when:
        launchTests { TestLauncher launcher ->
            launcher.withTestsFor { TestSpecs specs ->
                specs.forTaskPath(':secondTest')
                     .includeClass('example.MyTest')
                     .includeClass('example2.MyOtherTest2')
            }
        }

        then:
        events.testClassesAndMethods.size() == 5

        when:
        launchTests { TestLauncher launcher ->
            launcher.withTestsFor { TestSpecs specs ->
                specs.forTaskPath(':myTestTask').includeClass('org.my.MyClass')
            }
        }

        then:
        Throwable exception = thrown(TestExecutionException)

     *
     * @param cls The fully-qualified name of the target class.
     * @return this
     */
    TestSpec includeClass(String cls);

    /**
     * Adds the target test classes to the test execution.
     *
     * @see #includeClass(String)
     * @param classes The fully-qualified name of the target classes.
     * @return this
     */

        launchTests { TestLauncher launcher ->
            launcher.withArguments("--configuration-cache")
            launcher.withTestsFor { TestSpecs specs ->
                specs.forTaskPath(':secondTest').includeClass("example.MyTest")
            }
        }

        then:
        // TestLauncher configuration ignored: only tests from the configuration cache entry is executed

    }

    @Override
    public TestSpec includePackages(Collection<String> packages) {
        this.packages.addAll(packages);
        return this;
    }

    @Override
    public TestSpec includeClass(String cls) {
        return includeClasses(Collections.singletonList(cls));
    }

    @Override
    public TestSpec includeClasses(Collection<String> classes) {
        this.classes.addAll(classes);

     *     testLauncher.withTestsFor(spec -> {
     *         spec.forTaskPath(":test")
     *             .includePackage("org.pkg")
     *             .includeClass("com.TestClass")
     *             .includeMethod("com.TestClass")
     *             .includePattern("io.*")
     *     }).run();
     * </pre>
     *
     * <p>

abstract class MessageBuilderHelper {

    static Collection<String> pathTo(EdgeState edge) {
        return pathTo(edge, true);
    }

    static Collection<String> pathTo(EdgeState edge, boolean includeLast) {
        List<List<EdgeState>> acc = Lists.newArrayListWithExpectedSize(1);
        pathTo(edge, new ArrayList<>(), acc, new HashSet<>());
        List<String> result = Lists.newArrayListWithCapacity(acc.size());