/**
* Check that a newly created stack isn't full, and doesn't become full when we push several
* things on it. In fact _no_ stack in this implementation should ever be full.
*
* <p>Note that this is a <em>classic</em> example of how testing can never <em>prove</em> that
* code is correct. No matter how many items we push on this stack, we can never be sure that it
* we just pushed <em>one</em> more on we could cause full to return true.
*/
@Ignore
@Test
public void testIsFull() {
final StackIF<Integer> stack = makeIntegerStack();
assertFalse("Stacks should never be full", stack.isFull());
for (int i = 0; i < 100; ++i) {
stack.push(i);
assertFalse("Stacks should never be full", stack.isFull());
}
}
/** A simple test to show that top() is working correctly when items are being pushed/popped */
@Ignore
@Test
public void testPushPopTop() {
final StackIF<String> stack = makeStringStack();
stack.push(values[2]);
assertEquals("The top item of the stack should be 'Three'", stack.top(), "Three");
stack.push(values[2]);
stack.push(values[0]);
stack.pop();
assertEquals("The top item of the stack should be 'Three'", stack.top(), "Three");
stack.pop();
stack.push(values[1]);
stack.push(values[1]);
stack.pop();
assertEquals("The top item of the stack should be 'Two'", stack.top(), "Two");
}
/** Tests that isEmpty() is working correctly when items are being pushed/popped. */
@Ignore
@Test
public void testEmptyMethod() {
final StackIF<Integer> stack = makeIntegerStack();
assertTrue("Stack should be empty", stack.isEmpty());
stack.push(1);
stack.push(2);
assertFalse("Stack should not be empty", stack.isEmpty());
stack.pop();
stack.pop();
assertTrue("Stack should be empty", stack.isEmpty());
}
/** Tests that calling top on an empty stack throws a StackUnderflowException. */
@Ignore
@Test(expected = StackUnderflowException.class)
public void topOnEmptyThrowsException() {
final StackIF<Integer> stack = makeIntegerStack();
stack.top();
}
/** Tests that a stack is empty when it's initially created. */
@Ignore
@Test
public void isNewStackEmpty() {
final StackIF<Integer> stack = makeIntegerStack();
assertEquals("Empty stack should have size 0", 0, stack.size());
}
/** Simple test to show that size() is working correctly as items are being pushed/popped. */
@Ignore
@Test
public void testPushPopSize() {
final StackIF<String> stack = makeStringStack();
stack.push(values[0]);
stack.push(values[1]);
stack.push(values[1]);
assertEquals("Stack should have a size of 3", stack.size(), 3);
stack.pop();
stack.push(values[2]);
stack.push(values[1]);
stack.push(values[0]);
assertEquals("Stack should have a size of 5", stack.size(), 5);
stack.pop();
stack.pop();
stack.pop();
stack.pop();
stack.pop();
assertEquals("Stack should be empty", stack.size(), 0);
}
