/*
    * 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
    * the License.  You may obtain a copy of the License at
    *
    *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.jexl3;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertInstanceOf;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.StringWriter;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests that JXLT/template parsing enforces the engine's configured features
   * instead of silently falling back to JexlEngine.DEFAULT_FEATURES.
   * <p>(Feature-lockdown bypass: JexlParser.jxltParse used to discard the features
   * argument for the shared feature controller.)</p>
   */
  class JxltFeatureEnforcementTest {
  
      @Test
      void testTemplateScriptHonorsLoopFeature() {
          final JexlFeatures features = new JexlFeatures().loops(false);
          final JexlEngine jexl = new JexlBuilder().features(features).create();
          final JxltEngine jxlt = jexl.createJxltEngine();
          // template directives are parsed as a JEXL script; loops are disabled by the host
          assertThrows(JexlException.Feature.class,
              () -> jxlt.createTemplate("$$ while(true);\nhello"),
              "template script must honor the engine loop feature lockdown");
      }
  
      @Test
      void testJxltExpressionHonorsMethodCallFeature() {
          final JexlFeatures features = new JexlFeatures().methodCall(false);
          final JexlEngine jexl = new JexlBuilder().features(features).create();
          final JxltEngine jxlt = jexl.createJxltEngine();
          // createExpression wraps the parse failure into a JxltEngine.Exception
          final JxltEngine.Exception xjxlt = assertThrows(JxltEngine.Exception.class,
              () -> jxlt.createExpression("${'abc'.size()}"),
              "JXLT expression must honor the engine method-call feature lockdown");
          assertInstanceOf(JexlException.Feature.class, xjxlt.getCause());
      }
  
      @Test
      void testFeaturesRestoredAfterJxltParse() {
          // an engine with loops disabled
          final JexlFeatures features = new JexlFeatures().loops(false);
          final JexlEngine jexl = new JexlBuilder().features(features).create();
          final JxltEngine jxlt = jexl.createJxltEngine();
          assertThrows(JexlException.Feature.class, () -> jxlt.createTemplate("$$ for(var i : [1,2]) {}\nx"));
          // the shared feature controller must be restored: scripts still parse and are still controlled
          assertEquals(42, jexl.createScript("40 + 2").execute(null));
          assertThrows(JexlException.Feature.class, () -> jexl.createScript("while(true);"));
      }
  
      @Test
      void testPermissiveTemplateStillWorks() {
          // a permissive engine keeps working as before
          final JexlEngine jexl = new JexlBuilder().create();
          final JxltEngine jxlt = jexl.createJxltEngine();
          final JxltEngine.Template t = jxlt.createTemplate("$$ for(var i : [1,2]) {\nhello ${i}\n$$ }");
          assertNotNull(t);
          final StringWriter strw = new StringWriter();
          t.evaluate(new MapContext(), strw);
          assertEquals("hello 1\nhello 2\n", strw.toString());
      }
  }