Supplier<Integer> supplier = new CountingSupplier();
    Function<@Nullable Object, Integer> function = Functions.forSupplier(supplier);

    assertEquals(1, (int) function.apply(null));
    assertEquals(2, (int) function.apply("foo"));

    new EqualsTester()
        .addEqualityGroup(function, Functions.forSupplier(supplier))
        .addEqualityGroup(Functions.forSupplier(new CountingSupplier()))

        if (queueSize < 1 || batchMaxSize < 1) {
            throw new IllegalArgumentException("Queue and batch sizes must be greater than 1");
        }
        this.batchMaxSize = batchMaxSize;
        this.blockOnLastEvent = blockOnLastEvent;

        this.eventQueue = new ArrayBlockingQueue<>(queueSize);
        Thread updater = new Thread(this::feedConsumer);
        updater.setDaemon(true);
        updater.start();

        MavenSession msession = new MavenSession(rsession, mavenRequest, new DefaultMavenExecutionResult());
        InternalSession session = new DefaultSession(
                msession,
                repositorySystem,
                null,
                mavenRepositorySystem,
                new SimpleLookup(List.of(
                        new DefaultRequestCacheFactory(),

        }

        problems.setRootModel(inputModel);

        ModelData resultData = new ModelData(request.getModelSource(), inputModel);
        ModelData superData = new ModelData(null, getSuperModel());

        Collection<String> parentIds = new LinkedHashSet<>();
        List<ModelData> lineage = new ArrayList<>();

        for (ModelData currentData = resultData; currentData != null; ) {

        MojoDescriptor mojoDescriptor = new MojoDescriptor();
        mojoDescriptor.setGoal("goal");
        PluginDescriptor pluginDescriptor = new PluginDescriptor();
        pluginDescriptor.setGoalPrefix("goalPrefix");
        pluginDescriptor.setArtifactId("artifactId");
        mojoDescriptor.setPluginDescriptor(pluginDescriptor);

        Parameter parameter = new Parameter();
        parameter.setType("java.lang.String[]");

    @Test
    void testToString() {
        LifecyclePhase phase = new LifecyclePhase();
        assertEquals("", phase.toString());

        LifecycleMojo mojo1 = new LifecycleMojo();
        mojo1.setGoal("jar:jar");
        phase.setMojos(Arrays.asList(mojo1));
        assertEquals("jar:jar", phase.toString());

        LifecycleMojo mojo2 = new LifecycleMojo();
        mojo2.setGoal("war:war");

                return (T) new DefaultArtifactResolver();
            } else if (clazz == ArtifactManager.class) {
                return (T) new DefaultArtifactManager(this);
            } else if (clazz == RepositoryFactory.class) {
                return (T) new DefaultRepositoryFactory(new DefaultRemoteRepositoryManager(
                        new DefaultUpdatePolicyAnalyzer(),
                        new DefaultChecksumPolicyProvider(),

    }

    @Test
    void testEquals() {
        ToolchainModel tm1 = new ToolchainModel();
        tm1.setType("jdk");
        tm1.addProvide("version", "1.5");
        tm1.addProvide("vendor", "sun");
        Xpp3Dom configuration1 = new Xpp3Dom("configuration");
        Xpp3Dom jdkHome1 = new Xpp3Dom("jdkHome");
        jdkHome1.setValue("${env.JAVA_HOME}");
        configuration1.addChild(jdkHome1);

  @GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(new FakeTicker());
  }

  @GwtIncompatible // java.time.Duration
  public void testAdvance() {
    FakeTicker ticker = new FakeTicker();
    assertEquals(0, ticker.read());
    assertSame(ticker, ticker.advance(10));
    assertEquals(10, ticker.read());

    @Override
    public String[] createKeyArray(int length) {
      return new String[length];
    }

    @Override
    public String[] createValueArray(int length) {
      return new String[length];
    }

    @Override
    public SampleElements<String> sampleKeys() {
      return new SampleElements<>("one", "two", "three", "four", "five");
    }

    @Override