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Groovy example source code file (

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

Java - Groovy tags/keywords

bob, bob, dummybean, dummybean, groovytestcase, gstring, integer, invokerinvocationexception, invoking, object, object, string, throwable, throwable

The Groovy source code

 * Copyright 2003-2011 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.codehaus.groovy.runtime;

import groovy.lang.GString;
import groovy.util.GroovyTestCase;

 * Tests method invocation
 * @author <a href="">James Strachan
 * @version $Revision: 21515 $
public class InvokeConstructorTest extends GroovyTestCase {

    public void testInvokeConstructorNoParams() throws Throwable {
        assertConstructor(new DummyBean(), new Object[0]);

    public void testInvokeConstructorOneParam() throws Throwable {
        assertConstructor(new DummyBean("Bob"), "Bob");

    public void testInvokeConstructorOneParamWhichIsNull() throws Throwable {
        assertConstructor(new DummyBean("Bob", new Integer(1707)), new Object[]{"Bob", new Integer(1707)});

    public void testConstructorWithGStringCoercion() throws Throwable {
        GString gstring = new GString(new Object[]{new Integer(123)}) {
            public String[] getStrings() {
                return new String[]{""};

        Object expected = new Long(gstring.toString());

        assertConstructor(expected, new Object[]{gstring});

    protected void assertConstructor(Object expected, Object arguments) throws Throwable {
        Object value = invoke(expected.getClass(), arguments);

        assertEquals("Invoking overloaded method for arguments: " + InvokerHelper.toString(arguments), expected, value);

    protected Object invoke(Class type, Object args) throws Throwable {
        try {
            return InvokerHelper.invokeConstructorOf(type, args);
        catch (InvokerInvocationException e) {
            throw e.getCause();

Other Groovy examples (source code examples)

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