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
    @Test
    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
    @Test

        assertEquals(testScriptEngine, retrieved);
    }

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

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

        assertNull(groovyEngine.evaluate("\n", params));
        assertNull(groovyEngine.evaluate("  \t\n  ", params));
    }

    /**
     * Test that evaluate handles null paramMap safely
     */
    @Test
    public void test_evaluate_nullParamMap() {
        assertEquals("test", groovyEngine.evaluate("return 'test'", null));
        assertEquals(123, groovyEngine.evaluate("return 123", null));
    }

    /**

    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

    String PHASE_EVALUATE = "evaluate";

    /** Phase name for content retrieval */
    String PHASE_FETCH = "fetch";

    /** Phase name for answer generation */
    String PHASE_ANSWER = "answer";

    /**
     * Called when a processing phase starts.
     *
     * @param phase the phase name (e.g., "intent", "search", "evaluate", "fetch", "answer")

 *
 * <p>Thread Safety: This class is thread-safe. Each cached entry holds its own
 * GroovyClassLoader. The cache uses Guava Cache with segment-based locking for
 * lock-free concurrent reads. Each evaluate() call creates a new Script instance
 * to ensure thread isolation of bindings.</p>
 *
 * <p>Note on class-level isolation: Compiled Script classes are cached and reused.

     * 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.

    @Test
    public void test_phaseConstants() {
        assertEquals("intent", ChatPhaseCallback.PHASE_INTENT);
        assertEquals("search", ChatPhaseCallback.PHASE_SEARCH);
        assertEquals("evaluate", ChatPhaseCallback.PHASE_EVALUATE);
        assertEquals("fetch", ChatPhaseCallback.PHASE_FETCH);
        assertEquals("answer", ChatPhaseCallback.PHASE_ANSWER);
    }

    @Test