content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * Licensed 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
   *
   *     http://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.activiti.core.el.juel.extensions;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import jakarta.el.ELContext;
  import jakarta.el.ExpressionFactory;
  import jakarta.el.ValueExpression;
  import java.util.HashMap;
  import java.util.Map;
  import org.activiti.core.el.juel.ExpressionFactoryImpl;
  import org.activiti.core.el.juel.util.SimpleContext;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.Test;
  
  public class NullPropertiesTest {
  
      @AfterEach
      public void afterEach() {
          System.clearProperty("activiti.juel.nullProperties");
      }
  
      @Test
      public void tesNullProperties() {
          // create our factory which uses our customized builder
          System.setProperty("activiti.juel.nullProperties", "true");
          ExpressionFactory f = new ExpressionFactoryImpl(System.getProperties());
  
          // create our context
          ELContext context = new SimpleContext();
  
          // create our expression we want to evaluate
          ValueExpression e = f.createValueExpression(context, "${map[null]}", String.class);
  
          // create a map containing a value for key <code>null</code> and make it available
          Map<String, String> map = new HashMap<String, String>();
          map.put(null, "foo");
          context.getELResolver().setValue(context, null, "map", map);
  
          // let's go...
          assertEquals(e.getValue(context), "foo"); // --> "foo"
      }
  
      @Test
      public void tesNullPropertiesDisabled() {
          // create our factory
          System.setProperty("activiti.juel.nullProperties", "false");
          ExpressionFactory f = new ExpressionFactoryImpl(System.getProperties());
  
          // create our context
          ELContext context = new SimpleContext();
  
          // create our expression we want to evaluate
          ValueExpression e = f.createValueExpression(context, "${map[null]}", String.class);
  
          // create a map containing a value for key <code>null</code> and make it available
          Map<String, String> map = new HashMap<String, String>();
          map.put(null, "foo");
          context.getELResolver().setValue(context, null, "map", map);
  
          // let's go...
          assertEquals("", e.getValue(context)); // --> "foo"
      }
  }
  