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Groovy example source code file (ConstructorDelegationTest.groovy)

This example Groovy source code file (ConstructorDelegationTest.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

a, a, closure, closure, compilabletestsupport, constructordelegationtest, myclosure3128v1, myclosure3128v2, myclosure3128v3, myclosure3128v4, myclosure3128v4, superconstructorcall, thisconstructorcall, thisconstructorcall

The Groovy ConstructorDelegationTest.groovy source code

/*
 * Copyright 2003-2010 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 gls.invocation

import gls.CompilableTestSupport

public class ConstructorDelegationTest extends CompilableTestSupport {

    public void testThisCallWithParameter() {
        assertScript """
            class A {
                def foo
                A(String x){foo=x}
                A(){this("bar")}
            }
            def a = new A()
            assert a.foo == "bar"
        """
    }

    public void testThisCallWithoutParameter() {
        assertScript """
            class A {
                def foo
                A(String x){this(); foo=x}
                A(){foo="bar"}
            }
            def a = new A("foo")
            assert a.foo == "foo"
        """
    }

    public void testThisConstructorCallNotOnFirstStmt() {
        shouldNotCompile """
            class ThisConstructorCall {
                public ThisConstructorCall() {
                    println 'dummy first statement'
                    this(19)
                }
                public ThisConstructorCall(int b) {
                    println 'another dummy statement'
                }
            }
            1
        """
    }

    public void testSuperConstructorCallNotOnFirstStmt() {
        shouldNotCompile """
            class SuperConstructorCall {
                public SuperConstructorCall() {
                    println 'dummy first statement'
                    super()
                }
            }
            1
        """
    }

    public void testConstructorDelegationWithThisOrSuperInArgs() {
        def scriptStr
        // all 4 cases below were compiling earlier but giving VerifyError at runtime
        scriptStr = """
            class MyClosure3128V1 extends Closure {
                MyClosure3128V1() {
                    super(this)
                }
                void run() { println 'running' }
            }
        """
        shouldNotCompile(scriptStr)

        scriptStr = """
            class MyClosure3128V2 extends Closure {
                MyClosure3128V2() {
                    super(super)
                }
                void run() { println 'running' }
            }
        """
        shouldNotCompile(scriptStr)

        scriptStr = """
            class MyClosure3128V3 extends Closure {
                MyClosure3128V3() {
                    this(this)
                }
                MyClosure3128V3(owner) {}
                void run() { println 'running' }
            }
        """
        shouldNotCompile(scriptStr)

        scriptStr = """
            class MyClosure3128V4 extends Closure {
                MyClosure3128V4() {
                    this(super)
                }
                MyClosure3128V4(owner) {}
                void run() { println 'running' }
            }
        """
        shouldNotCompile(scriptStr)
    }
}

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