assertThat(Chars.join(",", EMPTY)).isEmpty();
    assertThat(Chars.join(",", '1')).isEqualTo("1");
    assertThat(Chars.join(",", '1', '2')).isEqualTo("1,2");
    assertThat(Chars.join("", '1', '2', '3')).isEqualTo("123");
  }

  public void testLexicographicalComparator() {
    List<char[]> ordered =
        Arrays.asList(
            new char[] {},
            new char[] {LEAST},

        ;
        includeFilter = container.getComponent("includeFilter");
        includeFilter.setIncludeFilteringPattern("$1$2$3.*");
        excludeFilter = container.getComponent("excludeFilter");
        excludeFilter.setExcludeFilteringPattern("$1$2$3.*");
        domainFilter = container.getComponent("domainFilter");
        domainFilter.setIncludeFilteringPattern("http://$2/.*");

            ("if-modified-since", "yesterday"),
            ("traceparent", "123"),
            ("x-tag", "one"),
            ("x-tag", "two"),
        ],
    )
    assert response.status_code == 200
    assert response.json() == {
        "host": "testserver",
        "save_data": True,
        "if_modified_since": "yesterday",
        "traceparent": "123",
        "x_tag": ["one", "two"],
    }

        when(src.export()).thenReturn(buildExportName(new Oid("1.2.3"), "client"));
        when(targ.export()).thenReturn(buildExportName(new Oid("1.2.3"), "service"));
        when(gssContext.getSrcName()).thenReturn(src);
        when(gssContext.getTargName()).thenReturn(targ);
        when(gssContext.getMech()).thenReturn(new Oid("1.2.3"));

        assertNull(ctx.searchSessionKey(new javax.security.auth.Subject()));

  }

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

        WitnessRegisterResponse mockResponse = mock(WitnessRegisterResponse.class);
        lenient().when(mockResponse.isSuccess()).thenReturn(true);
        lenient().when(mockResponse.getRegistrationId()).thenReturn("test-reg-123");

        WitnessRpcClient mockRpc = mock(WitnessRpcClient.class);
        lenient().when(mockRpc.register(any(WitnessRegisterRequest.class))).thenReturn(mockResponse);

        intResult.setId(42);
        assertEquals(Integer.valueOf(42), intResult.getId());

        AccessResultImpl<String> stringResult = new AccessResultImpl<>();
        stringResult.setId("result-id-123");
        assertEquals("result-id-123", stringResult.getId());

        AccessResultImpl<Long> longResult = new AccessResultImpl<>();
        longResult.setId(987654321L);
        assertEquals(Long.valueOf(987654321L), longResult.getId());

    assertThrows(NullPointerException.class, () -> builder.put(null, 1));
    assertThrows(NullPointerException.class, () -> builder.putAll(null, Arrays.asList(1, 2, 3)));
    assertThrows(NullPointerException.class, () -> builder.putAll(null, 1, 2, 3));
    assertThrows(
        NullPointerException.class, () -> builder.putAll((Multimap<String, Integer>) toPut));
  }

  public void testBuilderPutNullValue() {

- [CHANGELOG-1.27.md](./CHANGELOG-1.27.md)
- [CHANGELOG-1.26.md](./CHANGELOG-1.26.md)
- [CHANGELOG-1.25.md](./CHANGELOG-1.25.md)
- [CHANGELOG-1.24.md](./CHANGELOG-1.24.md)
- [CHANGELOG-1.23.md](./CHANGELOG-1.23.md)
- [CHANGELOG-1.22.md](./CHANGELOG-1.22.md)
- [CHANGELOG-1.21.md](./CHANGELOG-1.21.md)
- [CHANGELOG-1.20.md](./CHANGELOG-1.20.md)
- [CHANGELOG-1.19.md](./CHANGELOG-1.19.md)

        ASN1Integer expected = new ASN1Integer(123);
        vector.add(expected);
        ASN1Integer result = ASN1Util.as(ASN1Integer.class, vector.elements());
        assertSame(expected, result);
    }

    @Test
    void testAs_Enumeration_Failure() {
        // Test failed casting from enumeration
        Vector<ASN1Integer> vector = new Vector<>();
        vector.add(new ASN1Integer(123));