public virtual void TestPushPop()
{
Stack4 stack = new Stack4();
AssertEmpty(stack);
stack.Push("a");
stack.Push("b");
stack.Push("c");
Assert.IsFalse(stack.IsEmpty());
Assert.AreEqual("c", stack.Peek());
Assert.AreEqual("c", stack.Peek());
Assert.AreEqual("c", stack.Pop());
Assert.AreEqual("b", stack.Pop());
Assert.AreEqual("a", stack.Peek());
Assert.AreEqual("a", stack.Pop());
AssertEmpty(stack);
}
private void AssertEmpty(Stack4 stack)
{
Assert.IsTrue(stack.IsEmpty());
Assert.IsNull(stack.Peek());
Assert.Expect(typeof(InvalidOperationException), new _ICodeBlock_35(stack));
}