Commons Collections example source code file (TestArrayStack.java)

This example Commons Collections source code file (TestArrayStack.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 - Commons Collections tags/keywords

arraystack, emptystackexception, first, first, item, item, popped, second, second, stack, stack, string, testarraystack, top, util

The Commons Collections TestArrayStack.java source code

/*
 *  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 org.apache.commons.collections;

import java.util.EmptyStackException;
import java.util.List;

import junit.framework.Test;

/**
 * Tests ArrayStack.
 * 
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Craig McClanahan
 */
public class TestArrayStack extends TestArrayList {
    
    protected ArrayStack stack = null;

    public TestArrayStack(String testName) {
        super(testName);
    }

    public static Test suite() {
        return BulkTest.makeSuite(TestArrayStack.class);
    }

    public static void main(String args[]) {
        String[] testCaseName = { TestArrayStack.class.getName() };
        junit.textui.TestRunner.main(testCaseName);
    }

    public List makeEmptyList() {
        return new ArrayStack();
    }

    public void setUp() {
        stack = (ArrayStack) makeEmptyList();
        list = stack;
    }

    //-----------------------------------------------------------------------
    public void testNewStack() {

        assertTrue("New stack is empty", stack.empty());
        assertEquals("New stack has size zero", stack.size(), 0);

        try {
            stack.peek();
            fail("peek() should have thrown EmptyStackException");
        } catch (EmptyStackException e) {
            ; // Expected result
        }

        try {
            stack.pop();
            fail("pop() should have thrown EmptyStackException");
        } catch (EmptyStackException e) {
            ; // Expected result
        }

    }

    public void testPushPeekPop() {

        stack.push("First Item");
        assertTrue("Stack is not empty", !stack.empty());
        assertEquals("Stack size is one", stack.size(), 1);
        assertEquals("Top item is 'First Item'",
                     (String) stack.peek(), "First Item");
        assertEquals("Stack size is one", stack.size(), 1);

        stack.push("Second Item");
        assertEquals("Stack size is two", stack.size(), 2);
        assertEquals("Top item is 'Second Item'",
                     (String) stack.peek(), "Second Item");
        assertEquals("Stack size is two", stack.size(), 2);

        assertEquals("Popped item is 'Second Item'",
                     (String) stack.pop(), "Second Item");
        assertEquals("Top item is 'First Item'",
                     (String) stack.peek(), "First Item");
        assertEquals("Stack size is one", stack.size(), 1);

        assertEquals("Popped item is 'First Item'",
                     (String) stack.pop(), "First Item");
        assertEquals("Stack size is zero", stack.size(), 0);

    }

    public void testSearch() {

        stack.push("First Item");
        stack.push("Second Item");
        assertEquals("Top item is 'Second Item'",
                     stack.search("Second Item"), 1);
        assertEquals("Next Item is 'First Item'",
                     stack.search("First Item"), 2);
        assertEquals("Cannot find 'Missing Item'",
                     stack.search("Missing Item"), -1);

    }

}