}

  public void testOnlyElementMultiple() {
    IllegalArgumentException expected =
        assertThrows(IllegalArgumentException.class, () -> Stream.of(1, 2).collect(onlyElement()));
    assertThat(expected.getMessage()).contains("1, 2");
  }

  public void testOnlyElementMany() {
    IllegalArgumentException expected =
        assertThrows(
            IllegalArgumentException.class,

			}

			switch {
			case test.expectedErr == nil:
				if err != nil {
					t.Errorf("error: expected = <nil>, got = %v", err)
				}
			case err == nil:
				t.Errorf("error: expected = %v, got = <nil>", test.expectedErr)
			case test.expectedErr.Error() != err.Error():
				t.Errorf("error: expected = %v, got = %v", test.expectedErr, err)
			}

			if err == nil {

            .add("field2", "value2");
    final String expected = "TestClass{field1=1, value1, field2=value2}";

    assertEquals(expected, helper.toString());
    // Call toString again
    assertEquals(expected, helper.toString());

    // Make sure the cached value is reset when we modify the helper at all
    final String expected2 = "TestClass{field1=1, value1, field2=value2, 2}";
    helper.addValue(2);

			err := listTags(context.Background(), client, &out)
			if tc.error == "" && err != nil {
				t.Fatalf("expected no error, got %v", err)
			}
			if tc.error != "" {
				if err == nil {
					t.Fatalf("expected error to include \"%s\" but got none", tc.error)
				}
				if !strings.Contains(err.Error(), tc.error) {
					t.Fatalf("expected \"%s\" in error, got %v", tc.error, err)
				}
			}

			commandOutput := out.String()

			t.Errorf("Test case %d: Expected \"%v\" but failed \"%v\"", i+1, testCase.sipHash, sipHashElement)
		}
	}

	if sipHashElement := hashKey("SIPMOD", "This will fail", -1, testUUID); sipHashElement != -1 {
		t.Errorf("Test: Expected \"-1\" but got \"%v\"", sipHashElement)
	}

              + "expected = "
              + expected
              + ", actual = "
              + actual);
    }
  }

  public static void assertContentsInOrder(Iterable<?> actual, Object... expected) {
    assertEqualInOrder(asList(expected), actual);
  }

  public static void assertEqualIgnoringOrder(Iterable<?> expected, Iterable<?> actual) {

    int i = 0;
    while (expectedIterator.hasNext()) {
      Object expected = expectedIterator.next();

      assertTrue(
          "index " + i + " expected <" + expected + "., actual is exhausted",
          actualIterator.hasNext());

      Object actual = actualIterator.next();
      assertEquals("index " + i, expected, actual);
      i++;
    }
    if (actualIterator.hasNext()) {

    for (long value : TEST_LONGS) {
      BigInteger expected =
          (value >= 0)
              ? BigInteger.valueOf(value)
              : BigInteger.valueOf(value).add(BigInteger.ZERO.setBit(64));
      assertWithMessage(UnsignedLongs.toString(value))
          .that(UnsignedLong.fromLongBits(value).bigIntegerValue())
          .isEqualTo(expected);
    }
  }

  public void testValueOfLong() {

    }

    try {
      assertContentsInOrder(list, "a", "c", "b");
      throw new Error();
    } catch (AssertionFailedError expected) {
    }

    try {
      assertContentsInOrder(list, "a", "B", "c");
      throw new Error();
    } catch (AssertionFailedError expected) {
    }
  }

  public void testAssertContains() {
    List<?> list = asList("a", "b");

    }

    try {
      assertContentsInOrder(list, "a", "c", "b");
      throw new Error();
    } catch (AssertionFailedError expected) {
    }

    try {
      assertContentsInOrder(list, "a", "B", "c");
      throw new Error();
    } catch (AssertionFailedError expected) {
    }
  }

  public void testAssertContains() {
    List<?> list = asList("a", "b");