def test_last_in_first_out(self):
test_stack = UniqueStack()
test_stack.push(UniqueLimitedStackTestCase.ITEM_1)
test_stack.push(UniqueLimitedStackTestCase.ITEM_2)
test_stack.push(UniqueLimitedStackTestCase.ITEM_3)
self.assertEqual(3, test_stack.size())
self.assertEqual(UniqueLimitedStackTestCase.ITEM_3, test_stack.pop())
self.assertEqual(UniqueLimitedStackTestCase.ITEM_2, test_stack.pop())
self.assertEqual(UniqueLimitedStackTestCase.ITEM_1, test_stack.pop())
def test_base_stack_empty(self):
test_stack = UniqueStack()
self.assertEqual(0, test_stack.size())
def test_pop_empty_stack(self):
test_stack = UniqueStack()
self.assertEqual(None, test_stack.pop())
def test_pop_single_item(self):
test_stack = UniqueStack()
test_stack.push(UniqueLimitedStackTestCase.ITEM_1)
self.assertEqual(UniqueLimitedStackTestCase.ITEM_1, test_stack.pop())
self.assertEqual(0, test_stack.size())
def test_push_none(self):
test_stack = UniqueStack()
with self.assertRaises(TypeError):
test_stack.push(None)
def test_peek_size_remains(self):
test_stack = UniqueStack()
test_stack.push(UniqueLimitedStackTestCase.ITEM_1)
self.assertEqual(UniqueLimitedStackTestCase.ITEM_1, test_stack.peek())
self.assertEqual(1, test_stack.size())
def test_push_duplicates(self):
test_stack = UniqueStack()
test_stack.push(UniqueLimitedStackTestCase.ITEM_1)
with self.assertRaises(ValueError):
test_stack.push(UniqueLimitedStackTestCase.ITEM_1)
self.assertEqual(1, test_stack.size())
def test_push_increases_size(self):
test_stack = UniqueStack()
test_stack.push(UniqueLimitedStackTestCase.ITEM_1)
self.assertEqual(1, test_stack.size())
def test_unique_behavior(self):
test_stack = UniqueStack()
test_stack.push(STC.ITEM_1)
with self.assertRaises(ValueError):
test_stack.push(STC.ITEM_1)
self.assertEqual(STC.ITEM_1, test_stack.pop())