assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withSpecialCharacters() {
        // Test with special characters in message
        String message = "Search not supported: \n\t!@#$%^&*(){}[]|\\:;\"'<>,.?/~`";

        assertNotNull(exception);
        assertEquals("User is not found: null", exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withSpecialCharacters() {
        // Test with username containing special characters
        String username = "******@****.***";
        FessUserNotFoundException exception = new FessUserNotFoundException(username);

        assertEquals(type, exception.getType());
        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withSpecialCharacters() {
        // Test constructor with special characters
        String type = "Token-Type_123!@#";
        String message = "Error: Token contains special characters <>&\"'";

        assertNull(param.getValues()[1]);
        assertEquals("value3", param.getValues()[2]);
        assertNull(param.getValues()[3]);
    }

    @Test
    public void test_constructor_withSpecialCharacters() {
        // Test with special characters in name and values
        String name = "param-name_123!@#";
        String[] values = { "value with spaces", "value@special#chars", "日本語" };

Shinsuke Sugaya <******@****.***> 1773442886 +0900

Shinsuke Sugaya <******@****.***> 1773442886 +0900

Shinsuke Sugaya <******@****.***> 1773442886 +0900

Shinsuke Sugaya <******@****.***> 1773442886 +0900

Shinsuke Sugaya <******@****.***> 1773442886 +0900

Shinsuke Sugaya <******@****.***> 1773442886 +0900