public void Peek()
{
var stack = new Stack <string>();
try
{
stack.Peek();
Assert.Fail();
}
catch (InvalidOperationException) { }
stack = new Stack <string>(Globals.Strings);
var system = new S.Stack <string>(Globals.Strings);
while (stack.Count != 0)
{
Assert.IsTrue(stack.Peek() == system.Peek());
stack.Pop();
system.Pop();
Comparer <string> .Compare(stack, system);
}
Assert.IsTrue(stack.Count == system.Count && stack.Count == 0);
try
{
stack.Peek();
Assert.Fail();
}
catch (InvalidOperationException) { }
}
public void TryPeek()
{
var stack = new Stack <string>(Globals.Strings);
var system = new S.Stack <string>(Globals.Strings);
while (stack.TryPeek(out string first))
{
Assert.IsTrue(first == system.Peek());
stack.Pop();
system.Pop();
Comparer <string> .Compare(stack, system);
}
Comparer <string> .Compare(stack, system);
Assert.IsFalse(stack.TryPeek(out _));
}