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Groovy example source code file (PropertyMissingTest.groovy)

This example Groovy source code file (PropertyMissingTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

foo, groovytestcase, pmtest1, pmtest1, pmtest2, pmtest2, propertymissingtest, propertymissingtest, some_prop, string, string

The Groovy PropertyMissingTest.groovy source code

/*
 * Copyright 2003-2009 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 behaviour of the propertyMissing functionality of Groovy
 *
 * @author Graeme Rocher
 * @since 1.5
 */
class PropertyMissingTest extends GroovyTestCase {


    void testPropertyMissingWithMethods() {
         def t = new PMTest1()

        assertEquals "bar", t.foo
        t.foo = "changed"
        assertEquals "changed", t.foo

        assertNull t.bar
        t.bar = "keepme"

        assertEquals "keepme", t.bar
    }

    void testPropertyMissingViaMetaClass() {
        def store = [:]
        PMTest2.metaClass.propertyMissing = { String name ->
           store.name
        }
        PMTest2.metaClass.propertyMissing = { String name, value ->
           store.name = value
        }

        def t = new PMTest2()

       assertEquals "bar", t.foo
       t.foo = "changed"
       assertEquals "changed", t.foo
       assertNull t.bar
       t.bar = "keepme"

       assertEquals "keepme", t.bar

    }

    void testStaticPropertyMissingViaMetaClass() {

        shouldFail(MissingPropertyException) {
            PMTest1.SOME_PROP
        }

        PMTest1.metaClass.'static'.propertyMissing = { String name ->
            name
        }

        assertEquals "SOME_PROP", PMTest1.SOME_PROP
        assertEquals "FOO", PMTest1.FOO
    }

}

class PMTest1 {
    def store = [:]
    String foo = "bar"
    String propertyMissing(String name) {
        store.name
    }
    void propertyMissing(String name, value) {
        store.name = value
    }
}

class PMTest2 {
    String foo = "bar"
}

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