}

    private void reportErrors(Map<File, List<Error>> errors, File reportFile) {
        try (PrintWriter fw = new PrintWriter(new FileWriter(reportFile))) {
            writeHeader(fw);
            if (errors.isEmpty()) {
                fw.println("All clear!");
                return;
            }
            for (Map.Entry<File, List<Error>> e : errors.entrySet()) {
                File file = e.getKey();

  @CollectionSize.Require(ZERO)
  public void testIsEmpty_yes() {
    assertTrue("isEmpty() should return true", getMap().isEmpty());
  }

  @CollectionSize.Require(absent = ZERO)
  public void testIsEmpty_no() {
    assertFalse("isEmpty() should return false", getMap().isEmpty());
  }

  @CollectionSize.Require(ZERO)
  public void testIsEmpty_yes() {
    assertTrue("isEmpty() should return true", collection.isEmpty());
  }

  @CollectionSize.Require(absent = ZERO)
  public void testIsEmpty_no() {
    assertFalse("isEmpty() should return false", collection.isEmpty());
  }

    }

    public ExecutionListener chainListener(ExecutionListener listener) {
        if (eventSpies.isEmpty()) {
            return listener;
        }
        return new EventSpyExecutionListener(this, listener);
    }

    public RepositoryListener chainListener(RepositoryListener listener) {
        if (eventSpies.isEmpty()) {
            return listener;
        }
        return new EventSpyRepositoryListener(this, listener);

    assertThat(requirements.getPresentFeatures()).isEmpty();
    assertThat(requirements.getAbsentFeatures()).isEmpty();
  }

  public void testBuildTesterRequirements_class_empty() throws Exception {
    @Require
    class Tester {}

    TesterRequirements requirements = buildTesterRequirements(Tester.class);

    assertThat(requirements.getPresentFeatures()).isEmpty();

  }

  /**
   * Returns an immutable range set containing the specified single range. If {@link Range#isEmpty()
   * range.isEmpty()}, this is equivalent to {@link ImmutableRangeSet#of()}.
   */
  public static <C extends Comparable> ImmutableRangeSet<C> of(Range<C> range) {
    checkNotNull(range);
    if (range.isEmpty()) {
      return of();
    } else if (range.equals(Range.all())) {
      return all();
    } else {

        mergeSite_Url(target, source, sourceDominant, context);
    }

    protected boolean isSiteEmpty(Site site) {
        return StringUtils.isEmpty(site.getId())
                && StringUtils.isEmpty(site.getName())
                && StringUtils.isEmpty(site.getUrl());
    }

    @Override
    protected void mergeSite_Url(Site target, Site source, boolean sourceDominant, Map<Object, Object> context) {

    redQueue.execute("task", 100.µs) {
      log += "run@${taskFaker.nanoTime}"
    }

    taskFaker.advanceUntil(0.µs)
    assertThat(log).isEmpty()

    redQueue.cancelAll()

    taskFaker.advanceUntil(99.µs)
    assertThat(log).isEmpty()

    taskFaker.assertNoMoreTasks()

    assertThat(testLogHandler.takeAll()).containsExactly(
      "FINE: Q10000 scheduled after 100 µs: task",

    assertTrue(map.isEmpty());
    assertEquals(0, map.size());
    assertFalse(map.containsKey("1"));
    assertFalse(map.containsKey("2"));
    assertFalse(map.containsKey("3"));
    assertEquals(0L, map.get("1"));
    assertEquals(0L, map.get("2"));
    assertEquals(0L, map.get("3"));

    map.putAll(in);
    assertFalse(map.isEmpty());
    assertEquals(3, map.size());

                && profile.getDistributionManagement() == null
                && profile.getModules().isEmpty()
                && profile.getSubprojects().isEmpty()
                && profile.getProperties().isEmpty()
                && profile.getRepositories().isEmpty()
                && profile.getPluginRepositories().isEmpty()
                && profile.getReporting() == null;
    }