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Groovy example source code file (SequenceTest.java)

This example Groovy source code file (SequenceTest.java) 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

bob, element, groovytestcase, illegalargumentexception, integer, integer, james, list, list, object, object, sequence, sequence, should, util

The Groovy SequenceTest.java 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
 *
 *     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 groovy.util.GroovyTestCase;
import org.codehaus.groovy.runtime.InvokerHelper;

import java.util.List;

/**
 * Tests the use of the structured Attribute type
 *
 * @author <a href="mailto:james@coredevelopers.net">James Strachan
 * @version $Revision: 21515 $
 */
public class SequenceTest extends GroovyTestCase {

    public void testConstruction() {
        Sequence sequence = new Sequence(String.class);
        sequence.add("James");
        sequence.add("Bob");

        assertEquals("Size", 2, sequence.size());
        assertEquals("Element", "James", sequence.get(0));
        assertEquals("Element", "Bob", sequence.get(1));

        // now lets try some methods on each item in the list
        List answer = (List) InvokerHelper.invokeMethod(sequence, "startsWith", new Object[]{"Ja"});
        assertArrayEquals(new Object[]{Boolean.TRUE, Boolean.FALSE}, answer.toArray());

        answer = (List) InvokerHelper.invokeMethod(sequence, "length", null);
        assertArrayEquals(new Object[]{new Integer(5), new Integer(3)}, answer.toArray());
    }

    public void testAddingWrongTypeFails() {
        try {
            Sequence sequence = new Sequence(String.class);
            sequence.add(new Integer(5));

            fail("Should have thrown exception");
        }
        catch (IllegalArgumentException e) {
            System.out.println("Caught: " + e);
        }
    }

    public void testAddingNullFails() {
        try {
            Sequence sequence = new Sequence(String.class);
            sequence.add(null);

            fail("Should have thrown exception");
        }
        catch (NullPointerException e) {
            System.out.println("Caught: " + e);
        }
    }

}

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