.addEqualityGroup(isOdd())
        .addEqualityGroup(Predicates.alwaysFalse())
        .testEquals();
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testAlwaysTrue_serialization() {
    checkSerialization(Predicates.alwaysTrue());
  }

  /*
   * Tests for Predicates.alwaysFalse().
   */

  public void testAlwaysFalse_apply() throws Exception {

        .addEqualityGroup(isOdd())
        .addEqualityGroup(Predicates.alwaysFalse())
        .testEquals();
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testAlwaysTrue_serialization() {
    checkSerialization(Predicates.alwaysTrue());
  }

  /*
   * Tests for Predicates.alwaysFalse().
   */

  public void testAlwaysFalse_apply() throws Exception {

    Function<Object, Boolean> alwaysFalse = Functions.forPredicate(Predicates.alwaysFalse());

    assertTrue(alwaysTrue.apply(0));
    assertFalse(alwaysFalse.apply(0));

    new EqualsTester()
        .addEqualityGroup(alwaysTrue, Functions.forPredicate(Predicates.alwaysTrue()))
        .addEqualityGroup(alwaysFalse)
        .addEqualityGroup(Functions.identity())
        .testEquals();

    Function<Object, Boolean> alwaysFalse = Functions.forPredicate(Predicates.alwaysFalse());

    assertTrue(alwaysTrue.apply(0));
    assertFalse(alwaysFalse.apply(0));

    new EqualsTester()
        .addEqualityGroup(alwaysTrue, Functions.forPredicate(Predicates.alwaysTrue()))
        .addEqualityGroup(alwaysFalse)
        .addEqualityGroup(Functions.identity())
        .testEquals();

  }

  public void testTryFind_alwaysFalse_orDefault() {
    Iterable<String> list = Lists.newArrayList("cool", "pants");
    Iterator<String> iterator = list.iterator();
    assertEquals("woot", Iterators.tryFind(iterator, Predicates.alwaysFalse()).or("woot"));
    assertFalse(iterator.hasNext());
  }

  public void testTryFind_alwaysFalse_isPresent() {

  }

  public void testTryFind_alwaysFalse_orDefault() {
    Iterable<String> list = Lists.newArrayList("cool", "pants");
    Iterator<String> iterator = list.iterator();
    assertEquals("woot", Iterators.tryFind(iterator, Predicates.alwaysFalse()).or("woot"));
    assertFalse(iterator.hasNext());
  }

  public void testTryFind_alwaysFalse_isPresent() {

public class CollectionRemoveIfTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
  public void testRemoveIf_alwaysFalse() {
    assertFalse("removeIf(x -> false) should return false", collection.removeIf(x -> false));
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)

  public void testReadLines_withLineProcessor() throws IOException {
    String text = "a\nb\nc";

    // Test a LineProcessor that always returns false.
    Reader r = new StringReader(text);
    LineProcessor<Integer> alwaysFalse =
        new LineProcessor<Integer>() {
          int seen;

          @Override
          public boolean processLine(String line) {
            seen++;
            return false;
          }

  public void testReadLines_withLineProcessor() throws IOException {
    String text = "a\nb\nc";

    // Test a LineProcessor that always returns false.
    Reader r = new StringReader(text);
    LineProcessor<Integer> alwaysFalse =
        new LineProcessor<Integer>() {
          int seen;

          @Override
          public boolean processLine(String line) {
            seen++;
            return false;
          }

        return "Predicates.alwaysTrue()";
      }
    },
    /** @see Predicates#alwaysFalse() */
    ALWAYS_FALSE {
      @Override
      public boolean apply(@CheckForNull Object o) {
        return false;
      }

      @Override
      public String toString() {
        return "Predicates.alwaysFalse()";
      }
    },
    /** @see Predicates#isNull() */
    IS_NULL {
      @Override