then:
        result.assertTasksExecutedAndNotSkipped(":a")
        outputFile.assertIsFile()

        when:
        configurationCacheRun "a"

        then:
        result.assertTasksSkipped(":a")

        when:
        outputFile.delete()
        configurationCacheRun "a"

        then:
        result.assertTasksExecutedAndNotSkipped(":a")
        outputFile.assertIsFile()
    }

        dirTaskOutput.assertExists()
        // Both can be from the cache because the dirTask ran first and the fileTask doesn't directly overlap with a file produced by dirTask
        result.assertTasksSkipped(dirTask, fileTask)
    }

    def "overlapping output with fileTask, dirTask then dirTask only"() {
        def (String fileTask, TestFile fileTaskOutput,

        expect:
        succeeds "assemble"
        result.assertTasksExecuted(tasksToAssembleDevelopmentBinary, ":assemble")
        // TODO - should skip the task as NO-SOURCE
        result.assertTasksSkipped(tasksToAssembleDevelopmentBinary, ":assemble")
    }

    def "build fails when compilation fails"() {
        given:
        makeSingleProject()

        and:

        then:
        result.assertTaskExecuted(":copy")
        file('dest').assertHasDescendants('subdir1/file1.txt', 'subdir2/file2.txt')

        when:
        run 'copy'

        then:
        result.assertTasksSkipped(":copy")

        when:
        createZip('test.zip') {
            subdir1 {
                file 'file1.txt'
            }
            subdir2 {
                file 'file2.xml'
            }

        result.assertHasPostBuildOutput "2 actionable tasks: 2 executed"

        when:
        file("build").deleteDir()
        withBuildCache().run "adHocTask", "executedTask"

        then:
        result.assertTasksSkipped(":adHocTask")
        result.assertTasksNotSkipped(":executedTask")
        result.assertHasPostBuildOutput "2 actionable tasks: 1 executed, 1 from cache"
    }

        succeeds("unexport")
        then:
        result.assertTasksNotSkipped(developmentBinaryCompileTask, ":unexport")

        when:
        succeeds("unexport")
        then:
        result.assertTasksSkipped(developmentBinaryCompileTask, ":unexport")

        when:
        componentUnderTest.applyChangesToProject(testDirectory)
        succeeds("unexport")
        then:

        def notSkippedTasks = tasks(":app").debug.allToInstall + [":app:assemble"]
        result.assertTasksExecuted(skippedTasks, notSkippedTasks)
        result.assertTasksNotSkipped(notSkippedTasks)
        result.assertTasksSkipped(skippedTasks)

        executable("app/build/exe/main/debug/app").assertDoesNotExist()
        file("app/build/exe/main/debug").assertDoesNotExist()
        file("app/build/obj/main/debug").assertDoesNotExist()

    /**
     * Asserts that exactly the given set of tasks have been skipped.
     */
    ExecutionResult assertTasksSkipped(Object... taskPaths);

    /**
     * Asserts the given task has been skipped.
     */
    ExecutionResult assertTaskSkipped(String taskPath);

    /**
     * Asserts that exactly the given set of tasks have not been skipped.
     */

        appSourceFile.replace("world", "planet")

        and:
        run installApp

        then:
        result.assertTasksExecuted(libraryDebug.allToLink, appDebug.allToInstall)
        result.assertTasksSkipped(libraryDebug.allToLink)
        result.assertTasksNotSkipped(appDebug.allToInstall)

        and:
        libObjects.noneRecompiled()
        appObjects.recompiledFile(appSourceFile)

        """

        expect:
        succeeds "assemble"
        result.assertTasksExecuted(":compileDebugSwift", ":linkDebug", ":assemble")
        // TODO - should skip the task as NO-SOURCE
        result.assertTasksSkipped(":compileDebugSwift", ":linkDebug", ":assemble")
    }

    def "build fails when compilation fails"() {
        given:
        buildFile << """
            apply plugin: 'swift-library'
         """