def test_dup_works(self):
push(42)
# Dup returns top of stak value:
self.assertEqual(42, dup())
pop()
self.assertEqual(42, pop())
self.assertRaises(IndexError, pop)
def test_dup_works(self):
push(42)
# Dup returns top of stak value:
self.assertEqual(42, dup())
pop()
self.assertEqual(42, pop())
self.assertRaises(IndexError, pop)
def test_roll_works(self):
push(42)
push(40)
push(38)
roll(2, 1)
self.assertEqual(40, pop())
self.assertEqual(38, pop())
self.assertEqual(42, pop())
self.assertRaises(IndexError, pop)
def helper():
push(20)
self.assertEqual(20, pop())
try:
pop()
except IndexError:
pass
else:
assert False, "Stack should be empty - pop returned a value instead"
def helper():
push(20)
self.assertEqual(20, pop())
try:
pop()
except IndexError:
pass
else:
assert False, "Stack should be empty - pop returned a value instead"
def test_roll_works(self):
push(42)
push(40)
push(38)
roll(2, 1)
self.assertEqual(40, pop())
self.assertEqual(38, pop())
self.assertEqual(42, pop())
self.assertRaises(IndexError, pop)
def test_popclear_works(self):
push(42)
push(23)
self.assertEqual(23, popclear())
try:
pop()
except IndexError:
pass
else:
assert False, "Stack should be empty, popped a value instead."
def test_popclear_works(self):
push(42)
push(23)
self.assertEqual(23, popclear())
try:
pop()
except IndexError:
pass
else:
assert False, "Stack should be empty, popped a value instead."
def test_stack_is_isolated_in_generator_contexts(self):
push(42)
def helper():
for i in range(50, 60):
push(i)
yield i
self.assertEqual(i, pop())
push(-1)
for j, i in enumerate(helper()):
self.assertEqual(j - 1, pop())
push(j)
self.assertEqual([42, 9], stack())
def test_stack_is_isolated_in_generator_contexts(self):
push(42)
def helper():
for i in range(50, 60):
push(i)
yield i
self.assertEqual(i, pop())
push(-1)
for j, i in enumerate(helper()):
self.assertEqual(j - 1, pop())
push(j)
self.assertEqual([42, 9], stack())
def test_stack_is_isolated_in_function_contexts(self):
push(42)
def helper():
push(20)
self.assertEqual(20, pop())
try:
pop()
except IndexError:
pass
else:
assert False, "Stack should be empty - pop returned a value instead"
helper()
self.assertEqual(42, pop())
def test_stack_is_isolated_in_function_contexts(self):
push(42)
def helper():
push(20)
self.assertEqual(20, pop())
try:
pop()
except IndexError:
pass
else:
assert False, "Stack should be empty - pop returned a value instead"
helper()
self.assertEqual(42, pop())
def test_discard_if_false(self):
results = [(pop(), len(stack())) for i in range(10) if discard_if_false(push(i) % 2)]
assert all(result[1] == 0 for result in results)
assert len(results) == 5
assert [result[0] for result in results] == list(range(1, 10, 2))
def test_push_pop_works_in_if_expression(self):
self.assertEqual(42, pop() if push(47 - 5) == 42 else 0)
def test_double_pop_raises_stackunderflow(self):
push(42)
pop()
# TODO: specialize the exception
self.assertRaises(IndexError, pop)
def test_push_pop_works_for_multiple_values(self):
for i in range(0, 1000):
push(i)
for i in range(999, -1, -1):
self.assertEqual(i, pop())
def test_push_pop_works(self):
push(42)
self.assertEqual(42, pop())
def test_discard_if_false(self):
results = [(pop(), len(stack())) for i in range(10) if discard_if_false(push(i) % 2)]
assert all(result[1] == 0 for result in results)
assert len(results) == 5
assert [result[0] for result in results] == list(range(1, 10, 2))
def test_roll_works_for_larger_stacks(self):
for i in range(10):
push(i)
roll(5, 3)
self.assertEqual(6, pop())
def test_retr_works(self):
push(42)
self.assertEqual(42, retr())
self.assertEqual(42, pop())
self.assertRaises(IndexError, retr)
def test_push_if_true(self):
results = [(pop(), len(stack())) for i in range(10) if push_if_true(i % 2)]
assert all(result[1] == 0 for result in results)
assert len(results) == 5
def test_push_pop_works(self):
push(42)
self.assertEqual(42, pop())
def helper():
for i in range(50, 60):
push(i)
yield i
self.assertEqual(i, pop())
def test_push_pop_works_for_multiple_values(self):
for i in range(0, 1000):
push(i)
for i in range(999, -1, -1):
self.assertEqual(i, pop())
def test_double_pop_raises_stackunderflow(self):
push(42)
pop()
# TODO: specialize the exception
self.assertRaises(IndexError, pop)
def test_retr_works(self):
push(42)
self.assertEqual(42, retr())
self.assertEqual(42, pop())
self.assertRaises(IndexError, retr)
def test_roll_works_for_larger_stacks(self):
for i in range(10):
push(i)
roll(5, 3)
self.assertEqual(6, pop())
def helper():
for i in range(50, 60):
push(i)
yield i
self.assertEqual(i, pop())
def test_push_if_true(self):
results = [(pop(), len(stack())) for i in range(10) if push_if_true(i % 2)]
assert all(result[1] == 0 for result in results)
assert len(results) == 5
def test_push_pop_works_in_if_expression(self):
self.assertEqual(42, pop() if push(47 - 5) == 42 else 0)
