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require "stack"
class StackTests < Test::Unit::TestCase
def test_math
assert_equal(2, 1+1)
end
def test_assertions
# puts self.methods
end
def test_should_be_able_to_push_items_onto_the_stack
stack = Stack.new
stack.push "hello"
assert_equal(1, stack.total_items)
stack.push "yo"
assert_equal(2, stack.total_items)
end
def test_should_be_able_to_pop_the_last_item_off_of_the_stack
stack=Stack.new
stack.push "hello"
stack.push "goodbye"
assert_equal("goodbye", stack.pop)
end
def test_should_remove_the_last_item_popped_off_of_the_stack
stack=Stack.new
stack.push "hello"
stack.push "goodbye"
assert_equal("goodbye", stack.pop)
assert_equal(1, stack.total_items)
assert_equal("hello", stack.pop)
assert_equal(0, stack.total_items)
end
def test_should_return_nil_when_there_is_nothing_on_the_stack
stack=Stack.new
assert_equal(nil, stack.pop)
end
end
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