def test_passes_on_unyielding_generator(self):
"""Test that assert_empty passes on an 'empty' generator."""
def yield_nothing():
if False:
yield 0
assertions.assert_empty(yield_nothing())
def test_passes_on_unyielding_generator(self):
"""Test that assert_empty passes on an 'empty' generator."""
def yield_nothing():
if False:
yield 0
assertions.assert_empty(yield_nothing())
def test_fails_on_infinite_generator(self):
"""Tests that assert_empty fails on an infinite generator."""
def yes():
while True:
yield 'y'
with assertions.assert_raises(AssertionError):
assertions.assert_empty(yes())
def test_fails_on_infinite_generator(self):
"""Tests that assert_empty fails on an infinite generator."""
def yes():
while True:
yield 'y'
with assertions.assert_raises(AssertionError):
assertions.assert_empty(yes())
def test_max_elements_to_print_eq_0_means_no_sample_message(self):
"""Tests that when max_elements_to_print is 0, there is no sample in the error message."""
iterable = [1, 2, 3]
expected_message = "iterable %s was unexpectedly non-empty." % iterable
def message_has_no_sample(exception):
assertions.assert_equal(str(exception), expected_message)
with assertions.assert_raises_such_that(AssertionError,
message_has_no_sample):
assertions.assert_empty(iterable, max_elements_to_print=0)
def test_max_elements_to_print_eq_0_means_no_sample_message(self):
"""Tests that when max_elements_to_print is 0, there is no sample in the error message."""
iterable = [1, 2, 3]
expected_message = "iterable %s was unexpectedly non-empty." % iterable
def message_has_no_sample(exception):
assertions.assert_equal(str(exception), expected_message)
with assertions.assert_raises_such_that(
AssertionError, message_has_no_sample):
assertions.assert_empty(iterable, max_elements_to_print=0)
def test_max_elements_to_print_eq_len_means_whole_iterable_sample_message(self):
"""
Tests that when max_elements_to_print is equal to the length of
the whole iterable, the whole iterable is printed.
"""
elements = [1, 2, 3, 4, 5]
iterable = (i for i in elements)
expected_message = "iterable %s was unexpectedly non-empty. elements: %s" \
% (iterable, elements)
def message_has_whole_iterable_sample(exception):
assertions.assert_equal(str(exception), expected_message)
with assertions.assert_raises_such_that(
AssertionError, message_has_whole_iterable_sample):
assertions.assert_empty(iterable, max_elements_to_print=len(elements))
def test_max_elements_to_print_lt_len_means_partial_iterable_sample_message(self):
"""
Tests that when max_elements_to_print is less than the length of the
whole iterable, the first max_elements_to_print elements are printed.
"""
elements = [1, 2, 3, 4, 5]
iterable = (i for i in elements)
max_elements_to_print = len(elements) - 1
expected_message = "iterable %s was unexpectedly non-empty. first %i elements: %s" \
% (iterable, max_elements_to_print, elements[:max_elements_to_print])
def message_has_whole_iterable_sample(exception):
assertions.assert_equal(str(exception), expected_message)
with assertions.assert_raises_such_that(
AssertionError, message_has_whole_iterable_sample):
assertions.assert_empty(iterable, max_elements_to_print=max_elements_to_print)
def test_max_elements_to_print_eq_len_means_whole_iterable_sample_message(
self):
"""
Tests that when max_elements_to_print is equal to the length of
the whole iterable, the whole iterable is printed.
"""
elements = [1, 2, 3, 4, 5]
iterable = (i for i in elements)
expected_message = "iterable %s was unexpectedly non-empty. elements: %s" \
% (iterable, elements)
def message_has_whole_iterable_sample(exception):
assertions.assert_equal(str(exception), expected_message)
with assertions.assert_raises_such_that(
AssertionError, message_has_whole_iterable_sample):
assertions.assert_empty(iterable,
max_elements_to_print=len(elements))
def test_max_elements_to_print_lt_len_means_partial_iterable_sample_message(
self):
"""
Tests that when max_elements_to_print is less than the length of the
whole iterable, the first max_elements_to_print elements are printed.
"""
elements = [1, 2, 3, 4, 5]
iterable = (i for i in elements)
max_elements_to_print = len(elements) - 1
expected_message = "iterable %s was unexpectedly non-empty. first %i elements: %s" \
% (iterable, max_elements_to_print, elements[:max_elements_to_print])
def message_has_whole_iterable_sample(exception):
assertions.assert_equal(str(exception), expected_message)
with assertions.assert_raises_such_that(
AssertionError, message_has_whole_iterable_sample):
assertions.assert_empty(
iterable, max_elements_to_print=max_elements_to_print)
def test_fails_on_nonempty_list(self):
"""Test that assert_empty fails on a nonempty list."""
with assertions.assert_raises(AssertionError):
assertions.assert_empty([0])
def test_passes_on_empty_list(self):
"""Test that assert_empty passes on an empty list."""
assertions.assert_empty([])
def test_fails_on_nonempty_tuple(self):
"""Test that assert_empty fails on a nonempty tuple."""
with assertions.assert_raises(AssertionError):
assertions.assert_empty((0, ))
def test_fails_on_nonempty_tuple(self):
"""Test that assert_empty fails on a nonempty tuple."""
with assertions.assert_raises(AssertionError):
assertions.assert_empty((0,))
def test_fails_on_nonempty_list(self):
"""Test that assert_empty fails on a nonempty list."""
with assertions.assert_raises(AssertionError):
assertions.assert_empty([0])
def test_passes_on_empty_list(self):
"""Test that assert_empty passes on an empty list."""
assertions.assert_empty([])
def test_passes_on_empty_tuple(self):
"""Test that assert_empty passes on an empty tuple."""
assertions.assert_empty(())
def test_passes_on_empty_tuple(self):
"""Test that assert_empty passes on an empty tuple."""
assertions.assert_empty(())