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/// Implementation-only dependencies of modules imported as testable are
/// optional, we attempt to load them but don't error if they are missing.
// RUN: %empty-directory(%t)
// RUN: split-file %s %t
/// Build the hidden implementation-only dependency and the testable module.
// RUN: %target-swift-frontend -emit-module %t/HiddenDep.swift -o %t \
// RUN: -swift-version 5 -enable-library-evolution
// RUN: %target-swift-frontend -emit-module %t/TestedLib.swift -o %t \
// RUN: -swift-version 5 -enable-library-evolution -I %t \
// RUN: -enable-testing
/// A client should ignore the transitive implementation-only dependency for a
/// normal import.
// RUN: %target-swift-frontend -typecheck %t/ClientNormalImport.swift -o %t \
// RUN: -swift-version 5 -I %t -Rmodule-loading 2>&1 | \
// RUN: %FileCheck --check-prefix=CHECK-NOT-LOADED %s
/// A client should load the transitive implementation-only dependency of
/// a module imported @testable.
// RUN: %target-swift-frontend -typecheck %t/ClientTestableImport.swift -o %t \
// RUN: -swift-version 5 -I %t -Rmodule-loading 2>&1 | %FileCheck %s
/// If the dependency is missing we don't fail at loading, but we may still
/// fail later accessing decls missing because of references to the not-loaded module.
// RUN: rm %t/HiddenDep.swiftmodule
/// The transitive dependency is not loaded but a client can still build fine.
// RUN: %target-swift-frontend -typecheck %t/ClientNormalImport.swift -o %t \
// RUN: -swift-version 5 -I %t -Rmodule-loading 2>&1 | \
// RUN: %FileCheck %s --check-prefix=CHECK-NOT-LOADED
/// Clients referencing a decl that depends on the hidden module don't see the
/// decl, it is dropped by deserialization recovery.
// RUN: %target-swift-frontend -typecheck %t/ClientTestableImport.swift -o %t \
// RUN: -swift-version 5 -I %t -verify
//--- HiddenDep.swift
public struct HiddenType {}
//--- TestedLib.swift
@_implementationOnly import HiddenDep
internal func dependsOnHiddenType() -> HiddenType { fatalError() }
//--- ClientNormalImport.swift
/// Note that the import doesn't have to be testable, only the imported module
/// needs to enable testing. We may want to improve upon this in the future.
import TestedLib
// Note: extra newlines below ensure that context printing doesn't show the
// lines that we shouldn't see.
// CHECK-NOT-LOADED-NOT: remark: loaded module 'HiddenDep'
//--- ClientTestableImport.swift
@testable import TestedLib
// CHECK: remark: loaded module 'HiddenDep'
let _ = dependsOnHiddenType() // expected-error {{cannot find 'dependsOnHiddenType' in scope}}
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