}
    }

    @Test
    public void test_writeThreadDump_withInvalidPath() {
        // Test with invalid file path (directory that doesn't exist)
        String invalidPath = "/nonexistent/directory/thread-dump.txt";

        try {
            ThreadDumpUtil.writeThreadDump(invalidPath);
            // Should not throw exception but log warning
        } catch (Exception e) {

    }

    @Test
    public void test_getMatchedLabelValueSet_emptyPatternList() {
        // Test with empty pattern list
        Set<String> result = labelTypeHelper.getMatchedLabelValueSet("/nonexistent/path");
        assertNotNull(result);
    }

    @Test
    public void test_getMatchedLabelValueSet_nullPath() {
        try {
            labelTypeHelper.getMatchedLabelValueSet(null);

    @Test
    public void test_getParamValueArray_withNullParam() {
        MockHttpServletRequest request = new MockHttpServletRequest();
        String[] result = SearchRequestParams.getParamValueArray(request, "nonexistent");
        assertEquals(0, result.length);
    }

    @Test
    public void test_getParamValueArray_withBlankValues() {
        MockHttpServletRequest request = new MockHttpServletRequest();

        ComponentUtil.register(mockJobManager, JobManager.class.getCanonicalName());

        final ScheduledJob scheduledJob = new ScheduledJob();
        scheduledJob.setId("nonexistent-job");

        try {
            scheduledJob.start(Map.of(Constants.JOB_LOG_ID, "some-id"));
            fail("Expected JobNotFoundException");
        } catch (final JobNotFoundException e) {

    }

    @Test
    public void test_getMapValue_missing() {
        final Map<String, Object> map = Map.of("key", "value");
        assertNull(coordinatorHelper.getMapValue(map, "nonexistent"));
    }

    @Test
    public void test_getListValue_exists() {
        final List<Map<String, Object>> list = List.of(Map.of("id", "1"), Map.of("id", "2"));

        chatClient.setSearchResults(Collections.emptyList());
        chatClient.resetSearchDocumentsCalled();

        final List<Map<String, Object>> result = chatClient.testSearchWithQuery("nonexistent");
        assertTrue(result.isEmpty());
    }

    // ========== Testable subclass ==========

    static class TestableChatClient extends ChatClient {