* {@link org.codelibs.core.lang.ObjectUtil#equals(java.lang.Object, java.lang.Object)}
     * .
     */
    @Test
    public void testEqualsObjectObject() {
        assertThat(ObjectUtil.equals(null, null), is(true));
        assertThat(ObjectUtil.equals(null, ""), is(false));
        assertThat(ObjectUtil.equals("", null), is(false));
        assertThat(ObjectUtil.equals("", ""), is(true));

        if ("always".equals(styleColor) || "yes".equals(styleColor) || "force".equals(styleColor)) {
            MessageUtils.setColorEnabled(true);
        } else if ("never".equals(styleColor) || "no".equals(styleColor) || "none".equals(styleColor)) {
            MessageUtils.setColorEnabled(false);
        } else if (!"auto".equals(styleColor) && !"tty".equals(styleColor) && !"if-tty".equals(styleColor)) {

    }
  }

  private interface Equals {
    @Override
    boolean equals(@Nullable Object obj);

    @Override
    int hashCode();

    @Override
    String toString();
  }

  private static class NoDelegateToEquals implements Equals {

    private static final Function<Equals, Equals> WRAPPER =
        new Function<Equals, Equals>() {
          @Override

    assertFalse(control("foo", 1).equals(entry("foo", 2)));
    assertFalse(entry("foo", 1).equals(control("bar", 1)));
    assertFalse(entry("foo", 1).equals(new Object()));
    assertFalse(entry("foo", 1).equals(null));
  }

  public void testEqualsNull() {
    assertEquals(control(NE, 1), entry(NE, 1));
    assertFalse(control(NE, 1).equals(entry(NE, 2)));
    assertFalse(entry(NE, 1).equals(control("bar", 1)));

    // Properties not covered by equals()
    assertThat(graphA.allowsSelfLoops()).isEqualTo(graphB.allowsSelfLoops());
    assertThat(graphA.nodeOrder()).isEqualTo(graphB.nodeOrder());

    assertThat(graphA).isEqualTo(graphB);
  }

  static void assertStronglyEquivalent(ValueGraph<?, ?> graphA, ValueGraph<?, ?> graphB) {
    // Properties not covered by equals()

    }
  }

  private interface Equals {
    @Override
    boolean equals(@Nullable Object obj);

    @Override
    int hashCode();

    @Override
    String toString();
  }

  private static class NoDelegateToEquals implements Equals {

    private static final Function<Equals, Equals> WRAPPER =
        new Function<Equals, Equals>() {
          @Override

    }

    @Override
    public boolean equals(@Nullable Object obj) {
      // In general getClass().isInstance() is bad for equals.
      // But here we fully control the subclasses to ensure symmetry.
      if (getClass().isInstance(obj)) {
        Wrapper that = (Wrapper) obj;
        return wrapped.equals(that.wrapped);
      }
      return false;
    }

    @Override

        }

        return Objects.equals(a1.getGroupId(), a2.getGroupId())
                && Objects.equals(a1.getArtifactId(), a2.getArtifactId())
                && Objects.equals(a1.getType(), a2.getType())
                && Objects.equals(a1.getVersion(), a2.getVersion())
                && Objects.equals(a1.getClassifier(), a2.getClassifier())
                && Objects.equals(a1.getScope(), a2.getScope())

    assertFalse(control("foo", 1).equals(entry("foo", 2)));
    assertFalse(entry("foo", 1).equals(control("bar", 1)));
    assertFalse(entry("foo", 1).equals(new Object()));
    assertFalse(entry("foo", 1).equals(null));
  }

  public void testEqualsNull() {
    assertEquals(control(NE, 1), entry(NE, 1));
    assertFalse(control(NE, 1).equals(entry(NE, 2)));
    assertFalse(entry(NE, 1).equals(control("bar", 1)));

                for (int j = i + 1; j < lines.size(); j++) {
                    String look = lines.get(j).trim();

                    if (look.equals("[.multi-language-sample]") || look.equals("====")) {
                        break; // stop at next sample or end of example block
                    }

                    if (sourceLang == null) {
                        String parsed = parseSourceLang(look);