def it_shows_diff_when_strings_differ(self):
def _fails():
expect("foo\nbar") == "foo\nbaz"
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
"Expected 'foo\\nbaz' but got 'foo\\nbar'\n" "Diff:\n" "@@ -1,2 +1,2 @@\n" " foo\n" "-baz\n" "+bar"
), fail_msg(_fails)
def they_adjust_failure_message_for_expectation_name(self):
def can_do_something(thing): return False
def will_do_something(thing): return False
for predicate in [can_do_something, will_do_something]:
add_expectation(predicate)
assert fail_msg(expect('walrus').can_do_something) == (
"Expected that 'walrus' can_do_something, but it can't")
assert fail_msg(expect('walrus').will_do_something) == (
"Expected that 'walrus' will_do_something, but it won't")
def it_shows_diff_when_strings_differ(self):
def _fails():
expect('foo\nbar') == 'foo\nbaz'
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
"Expected 'foo\\nbaz' but got 'foo\\nbar'\n"
"Diff:\n"
"@@ -1,2 +1,2 @@\n"
" foo\n"
"-baz\n"
"+bar"), fail_msg(_fails)
def they_adjust_failure_message_for_expectation_name(self):
def can_do_something(thing):
return False
def will_do_something(thing):
return False
for predicate in [can_do_something, will_do_something]:
add_expectation(predicate)
assert fail_msg(expect('walrus').can_do_something) == (
"Expected that 'walrus' can_do_something, but it can't")
assert fail_msg(expect('walrus').will_do_something) == (
"Expected that 'walrus' will_do_something, but it won't")
def it_expects_isinstance(self):
expect(1).isinstance(int)
def _fails():
expect(1).isinstance(str)
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected an instance of str but got an instance of int')
def it_requires_exceptions_to_be_raised(self):
def _expects_raise_but_doesnt_get_it():
with expect.raises(KeyError):
pass
assert_raises(AssertionError, _expects_raise_but_doesnt_get_it)
assert fail_msg(_expects_raise_but_doesnt_get_it) == ("Expected an exception of type KeyError but got none")
def they_have_default_failure_message(self):
def predicate_with_bad_name(thing):
return False
add_expectation(predicate_with_bad_name)
assert fail_msg(expect('walrus').predicate_with_bad_name) == (
"Expected that 'walrus' predicate_with_bad_name, but got False")
def it_expects_isinstance_for_multiple_types(self):
expect('str').isinstance((str, bytes))
def _fails():
expect('str').isinstance((int, tuple))
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected an instance of int or tuple but got an instance of str')
def it_can_require_failure_messages(self):
def _fails():
with expect.raises(ValueError, "my message"):
raise ValueError("wrong message")
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == ("Expected ValueError('my message') but got ValueError('wrong message')")
def it_expects_less_than_or_equal(self):
expect(1) <= 1
expect(1) <= 2
def _fails(): expect(2) <= 1
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected something less than or equal to 1 but got 2')
def it_shows_diff_for_large_reprs(self):
sequence = list(range(1000, 1050))
big_list = sequence[:20] + [1019] + sequence[20:]
def _fails(): expect(big_list) == sequence
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == ("Expected {0} but got {1}\n"
"Diff:\n"
"@@ -17,6 +17,7 @@\n"
" 1016,\n"
" 1017,\n"
" 1018,\n"
"+ 1019,\n"
" 1019,\n"
" 1020,\n"
" 1021,"
).format(repr(sequence), repr(big_list)), fail_msg(_fails)
def it_expects_containment(self):
expect([1]).contains(1)
def _fails():
expect([2]).contains(1)
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
"Expected [2] to contain 1 but it didn't")
def it_expects_non_containment(self):
expect([1]).does_not_contain(0)
def _fails():
expect([1]).does_not_contain(1)
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
"Expected [1] to not contain 1 but it did")
def it_expects_greater_than_or_equal(self):
expect(1) >= 1
expect(2) >= 1
def _fails(): expect(1) >= 2
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected something greater than or equal to 2 but got 1')
def they_can_fail(self):
add_expectation(self.is_a_potato)
def _fails():
expect('not a potato').is_a_potato()
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
"Expected that 'not a potato' is_a_potato, but it isn't")
def it_requires_exceptions_to_be_raised(self):
def _expects_raise_but_doesnt_get_it():
with expect.raises(KeyError):
pass
assert_raises(AssertionError, _expects_raise_but_doesnt_get_it)
assert fail_msg(_expects_raise_but_doesnt_get_it) == (
'Expected an exception of type KeyError but got none')
def it_expects_equals(self):
expect(2) == 1 + 1
def _fails():
expect(1) == 2
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == 'Expected 2 but got 1'
def it_expects_less_than(self):
expect(1) < 2
def _fails():
expect(1) < 0
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == 'Expected something less than 0 but got 1'
def it_expects_not_equals(self):
expect(1) != 2
def _fails():
expect(1) != 1
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == 'Expected anything except 1 but got it'
def it_expects_non_containment(self):
expect([1]).does_not_contain(0)
def _fails():
expect([1]).does_not_contain(1)
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == ("Expected [1] to not contain 1 but it did")
def they_have_default_failure_message(self):
def predicate_with_bad_name(thing):
return False
add_expectation(predicate_with_bad_name)
assert fail_msg(expect("walrus").predicate_with_bad_name) == (
"Expected that 'walrus' predicate_with_bad_name, but got False"
)
def it_expects_less_than(self):
expect(1) < 2
def _fails():
expect(1) < 0
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == "Expected something less than 0 but got 1"
def it_expects_containment(self):
expect([1]).contains(1)
def _fails():
expect([2]).contains(1)
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == ("Expected [2] to contain 1 but it didn't")
def it_expects_greater_than(self):
expect(2) > 1
def _fails():
expect(0) > 1
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == ("Expected something greater than 1 but got 0")
def it_expects_not_equals(self):
expect(1) != 2
def _fails():
expect(1) != 1
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == "Expected anything except 1 but got it"
def it_expects_equals(self):
expect(2) == 1 + 1
def _fails():
expect(1) == 2
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == "Expected 2 but got 1"
def it_expects_isinstance_for_multiple_types(self):
expect('str').isinstance((str, bytes))
def _fails():
expect('str').isinstance((int, tuple))
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected an instance of int or tuple but got an instance of str')
def it_expects_greater_than(self):
expect(2) > 1
def _fails():
expect(0) > 1
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected something greater than 1 but got 0')
def it_can_require_failure_messages(self):
def _fails():
with expect.raises(ValueError, 'my message'):
raise ValueError('wrong message')
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
"Expected ValueError('my message') but got ValueError('wrong message')"
)
def they_can_fail(self):
add_expectation(self.is_a_potato)
def _fails():
expect('not a potato').is_a_potato()
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
"Expected that 'not a potato' is_a_potato, but it isn't")
def it_expects_isinstance(self):
expect(1).isinstance(int)
def _fails():
expect(1).isinstance(str)
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected an instance of str but got an instance of int')
def it_expects_less_than_or_equal(self):
expect(1) <= 1
expect(1) <= 2
def _fails():
expect(2) <= 1
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected something less than or equal to 1 but got 2')
def it_expects_greater_than_or_equal(self):
expect(1) >= 1
expect(2) >= 1
def _fails():
expect(1) >= 2
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == (
'Expected something greater than or equal to 2 but got 1')
def it_shows_diff_for_large_reprs(self):
sequence = list(range(1000, 1050))
big_list = sequence[:20] + [1019] + sequence[20:]
def _fails():
expect(big_list) == sequence
assert_raises(AssertionError, _fails)
assert fail_msg(_fails) == ("Expected {0} but got {1}\n"
"Diff:\n"
"@@ -17,6 +17,7 @@\n"
" 1016,\n"
" 1017,\n"
" 1018,\n"
"+ 1019,\n"
" 1019,\n"
" 1020,\n"
" 1021,").format(
repr(sequence),
repr(big_list)), fail_msg(_fails)
def it_shows_diff_when_unicode_strings_differ(self):
value = "ueber\ngeek"
fixture = "über\ngeek"
assert isinstance(value, unicode), "value is a " + repr(type(value))
assert isinstance(fixture, unicode), "fixture is a " + repr(type(fixture))
def _fails():
expect(value) == fixture
assert_raises(AssertionError, _fails)
msg = (
"Expected 'über\\ngeek' but got 'ueber\\ngeek'\n" "Diff:\n" "@@ -1,2 +1,2 @@\n" "-über\n" "+ueber\n" " geek"
)
# normalize real msg for differences in py2 and py3
real = fail_msg(_fails).replace("u'", "'").replace("\\xfc", "\xfc")
assert real == msg, "\n" + repr(real) + "\n" + repr(msg)
def it_shows_diff_when_unicode_strings_differ(self):
value = 'ueber\ngeek'
fixture = 'über\ngeek'
assert isinstance(value, unicode), "value is a " + repr(type(value))
assert isinstance(fixture, unicode), "fixture is a " + repr(type(fixture))
def _fails(): expect(value) == fixture
assert_raises(AssertionError, _fails)
msg = ("Expected 'über\\ngeek' but got 'ueber\\ngeek'\n"
"Diff:\n"
"@@ -1,2 +1,2 @@\n"
"-über\n"
"+ueber\n"
" geek"
)
#normalize real msg for differences in py2 and py3
real = fail_msg(_fails).replace("u'", "'").replace(
'\\xfc', '\xfc')
assert real == msg, '\n' + repr(real) + '\n' + repr(msg)
