src/test/groovy/lang/WithMethodTest.groovy

/*
 * Copyright 2003-2008 the original author or authors.
 *
 * 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 groovy.lang

/**
 * Tests the .with method
 *
 */
 class WithMethodTest extends GroovyTestCase {
     
     void testDelegateGetsFirstOpportunity() {
         def sb = new StringBuffer()

         sb.with {
             // this should call append() on the 
             // delegate not, the owner
             append 'some text'
         }
         
         assertEquals 'delegate had wrong value', 'some text', sb.toString()
     }
     
     void testOwnerGetsOpportunityIfDelegateCannotRespond() {
         def sb = new StringBuffer()
         
         def returnValue
         
         sb.with {
             // this should call ownerMethod() on the owner
             returnValue = ownerMethod()
         }
         
         assertEquals 'owner should have responded to method call', 
                      42, 
                      returnValue
     }
     
     void testCallingNonExistentMethod() {
         def sb = new StringBuffer()
         
         shouldFail(MissingMethodException) {
             sb.with {
                 someNoneExistentMethod()
             }
         }
     }
     
     void testClosureWithResolveStrategyExplicitlySet() {
         def closure = {
             append 'some text'
         }
         closure.resolveStrategy = Closure.OWNER_ONLY
         
         def sb = new StringBuffer()
         
         // .with should use DELEGATE_FIRST, even though
         // the closure has another strategy set
         sb.with closure
         
         assertEquals 'delegate had wrong value', 'some text', sb.toString()
     }
     
     def ownerMethod() {
         42
     }
     
     void append(String s) {
         fail 'this should never have been called'
     }
 }