*
   * @param escaper the non-null escaper to test
   */
  public static void assertBasic(Escaper escaper) throws IOException {
    // Escapers operate on characters: no characters, no escaping.
    Assert.assertEquals("", escaper.escape(""));
    // Assert that escapers throw null pointer exceptions.
    try {
      escaper.escape((String) null);
      Assert.fail("exception not thrown when escaping a null string");

   *
   * @param escaper the non-null escaper to test
   */
  public static void assertBasic(Escaper escaper) throws IOException {
    // Escapers operate on characters: no characters, no escaping.
    Assert.assertEquals("", escaper.escape(""));
    // Assert that escapers throw null pointer exceptions.
    try {
      escaper.escape((String) null);
      Assert.fail("exception not thrown when escaping a null string");

  public void testInstantiate_noConstantEnum() throws Exception {
    assertThat(tester.instantiate(NoConstantEnum.class)).isNull();
  }

  public void testInstantiate_oneConstantEnum() throws Exception {
    assertEquals(OneConstantEnum.A, tester.instantiate(OneConstantEnum.class));
  }

  public void testInstantiate_interface() throws Exception {
    assertThat(tester.instantiate(Runnable.class)).isNull();
  }

        Assertions.assertTrue(invokerRequest.userProperties().containsKey("user.property"));
        Assertions.assertEquals("yes it is", invokerRequest.userProperties().get("user.property"));

        // maven installation
        Assertions.assertTrue(invokerRequest.systemProperties().containsKey("maven.property"));
        Assertions.assertEquals("yes it is", invokerRequest.systemProperties().get("maven.property"));
    }

    @Test

        given:
        file("src/test/java/acme/SomeTests.java").text = """

        public class SomeTests {
            @org.junit.Test
            public void testSysInput() {
                org.junit.Assert.assertEquals("bar", System.getProperty("foo"));
            }
        }

        """
        buildFile.text = """
            plugins {
             id 'java'
             id 'elasticsearch.test-base'
            }

  public void assertSuccess(Object expectedData) throws Throwable {
    // Verify that the listener executed in a reasonable amount of time.
    Assert.assertTrue(countDownLatch.await(1L, SECONDS));

    try {
      Assert.assertEquals(expectedData, future.get());
    } catch (ExecutionException e) {
      throw e.getCause();
    }
  }

  /**
   * Verify that the listener completes in a reasonable amount of time, and Asserts that the future

      println("Protocol ${response.version}")
      println("Response ${response.code}")
      println("${response.body.bodyText.substring(0, 20)}...")

      Assert.assertEquals(ProtocolVersion("HTTP", 2, 0), response.version)
    }
  }
}

object LoggingCallback : FutureCallback<SimpleHttpResponse> {
  override fun completed(response: SimpleHttpResponse) {
  }

  public void assertSuccess(Object expectedData) throws Throwable {
    // Verify that the listener executed in a reasonable amount of time.
    Assert.assertTrue(countDownLatch.await(1L, SECONDS));

    try {
      Assert.assertEquals(expectedData, future.get());
    } catch (ExecutionException e) {
      throw e.getCause();
    }
  }

  /**
   * Verify that the listener completes in a reasonable amount of time, and Asserts that the future

   */
  @CanIgnoreReturnValue
  public static <T> T reserializeAndAssert(T object) {
    T copy = reserialize(object);
    new EqualsTester().addEqualityGroup(object, copy).testEquals();
    Assert.assertEquals(object.getClass(), copy.getClass());
    return copy;
  }

        .forwardOutput()
        .withArguments(*args)


    protected
    fun assertChangesProperlyOrdered() {
        val result = run(":verifyAcceptedApiChangesOrdering").build()
        Assertions.assertEquals(TaskOutcome.SUCCESS, result.task(":verifyAcceptedApiChangesOrdering")!!.outcome)
    }

    protected
    fun assertHasMisorderedChanges(changes: List<Change>? = null) {
        val standardError = StringWriter()