Groovy example source code file (MethodMissingTest.groovy)

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Java - Groovy tags/keywords

groovytestcase, methodmissingtest, mmtest, mmtest, mmtest2, mmtest2, mmtest3, mmtest5, mmtest5, mmtest6, string, string

The Groovy MethodMissingTest.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 for method missing handling in Groovy

 * @author Graeme Rocher
 * @since 1.5
 */
class MethodMissingTest extends GroovyTestCase {

    void testOverrideStaticMethodMissingTwice() {
        MMTest2.metaClass.'static'.methodMissing = { String name, args -> "foo" }
        assertEquals "foo",MMTest2.doStuff()
        MMTest2.metaClass.'static'.methodMissing = { String name, args -> "bar" }
        assertEquals "bar",MMTest2.doStuff()
    }

    void testSimpleMethodMissing() {
        def t = new MMTest()
        assertEquals "world", t.hello()
        assertEquals "foo", t.stuff()
    }

    void testMethodMissingViaMetaClass() {
        def t1 = new MMTest2()
        shouldFail(MissingMethodException) {
            t1.stuff()
        }
        assertEquals "world", t1.hello()
        MMTest2.metaClass.methodMissing = { String name, args ->
            "foo"
        }
        def t2 = new MMTest2()
        assertEquals "world", t2.hello()
        assertEquals "foo", t2.stuff()
    }

    void testMethodMissingWithRegistration() {
        MMTest2.metaClass.methodMissing = { String name, args ->
             MMTest2.metaClass."$name" = {-> "bar" }        
            "foo"
        }
        def t2 = new MMTest2()
        assertEquals "world", t2.hello()
        assertEquals "foo", t2.stuff()
        assertEquals "bar", t2.stuff()

    }


    void testStaticMethodMissingViaMetaClass() {

        assertEquals "world", MMTest3.hello()
        shouldFail(MissingMethodException) {
            MMTest3.stuff()            
        }
        MMTest3.metaClass.'static'.methodMissing = { String name, args->
             "foo"
        }

        assertEquals "world", MMTest3.hello()
        assertEquals "foo", MMTest3.stuff()
    }

    void testMethodMissingWithInheritance() {
         assertEquals "world",MMTest6.hello()
         assertEquals "cruel world",MMTest6.goodbye()

         MMTest6.metaClass.'static'.methodMissing = { String name, args ->
            "foo"
         }
         assertEquals "foo",MMTest6.bar()

         shouldFail(MissingMethodException) {
             MMTest5.bar()
         }
    }

}

class MMTest {
    def hello() { "world" }
    def methodMissing(String name, args) {
        "foo"
    }
}

class MMTest2 {
    def hello() { "world" }
}

class MMTest3 {
    static hello() { "world" }
}

class MMTest5 {
    static hello() { "world" }
}

class MMTest6 extends MMTest5 {
    static goodbye() { "cruel world" }
}