indexUpdater.finishCrawling = true;
        indexUpdater.destroy();
        // finishCrawling should be set when max empty list count is exceeded
        // In test environment this may not work as expected
        // assertTrue(indexUpdater.finishCrawling);
    }

    // Test addFinishedSessionId
    @Test
    public void test_addFinishedSessionId() {
        final String sessionId = "session123";

        // Test that the exception has the correct serialVersionUID field
        ScriptEngineException exception = new ScriptEngineException("Serialization test");

        // Verify the exception can be created and basic properties work
        assertNotNull(exception);
        assertEquals("Serialization test", exception.getMessage());
    }

    @Test
    public void test_stackTrace() {
        // Test that stack trace is properly maintained

        // we'll test the class behavior through unit tests that verify the logic
        // The actual integration with ClusterHealthResponse is tested in integration tests

        // Test that the constructor and getters work with proper setup
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public Set<String> getApiPingEsFieldSet() {

        ScriptEngine retrievedByClass = scriptEngineFactory.getScriptEngine("testscriptengine");
        assertEquals(engine2, retrievedByClass);

        // But original names should still work
        assertEquals(engine1, scriptEngineFactory.getScriptEngine("name1"));
        assertEquals(engine2, scriptEngineFactory.getScriptEngine("name2"));
    }

    // Test with engine that has very long class name

 */
package org.codelibs.fess.util;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with

        assertFalse(validator.isValid("too many fields * * * * * * *", context));
        assertFalse(validator.isValid("* * * *", context));
    }

    // Test common valid cron patterns that are likely to work
    @Test
    public void test_basicValidCronExpressions() {
        final ConstraintValidatorContext context = null;

        // Test basic patterns that should be valid

        assertTrue(exception3.getCause() instanceof RuntimeException);
    }

    @Test
    public void test_constructorWithThrowableCause_NullError() {
        // Test with null Error (should work same as null Exception)
        String message = "SSO login error with null cause";
        Error nullError = null;
        SsoLoginException exception = new SsoLoginException(message, nullError);

    }

    @Test
    public void test_intervalRule_isTarget_invalidDays() {
        IntervalRule rule = new IntervalRule("10:00", "18:00", "1,invalid,3", 1000);

        // Should still work with valid days
        assertTrue(rule.isTarget(12, 30, 1)); // 12:30 on Sunday
        assertTrue(rule.isTarget(12, 30, 3)); // 12:30 on Tuesday
        assertFalse(rule.isTarget(12, 30, 2)); // 12:30 on Monday
    }

    @Test
    public void test_multipleRegistrations() {
        testScriptEngine.register();
        testScriptEngine.register(); // Register again

        // Should still work without errors
        ScriptEngine retrieved = scriptEngineFactory.getScriptEngine("testEngine");
        assertNotNull(retrieved);
        assertEquals(testScriptEngine, retrieved);
    }

            // Test with special characters in message
            WebApiUtil.setError(400, "Error with special chars: àáâãäåæçèéêë ñ 中文 🚀");

        } catch (Exception e) {
            fail("Error handling should work with edge cases: " + e.getMessage());
        }
    }

    @Test
    public void test_method_parameter_validation() {
        // Test that methods handle parameter validation appropriately