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/*******************************************************************************
* Copyright (c) 2007 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.tests.internal;
import java.util.EmptyStackException;
import org.eclipse.jpt.utility.internal.SimpleStack;
import org.eclipse.jpt.utility.internal.Stack;
import junit.framework.TestCase;
public class SimpleStackTests extends TestCase {
public SimpleStackTests(String name) {
super(name);
}
public void testIsEmpty() {
Stack<String> stack = new SimpleStack<String>();
assertTrue(stack.isEmpty());
stack.push("first");
assertFalse(stack.isEmpty());
stack.push("second");
assertFalse(stack.isEmpty());
stack.pop();
assertFalse(stack.isEmpty());
stack.pop();
assertTrue(stack.isEmpty());
}
public void testPushAndPop() {
Stack<String> stack = new SimpleStack<String>();
String first = "first";
String second = "second";
stack.push(first);
stack.push(second);
assertEquals(second, stack.pop());
assertEquals(first, stack.pop());
}
public void testPushAndPeek() {
Stack<String> stack = new SimpleStack<String>();
String first = "first";
String second = "second";
stack.push(first);
stack.push(second);
assertEquals(second, stack.peek());
assertEquals(second, stack.peek());
assertEquals(second, stack.pop());
assertEquals(first, stack.peek());
assertEquals(first, stack.peek());
assertEquals(first, stack.pop());
}
public void testEmptyStackExceptionPeek() {
Stack<String> stack = new SimpleStack<String>();
String first = "first";
String second = "second";
stack.push(first);
stack.push(second);
assertEquals(second, stack.peek());
assertEquals(second, stack.pop());
assertEquals(first, stack.peek());
assertEquals(first, stack.pop());
boolean exCaught = false;
try {
stack.peek();
} catch (EmptyStackException ex) {
exCaught = true;
}
assertTrue(exCaught);
}
public void testEmptyStackExceptionPop() {
Stack<String> stack = new SimpleStack<String>();
String first = "first";
String second = "second";
stack.push(first);
stack.push(second);
assertEquals(second, stack.peek());
assertEquals(second, stack.pop());
assertEquals(first, stack.peek());
assertEquals(first, stack.pop());
boolean exCaught = false;
try {
stack.pop();
} catch (EmptyStackException ex) {
exCaught = true;
}
assertTrue(exCaught);
}
public void testClone() {
SimpleStack<String> stack = new SimpleStack<String>();
stack.push("first");
stack.push("second");
stack.push("third");
this.verifyClone(stack, stack.clone());
}
public void testSerialization() throws Exception {
SimpleStack<String> stack = new SimpleStack<String>();
stack.push("first");
stack.push("second");
stack.push("third");
this.verifyClone(stack, TestTools.serialize(stack));
}
private void verifyClone(Stack<String> original, Stack<String> clone) {
assertNotSame(original, clone);
assertEquals(original.peek(), clone.peek());
assertEquals(original.pop(), clone.pop());
assertEquals(original.peek(), clone.peek());
assertEquals(original.pop(), clone.pop());
assertEquals(original.isEmpty(), clone.isEmpty());
assertEquals(original.peek(), clone.peek());
assertEquals(original.pop(), clone.pop());
assertTrue(original.isEmpty());
assertEquals(original.isEmpty(), clone.isEmpty());
original.push("fourth");
assertFalse(original.isEmpty());
// clone should still be empty
assertTrue(clone.isEmpty());
}
}
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