Groovy example source code file (MixinAnnotationTest.groovy)

This example Groovy source code file (MixinAnnotationTest.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

big, category, category, categorytouse, categorytouse2, categorytouse2, classtoextend, classtoextend, groovyshelltestcase, missingmethodexception, mixed, mixin, string, string

The Groovy MixinAnnotationTest.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

import org.codehaus.groovy.reflection.ReflectionCache

class MixinAnnotationTest extends GroovyShellTestCase {

    void testSingleMixinAnnotation () {
        evaluate """

interface Mixed {
  def getA ()
}

@Category(Mixed)
class CategoryToUse {
    static def msg = "under category: "

    def asText () {
        msg + this + ": " + a
    }
}

@Mixin(CategoryToUse)
class ClassToExtend implements Mixed{
    String toString () {
        "object of ClassToExtend"
    }

    def a = "blah"
}

        GroovyTestCase.assertEquals("under category: object of ClassToExtend: blah", new ClassToExtend().asText ())

        boolean failed = false;
        try {
            new Object().asText ()
        }
        catch (MissingMethodException e) {
          failed = true;
        }
        assert failed

        """
    }

    void testMultipleMixinAnnotation () {
        evaluate """
@Category(Object)
class CategoryToUse1 {
    def asText () {
        "under category: " + asBiggerText ()
    }
}

@Category(Object)
class CategoryToUse2 {
    def asBiggerText () {
        "under BIG category: " + this
    }
}

@Mixin([CategoryToUse1, CategoryToUse2])
class ClassToExtend {
    String toString () {
        "object of ClassToExtend"
    }
}

        GroovyTestCase.assertEquals("under category: under BIG category: object of ClassToExtend", new ClassToExtend().asText ())
        """
    }

    protected void tearDown() {
        super.tearDown()
        ReflectionCache.getCachedClass(ArrayList).setNewMopMethods (null)
        ReflectionCache.getCachedClass(List).setNewMopMethods (null)
    }

//    void testOneClass () {
//        List.mixin ListExt
//        ArrayList.mixin ArrayListExt
//        assertEquals 1, [0,1].swap () [0]
//        assertEquals 0, [0,1].swap () [1]
//        assertEquals 0, [0,1].swap ().unswap () [0]
//        assertEquals 1, [0,1].swap ().unswap () [1]
//    }
//
//    void testWithList () {
//        ArrayList.mixin ArrayListExt, ListExt
//        assertEquals 1, [0,1].swap () [0]
//        assertEquals 0, [0,1].swap () [1]
//        assertEquals 0, [0,1].swap ().unswap () [0]
//        assertEquals 1, [0,1].swap ().unswap () [1]
//    }
//
//    void testCombined () {
//        ArrayList.mixin Combined
//        assertEquals 1, [0,1].swap () [0]
//        assertEquals 0, [0,1].swap () [1]
//        assertEquals 0, [0,1].swap ().unswap () [0]
//        assertEquals 1, [0,1].swap ().unswap () [1]
//    }
//
//    void testWithEmc () {
//        ArrayList.metaClass.unswap = {
//            [delegate[1], delegate[0]]
//        }
//        ArrayList.mixin ArrayListExt
//        assertEquals 1, [0,1].swap () [0]
//        assertEquals 0, [0,1].swap () [1]
//        assertEquals 0, [0,1].swap ().unswap () [0]
//        assertEquals 1, [0,1].swap ().unswap () [1]
//    }
//
//    void testGroovyObject () {
//        ObjToTest obj = new ObjToTest ()
//        assertEquals "original", obj.value
//        obj.mixin ObjToTestCategory
//        assertEquals "changed", obj.value
//        assertEquals "original", new ObjToTest ().value
//    }
//
//    void testGroovyObjectWithEmc () {
//        ObjToTest.metaClass.getValue = { ->
//            "emc changed"
//        }
//        ObjToTest obj = new ObjToTest ()
//        assertEquals "emc changed", obj.getValue()
//        obj.mixin ObjToTestCategory
//        assertEquals "changed", obj.value
//        assertEquals "emc changed", new ObjToTest ().value
//    }
//}
//
//class ArrayListExt {
//    static def swap (ArrayList self) {
//        [self[1], self[0]]
//    }
//}
//
//class ListExt {
//    static def unswap (List self) {
//        [self[1], self[0]]
//    }
//}
//
//class Combined {
//    static def swap (ArrayList self) {
//        [self[1], self[0]]
//    }
//
//    static def unswap (List self) {
//        [self[1], self[0]]
//    }
//}
//
//class ObjToTest {
//    def getValue () {
//        "original"
//    }
//}
//
//class ObjToTestCategory {
//    def static getValue (ObjToTest self) {
//        "changed"
//    }
}