::new(from("echo"))
.arg("foobar")
.assert()
.success()
.stdout(predicate::str::contains("foobar"));
// Now run the actual test
actual_test();
// Make sure to restore PATH since it is global state
restore_path(original_path);
}
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