src/test/groovy/transform/stc/AnonymousInnerClassSTCTest.groovy

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.transform.stc

/**
 * Test cases specifically aimed at testing the behaviour of the type checker
 * with regards to anonymous inner classes.
 */
class AnonymousInnerClassSTCTest extends StaticTypeCheckingTestCase {

    // GROOVY-5565
    void testShouldNotThrowNPE() {
        assertScript '''
            Serializable s = new Serializable() { List things = [] }
            assert s.things.size() == 0
        '''
        assertScript '''
            Serializable s = new Serializable() { List things = [1] }
            assert s.things.size() == 1
        '''
    }

    void testAssignmentOfAICFromInterface() {
        assertScript '''
            Runnable r = new Runnable() {
                public void run() { println 'ok' }
            }
            r.run()
        '''
    }

    void testAssignmentOfAICFromAbstractClass() {
        assertScript '''
            abstract class Foo { abstract String item() }
            Foo f = new Foo() {
                String item() { 'ok' }
            }
            assert f.item() == 'ok'
        '''
    }

    void testAssignmentOfAICFromAbstractClassAndInterface() {
        assertScript '''
            abstract class Foo  implements Runnable { abstract String item() }
            Foo f = new Foo() {
                String item() { 'ok' }
                void run() {}
            }
            assert f.item() == 'ok'
            f.run()
        '''
    }

    void testCallMethodUsingAIC() {
        assertScript '''abstract class Foo { abstract String item() }
            boolean valid(Foo foo) {
                foo.item() == 'ok'
            }
            def f = new Foo() {
                String item() { 'ok' }
            }
            assert valid(f)
        '''
    }

    void testCallMethodUsingAICImplementingInterface() {
        assertScript '''abstract class Foo implements Runnable { abstract String item() }
            boolean valid(Foo foo) {
                foo.item() == 'ok'
            }
            def f = new Foo() {
                String item() { 'ok' }
                void run() {}
            }
            assert valid(f)
            f.run()
        '''
    }

    void testAICIntoClass() {
        assertScript '''
            class Outer {
                int outer() { 1 }
                abstract class Inner {
                    abstract int inner()
                }
                int test() {
                    Inner inner = new Inner() {
                        int inner() { outer() }
                    }
                    inner.inner()
                }
            }
            assert new Outer().test() == 1
        '''
    }

    // GROOVY-5566
    void testAICReferencingOuterLocalVariable() {
        assertScript '''
            def foo() {
                List things = []
                Serializable s = new Serializable() {
                  def size() {
                    things.size()
                  }
                }
                s.size()
            }
        '''
    }

    void testAICInAICInStaticMethod() {
        assertScript '''
            class A {
                public static foo() {
                    return new Object() {
                        public String toString() {
                            return new Object() {
                                public String toString() {
                                    "ii"
                                }
                            }.toString()+" i"
                        }
                    }.toString()
                }
            }
            assert A.foo() == "ii i"
        '''
    }

    // GROOVY-6904
    void testAICInClosure() {
        assertScript '''
            interface X {
                def m()
            }

            class A {
                Object pm = "pm"
                def bar(Closure<? extends X> x) {x().m()}
                def foo() {
                    bar { ->
                        return new X() {
                            def m() { pm }
                        }
                    }
                }
            }
            def a = new A()
            assert a.foo() == "pm"
        '''
    }

    void testAICWithGenerics() {
        assertScript '''
            Comparator<Integer> comp = new Comparator<Integer>(){
                @Override
                int compare(Integer o1, Integer o2) {
                    return 0
                }
            }
        '''
    }
}