params.put("test", "value");

        assertNull(queryRescorer.evaluate(params)); // First call - odd
        assertNotNull(queryRescorer.evaluate(params)); // Second call - even
        assertNull(queryRescorer.evaluate(params)); // Third call - odd
        assertNotNull(queryRescorer.evaluate(params)); // Fourth call - even
    }

    /**

    // Test evaluate method with empty template
    public void test_evaluate_withEmptyTemplate() {
        String template = "";
        Map<String, Object> paramMap = new HashMap<>();
        paramMap.put("key", "value");

        Object result = scriptEngine.evaluate(template, paramMap);
        assertEquals("", result);
    }

    // Test evaluate method with null template
    public void test_evaluate_withNullTemplate() {

        assertEquals(testScriptEngine, retrieved);
    }

    // Test evaluate with null parameters
    public void test_evaluate_nullParams() {
        Object result = testScriptEngine.evaluate("template", null);
        assertEquals("processed: template with params", result);
    }

    // Test evaluate with empty parameters
    public void test_evaluate_emptyParams() {

                return 50;
            }
        });

        Map<String, Object> params = new HashMap<>();
        params.put("param1", "value1");

        RescorerBuilder<?> result = ltrQueryRescorer.evaluate(params);
        assertNull(result);
    }

    public void test_evaluate_withNullModelName() {
        // Test when model name is null
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

        final Map<String, Object> params = new HashMap<>();
        assertNull(groovyEngine.evaluate("", params));
        assertEquals("", groovyEngine.evaluate("return ''", params));
        assertEquals(1, groovyEngine.evaluate("return 1", params));

        params.put("test", "123");
        assertEquals("123", groovyEngine.evaluate("return test", params));
    }

    public void test_getName() {

     * with parameters from the paramMap substituted into the template.
     *
     * @param template the template string to evaluate
     * @param paramMap the map of parameters to substitute into the template
     * @return the result of evaluating the template, or null if evaluation fails
     */
    Object evaluate(final String template, final Map<String, Object> paramMap);

        }

        @Override
        public Object evaluate(String template, Map<String, Object> paramMap) {
            return "TestEngine[" + identifier + "]: " + template;
        }
    }

    private static class CustomScriptEngine implements ScriptEngine {
        @Override
        public Object evaluate(String template, Map<String, Object> paramMap) {
            return "CustomEngine: " + template;

    public void test_execute_scriptEngineReturnsNull() {
        // Setup engine that returns null
        scriptEngineFactory.add("nullEngine", new ScriptEngine() {
            @Override
            public Object evaluate(String template, Map<String, Object> paramMap) {
                return null;
            }
        });

        // Execute and verify null result

     * The template is evaluated using the specified script engine with the value and context.
     *
     * @param dataMap the data map to modify
     * @param key the key to store the processed value under
     * @param value the original value to process
     * @param template the template script to evaluate
     * @param scriptType the type of script engine to use
     */

        if (value instanceof Boolean) {
            return (Boolean) value;
        }

        return false;
    }

    /**
     * Calculates the boost value for the given document data using the boost expression.
     * The method evaluates the boost expression and converts the result to a float value.