IncrementalHelloWorldApp app
    String compileTask
    TestFile sourceFile
    TestFile sharedHeaderFile
    TestFile commonHeaderFile
    TestFile otherHeaderFile
    List<TestFile> otherSourceFiles = []
    TestFile objectFileDir
    CompilationOutputsFixture outputs

    abstract IncrementalHelloWorldApp getHelloWorldApp()

    String getSourceType() {
        GUtil.toCamelCase(app.sourceType)
    }