LazyExpressionTest.java

/*
 * Copyright 2010 Lincoln Baxter, III
 * 
 * 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 com.ocpsoft.pretty.faces.el;

import static org.junit.Assert.assertEquals;

import org.easymock.classextension.EasyMock;
import org.junit.Test;

public class LazyExpressionTest
{

   @Test
   public void testSimpleLazyExpression()
   {

      // prepare LazyBeanNameFinder mock
      LazyBeanNameFinder beanNameFinder = EasyMock.createNiceMock(LazyBeanNameFinder.class);
      EasyMock.expect(beanNameFinder.findBeanName(SomeTestBean.class)).andReturn("someTestBean").once();
      EasyMock.replay(beanNameFinder);

      // create expression and evaluate it twice (to check LazyBeanNameFinder is called only once)
      PrettyExpression expr = new LazyExpression(beanNameFinder, SomeTestBean.class, "property");
      assertEquals("#{someTestBean.property}", expr.getELExpression());
      assertEquals("#{someTestBean.property}", expr.getELExpression());

      // verify mock
      EasyMock.verify(beanNameFinder);

   }

   @Test(expected = IllegalStateException.class)
   public void testUnresolvableLazyExpression()
   {

      // prepare LazyBeanNameFinder mock
      LazyBeanNameFinder beanNameFinder = EasyMock.createNiceMock(LazyBeanNameFinder.class);
      EasyMock.expect(beanNameFinder.findBeanName(SomeTestBean.class)).andThrow(new IllegalStateException()).once();
      EasyMock.replay(beanNameFinder);

      // this call will fail, because LazyBeanNameFinder will throw an IllegalStateException
      PrettyExpression expr = new LazyExpression(beanNameFinder, SomeTestBean.class, "property");
      expr.getELExpression();
   }

   /**
    * Simple test class
    */
   public class SomeTestBean
   {

   }

}