Iterator<String> iterator = asList("one", "two").iterator();
    IllegalArgumentException expected =
        assertThrows(IllegalArgumentException.class, () -> getOnlyElement(iterator));
    assertThat(expected).hasMessageThat().isEqualTo("expected one element but was: <one, two>");
  }

  public void testGetOnlyElement_noDefault_fiveElements() {

		arn, err := ParseARN(testCase.s)
		expectErr := (err != nil)

		if expectErr != testCase.expectErr {
			t.Fatalf("test %v: error: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
		}

		if !testCase.expectErr {
			if *arn != *testCase.expectedARN {
				t.Fatalf("test %v: data: expected: %v, got: %v", i+1, testCase.expectedARN, arn)
			}
		}
	}

    String msg =
        "Alphanumeric characters are always 'safe' " + "and should not be explicitly specified";
    IllegalArgumentException expected =
        assertThrows(IllegalArgumentException.class, () -> new PercentEscaper("-+#abc.!", false));
    assertThat(expected).hasMessageThat().isEqualTo(msg);
  }

  public void testBadArguments_plusforspace() {
    // space can be a safe char if plusForSpace is false

          call.executeAsync().use {
            withContext(Dispatchers.IO) {
              it.body.string()
            }
            fail("No expected to get response")
          }
        }
      } catch (to: TimeoutCancellationException) {
        // expected
      }

      assertThat(call.isCanceled()).isTrue()
    }
  }

  @Test
  fun cancelledCall() {
    runTest {

      assertTrue(hp.hasPort());
      assertEquals(expectPort, hp.getPort());
    } else {
      assertFalse(hp.hasPort());
      try {
        hp.getPort();
        fail("Expected IllegalStateException");
      } catch (IllegalStateException expected) {
      }
    }
    assertEquals(expectHost, hp.getHost());

    // Check the post-withDefaultPort() instance (if any).
    if (!badDefaultPort) {
      try {

        String value;
        String expect;

        value = null;
        expect = "";
        assertEquals(expect, ParameterUtil.encrypt(value));

        value = "";
        expect = "";
        assertEquals(expect, ParameterUtil.encrypt(value));

        value = "\n";
        expect = "";
        assertEquals(expect, ParameterUtil.encrypt(value));

        value = "=";

    E[] array = createArrayWithNullElement();
    collection = getSubjectGenerator().create(array);
    assertTrue("add(nullPresent) should return true", getList().add(null));

    List<E> expected = copyToList(array);
    expected.add(null);
    expectContents(expected);
  }

  /**
   * Returns the {@link Method} instance for {@link #testAdd_supportedNullPresent()} so that tests

			if err != nil {
				gotErr := err.(BatchJobYamlErr)
				testErr := test.err.(BatchJobYamlErr)
				if gotErr.message() != testErr.message() {
					t.Fatalf("Expected %v but got %v", test.err, err)
				}
			}
			if err == nil && test.err != nil {
				t.Fatalf("Expected %v but got nil", test.err)
			}
		})
	}

      getResponse(newRequest("/foo"))
    }.also { expected ->
      when (expected) {
        is SSLHandshakeException -> {
          // Allow conscrypt to fail in different ways
          if (!platform.isConscrypt()) {
            assertThat(expected.cause!!).isInstanceOf<CertificateException>()
          }
        }
        is TlsFatalAlert -> {}
        else -> throw expected
      }
    }

 * supported. The elements can be any objects.
 *
 * <p>{@code contains(x)}, {@code add(x)} and {@code remove(x)}, are all (expected and amortized)
 * constant time operations. Expected in the hashtable sense (depends on the hash function doing a
 * good job of distributing the elements to the buckets to a distribution not far from uniform), and