}

  public void testPermutationSetFourElements() {
    Iterator<List<Integer>> permutations =
        Collections2.permutations(newArrayList(1, 2, 3, 4)).iterator();
    assertNextPermutation(newArrayList(1, 2, 3, 4), permutations);
    assertNextPermutation(newArrayList(1, 2, 4, 3), permutations);
    assertNextPermutation(newArrayList(1, 4, 2, 3), permutations);

    serverWriter.writeMessageFrame(OPCODE_TEXT, payload)
    assertData("8105")
    assertData(payload)
  }

  @Test fun serverLargeBufferedPayloadWrittenAsOneFrame() {
    val length = 12345
    val payload: ByteString = (binaryData(length))
    serverWriter.writeMessageFrame(OPCODE_TEXT, payload)
    assertData("817e")
    assertData(format("%04x", length))
    assertData(payload)
  }

    }

    public void test_numberKeyObject() {
        Integer key = 12345;
        crawlerStatsHelper.begin(key);
        crawlerStatsHelper.record(key, "test_action");
        crawlerStatsHelper.done(key);

        String[] values = localLogMsg.get().split("\t");
        assertEquals(4, values.length);
        assertEquals("url:12345", values[0]);
        assertTrue(values[1].startsWith("time:"));

    assertEquals(string.substring(5), readFully(reader));
    assertFullyRead(reader);
  }

  public void testIllegalArguments() throws IOException {
    CharSequenceReader reader = new CharSequenceReader("12345");

    char[] buf = new char[10];
    assertThrows(IndexOutOfBoundsException.class, () -> reader.read(buf, 0, 11));

    assertThrows(IndexOutOfBoundsException.class, () -> reader.read(buf, 10, 1));

  }

  public void testInt() {
    Sink sink = new Sink(4);
    sink.putInt(0x04030201);
    HashCode unused = sink.hash();
    sink.assertInvariants(4);
    sink.assertBytes(new byte[] {1, 2, 3, 4});
  }

  public void testLong() {
    Sink sink = new Sink(8);
    sink.putLong(0x0807060504030201L);
    HashCode unused = sink.hash();
    sink.assertInvariants(8);

        assertTrue(result.isPresent());
        assertEquals(testValue, result.get());
    }

    public void test_ofNullable_withBigDecimal() {
        BigDecimal testValue = new BigDecimal("123.456");
        OptionalEntity<BigDecimal> result = OptionalUtil.ofNullable(testValue);

        assertNotNull(result);
        assertTrue(result.isPresent());
        assertEquals(testValue, result.get());
    }

        public String getIndexFieldFiletype() {
            return "filetype";
        }

        @Override
        public String getPasswordInvalidAdminPasswords() {
            return "admin,password,123456";
        }

        @Override
        public String getPluginVersionFilter() {
            return "";
        }

        @Override
        public String getPluginRepositories() {

    assertEquals("a:00;00:b", j.useForNull("00").join(mapWithNulls));

    StringBuilder sb = new StringBuilder();
    j.appendTo(sb, ImmutableMap.of(1, 2, 3, 4, 5, 6));
    assertEquals("1:2;3:4;5:6", sb.toString());
  }

  public void testEntries() {
    MapJoiner j = Joiner.on(";").withKeyValueSeparator(":");
    assertEquals("", j.join(ImmutableMultimap.of().entries()));

    // This sentence just isn't base64() encoded.
    assertFailsToDecode(base64(), "let's not talk of love or chains!");
    // A 4n+1 length string is never legal base64().
    assertFailsToDecode(base64(), "12345", "Invalid input length 5");
    // These have a combination of invalid length, unrecognized characters and wrong padding.
    assertFailsToDecode(base64(), "AB=C", "Unrecognized character: =");

  }

  private static ClassSanityTester.FactoryMethodReturnValueTester sanityTester() {
    return new ClassSanityTester()
        .setDefault(byte[].class, new byte[] {1, 2, 3, 4})
        .setDistinctValues(byte[].class, new byte[] {1, 2, 3, 4}, new byte[] {5, 6, 7, 8})
        .setDistinctValues(String.class, "7f8005ff0e", "7f8005ff0f")
        .forAllPublicStaticMethods(HashCode.class);
  }