id 'cpp-library'
                id 'cpp-unit-test'
            }
"""
        def lib = new CppLib()
        lib.sources.writeToProject(testDirectory)
        lib.privateHeaders.writeToSourceDir(testDirectory.file("src/main/cpp"))
        lib.publicHeaders.writeToProject(testDirectory)
        file("src/test/cpp/test.cpp") << "// test"

        when:
        run("generateSwiftPmManifest")

        then:

        given:
        writeHelloLibrary { TestFile libraryPath ->
            app.greeterLib.publicHeaders.writeToSourceDir(testDirectory.file("staging-includes"))
            app.greeterLib.privateHeaders.writeToSourceDir(libraryPath.file("src/main/headers"))
            app.greeterLib.sources.writeToSourceDir(libraryPath.file("src/main/cpp"))
            libraryPath.file('build.gradle') << '''
                library {

        def lib = new CppLib()
        settingsFile << "rootProject.name = 'hello'"

        given:
        lib.sources.writeToSourceDir(file("srcs"))
        lib.privateHeaders.writeToSourceDir(file("include"))
        lib.publicHeaders.writeToSourceDir(file("pub"))
        file("src/main/public/${lib.greeter.header.sourceFile.name}") << "ignore me!"

        def app = new CppApp()

        given:
        app.headers.writeToProject(testDirectory)
        app.main.writeToSourceDir(file("srcs/main.cpp"))
        app.greeter.writeToSourceDir(file("srcs/one.cpp"))
        app.sum.writeToSourceDir(file("srcs/two.cpp"))
        file("src/main/cpp/broken.cpp") << "ignore me!"

        and:
        buildFile << """

            sourceFile.writeToDir(srcDir);
        }
    }

    /**
     * Writes the source files of this element to the given source directory.
     */
    public void writeToSourceDir(TestFile sourceDir) {
        for (SourceFile sourceFile : getFiles()) {
            sourceFile.writeToFile(sourceDir.file(sourceFile.getName()));
        }
    }

    public static SourceElement empty() {

        given:
        def lib = new SwiftLib()
        settingsFile << "rootProject.name = '${lib.projectName}'"
        lib.greeter.writeToSourceDir(file("src/one.swift"))
        lib.sum.writeToSourceDir(file("src/two.swift"))
        file("src/main/swift/broken.swift") << "ignore me!"

        and:
        buildFile << """
            apply plugin: 'swift-library'

                publicHeaders.from 'Includes'
            }
        """

        when:
        def lib = new CppLib()
        lib.publicHeaders.writeToSourceDir(file('Includes'))
        lib.privateHeaders.writeToSourceDir(file('Sources/include'))
        lib.sources.writeToSourceDir(file('Sources'))
        file('src/main/headers/ignore.h') << 'broken!'
        file('src/main/public/ignore.h') << 'broken!'

        settingsFile << "rootProject.name = '${app.projectName}'"
        app.writeToProject(testDirectory)

        app.main.writeToSourceDir(file("src/main.swift"))
        app.greeter.writeToSourceDir(file("src/one.swift"))
        app.sum.writeToSourceDir(file("src/two.swift"))
        file("src/main/swift/broken.swift") << "ignore me!"

        and:
        buildFile << """

        given:
        def lib = new SwiftLibWithXCTest()
        settingsFile << "rootProject.name = '${lib.projectName}'"
        buildFile << "apply plugin: 'swift-library'"
        lib.main.writeToSourceDir(file("Sources"))
        lib.test.writeToSourceDir(file("Tests"))
        file("src/main/swift/broken.swift") << "ignore me!"
        file("src/test/swift/broken.swift") << "ignore me!"

        and:
        buildFile << """

            apply plugin: 'swift-application'

            application {
                source.from 'Sources'
            }
        """

        when:
        def app = new SwiftApp()
        app.writeToSourceDir(file('Sources'))
        file('src/main/swift/ignore.swift') << 'broken!'
        succeeds("xcode")

        then:
        rootXcodeProject.projectFile.sources.assertHasChildren(app.files*.name)
    }