Integer newValue = map.getInstance(Integer.class);
    assertEquals(7, (int) newValue);

    // Won't compile: map.putInstance(Double.class, new Long(42));
  }

  public void testNull() {
    assertThrows(NullPointerException.class, () -> map.put(null, new Integer(1)));
    map.putInstance(Integer.class, null);
    assertThat(map.get(Integer.class)).isNull();

        .build();
  }

  private static Iterable<Striped<?>> allImplementations() {
    return concat(strongImplementations(), weakImplementations());
  }

  public void testNull() throws Exception {
    for (Striped<?> striped : allImplementations()) {
      new NullPointerTester().testAllPublicInstanceMethods(striped);
    }
  }

  public void testSizes() {

        .build();
  }

  private static Iterable<Striped<?>> allImplementations() {
    return concat(strongImplementations(), weakImplementations());
  }

  public void testNull() throws Exception {
    for (Striped<?> striped : allImplementations()) {
      new NullPointerTester().testAllPublicInstanceMethods(striped);
    }
  }

  public void testSizes() {

  /* The names of the expected method that tests null checks. */
  private static final ImmutableList<String> NULL_TEST_METHOD_NAMES =
      ImmutableList.of(
          "testNulls", "testNull",
          "testNullPointers", "testNullPointer",
          "testNullPointerExceptions", "testNullPointerException");

  /* The names of the expected method that tests serializable. */

  /* The names of the expected method that tests null checks. */
  private static final ImmutableList<String> NULL_TEST_METHOD_NAMES =
      ImmutableList.of(
          "testNulls", "testNull",
          "testNullPointers", "testNullPointer",
          "testNullPointerExceptions", "testNullPointerException");

  /* The names of the expected method that tests serializable. */

    doTestEmpty(noneOf("CharMatcher"));
    doTestEmpty(inRange('n', 'q'));
    doTestEmpty(forPredicate(Predicates.equalTo('c')));
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNull() throws Exception {
    doTestNull(CharMatcher.any());
    doTestNull(CharMatcher.none());
    doTestNull(is('a'));
    doTestNull(isNot('a'));
    doTestNull(anyOf(""));
    doTestNull(anyOf("x"));

        // Rerun test to work around Marshamallow class-loading issue b/456222735.
        super.runBare();
        return;
      }
      throw e;
    }
  }

  public void testNull() throws Exception {
    new NullPointerTester()
        .setDefault(CountDownLatch.class, new CountDownLatch(0))
        .setDefault(Semaphore.class, new Semaphore(999))

        // Rerun test to work around Marshamallow class-loading issue b/456222735.
        super.runBare();
        return;
      }
      throw e;
    }
  }

  public void testNull() throws Exception {
    new NullPointerTester()
        .setDefault(CountDownLatch.class, new CountDownLatch(0))
        .setDefault(Semaphore.class, new Semaphore(999))

  }

  public void testNulls_enum() throws Exception {
    tester.testNulls(OneConstantEnum.class);
    tester.testNulls(NoConstantEnum.class);
    tester.testNulls(TimeUnit.class);
  }

  public void testNulls_parameterOptionalNotInstantiable() throws Exception {
    tester.testNulls(ConstructorParameterWithOptionalNotInstantiable.class);
  }

    assertThat(generator.generateFresh(Currency.class)).isNotNull();
  }

  public void testNulls() throws Exception {
    new ClassSanityTester()
        .setDefault(Method.class, FreshValueGeneratorTest.class.getDeclaredMethod("testNulls"))
        .testNulls(FreshValueGenerator.class);
  }

  private static void assertFreshInstances(Class<?>... types) {
    for (Class<?> type : types) {