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Demo of Python failure reports with pytestΒΆHere is a nice run of several failures and how pytest presents things:
assertion $ pytest failure_demo.py
=========================== test session starts ============================
platform linux -- Python 3.x.y, pytest-8.x.y, pluggy-1.x.y
rootdir: /home/sweet/project/assertion
collected 44 items
failure_demo.py FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF [100%]
================================= FAILURES =================================
___________________________ test_generative[3-6] ___________________________
param1 = 3, param2 = 6
@pytest.mark.parametrize("param1, param2", [(3, 6)])
def test_generative(param1, param2):
> assert param1 * 2 < param2
E assert (3 * 2) < 6
failure_demo.py:21: AssertionError
_________________________ TestFailing.test_simple __________________________
self = <failure_demo.TestFailing object at 0xdeadbeef0001>
def test_simple(self):
def f():
return 42
def g():
return 43
> assert f() == g()
E assert 42 == 43
E + where 42 = <function TestFailing.test_simple.<locals>.f at 0xdeadbeef0002>()
E + and 43 = <function TestFailing.test_simple.<locals>.g at 0xdeadbeef0003>()
failure_demo.py:32: AssertionError
____________________ TestFailing.test_simple_multiline _____________________
self = <failure_demo.TestFailing object at 0xdeadbeef0004>
def test_simple_multiline(self):
> otherfunc_multi(42, 6 * 9)
failure_demo.py:35:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
a = 42, b = 54
def otherfunc_multi(a, b):
> assert a == b
E assert 42 == 54
failure_demo.py:16: AssertionError
___________________________ TestFailing.test_not ___________________________
self = <failure_demo.TestFailing object at 0xdeadbeef0005>
def test_not(self):
def f():
return 42
> assert not f()
E assert not 42
E + where 42 = <function TestFailing.test_not.<locals>.f at 0xdeadbeef0006>()
failure_demo.py:41: AssertionError
_________________ TestSpecialisedExplanations.test_eq_text _________________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0007>
def test_eq_text(self):
> assert "spam" == "eggs"
E AssertionError: assert 'spam' == 'eggs'
E
E - eggs
E + spam
failure_demo.py:46: AssertionError
_____________ TestSpecialisedExplanations.test_eq_similar_text _____________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0008>
def test_eq_similar_text(self):
> assert "foo 1 bar" == "foo 2 bar"
E AssertionError: assert 'foo 1 bar' == 'foo 2 bar'
E
E - foo 2 bar
E ? ^
E + foo 1 bar
E ? ^
failure_demo.py:49: AssertionError
____________ TestSpecialisedExplanations.test_eq_multiline_text ____________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0009>
def test_eq_multiline_text(self):
> assert "foo\nspam\nbar" == "foo\neggs\nbar"
E AssertionError: assert 'foo\nspam\nbar' == 'foo\neggs\nbar'
E
E foo
E - eggs
E + spam
E bar
failure_demo.py:52: AssertionError
______________ TestSpecialisedExplanations.test_eq_long_text _______________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef000a>
def test_eq_long_text(self):
a = "1" * 100 + "a" + "2" * 100
b = "1" * 100 + "b" + "2" * 100
> assert a == b
E AssertionError: assert '111111111111...2222222222222' == '111111111111...2222222222222'
E
E Skipping 90 identical leading characters in diff, use -v to show
E Skipping 91 identical trailing characters in diff, use -v to show
E - 1111111111b222222222
E ? ^
E + 1111111111a222222222
E ? ^
failure_demo.py:57: AssertionError
_________ TestSpecialisedExplanations.test_eq_long_text_multiline __________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef000b>
def test_eq_long_text_multiline(self):
a = "1\n" * 100 + "a" + "2\n" * 100
b = "1\n" * 100 + "b" + "2\n" * 100
> assert a == b
E AssertionError: assert '1\n1\n1\n1\n...n2\n2\n2\n2\n' == '1\n1\n1\n1\n...n2\n2\n2\n2\n'
E
E Skipping 190 identical leading characters in diff, use -v to show
E Skipping 191 identical trailing characters in diff, use -v to show
E 1
E 1
E 1
E 1...
E
E ...Full output truncated (7 lines hidden), use '-vv' to show
failure_demo.py:62: AssertionError
_________________ TestSpecialisedExplanations.test_eq_list _________________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef000c>
def test_eq_list(self):
> assert [0, 1, 2] == [0, 1, 3]
E assert [0, 1, 2] == [0, 1, 3]
E
E At index 2 diff: 2 != 3
E Use -v to get more diff
failure_demo.py:65: AssertionError
______________ TestSpecialisedExplanations.test_eq_list_long _______________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef000d>
def test_eq_list_long(self):
a = [0] * 100 + [1] + [3] * 100
b = [0] * 100 + [2] + [3] * 100
> assert a == b
E assert [0, 0, 0, 0, 0, 0, ...] == [0, 0, 0, 0, 0, 0, ...]
E
E At index 100 diff: 1 != 2
E Use -v to get more diff
failure_demo.py:70: AssertionError
_________________ TestSpecialisedExplanations.test_eq_dict _________________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef000e>
def test_eq_dict(self):
> assert {"a": 0, "b": 1, "c": 0} == {"a": 0, "b": 2, "d": 0}
E AssertionError: assert {'a': 0, 'b': 1, 'c': 0} == {'a': 0, 'b': 2, 'd': 0}
E
E Omitting 1 identical items, use -vv to show
E Differing items:
E {'b': 1} != {'b': 2}
E Left contains 1 more item:
E {'c': 0}
E Right contains 1 more item:
E {'d': 0}
E Use -v to get more diff
failure_demo.py:73: AssertionError
_________________ TestSpecialisedExplanations.test_eq_set __________________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef000f>
def test_eq_set(self):
> assert {0, 10, 11, 12} == {0, 20, 21}
E assert {0, 10, 11, 12} == {0, 20, 21}
E
E Extra items in the left set:
E 10
E 11
E 12
E Extra items in the right set:
E 20
E 21
E Use -v to get more diff
failure_demo.py:76: AssertionError
_____________ TestSpecialisedExplanations.test_eq_longer_list ______________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0010>
def test_eq_longer_list(self):
> assert [1, 2] == [1, 2, 3]
E assert [1, 2] == [1, 2, 3]
E
E Right contains one more item: 3
E Use -v to get more diff
failure_demo.py:79: AssertionError
_________________ TestSpecialisedExplanations.test_in_list _________________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0011>
def test_in_list(self):
> assert 1 in [0, 2, 3, 4, 5]
E assert 1 in [0, 2, 3, 4, 5]
failure_demo.py:82: AssertionError
__________ TestSpecialisedExplanations.test_not_in_text_multiline __________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0012>
def test_not_in_text_multiline(self):
text = "some multiline\ntext\nwhich\nincludes foo\nand a\ntail"
> assert "foo" not in text
E AssertionError: assert 'foo' not in 'some multil...nand a\ntail'
E
E 'foo' is contained here:
E some multiline
E text
E which
E includes foo
E ? +++
E and a
E tail
failure_demo.py:86: AssertionError
___________ TestSpecialisedExplanations.test_not_in_text_single ____________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0013>
def test_not_in_text_single(self):
text = "single foo line"
> assert "foo" not in text
E AssertionError: assert 'foo' not in 'single foo line'
E
E 'foo' is contained here:
E single foo line
E ? +++
failure_demo.py:90: AssertionError
_________ TestSpecialisedExplanations.test_not_in_text_single_long _________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0014>
def test_not_in_text_single_long(self):
text = "head " * 50 + "foo " + "tail " * 20
> assert "foo" not in text
E AssertionError: assert 'foo' not in 'head head h...l tail tail '
E
E 'foo' is contained here:
E head head foo tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail
E ? +++
failure_demo.py:94: AssertionError
______ TestSpecialisedExplanations.test_not_in_text_single_long_term _______
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0015>
def test_not_in_text_single_long_term(self):
text = "head " * 50 + "f" * 70 + "tail " * 20
> assert "f" * 70 not in text
E AssertionError: assert 'fffffffffff...ffffffffffff' not in 'head head h...l tail tail '
E
E 'ffffffffffffffffff...fffffffffffffffffff' is contained here:
E head head fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffftail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail
E ? ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
failure_demo.py:98: AssertionError
______________ TestSpecialisedExplanations.test_eq_dataclass _______________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0016>
def test_eq_dataclass(self):
from dataclasses import dataclass
@dataclass
class Foo:
a: int
b: str
left = Foo(1, "b")
right = Foo(1, "c")
> assert left == right
E AssertionError: assert TestSpecialis...oo(a=1, b='b') == TestSpecialis...oo(a=1, b='c')
E
E Omitting 1 identical items, use -vv to show
E Differing attributes:
E ['b']
E
E Drill down into differing attribute b:
E b: 'b' != 'c'
E - c
E + b
failure_demo.py:110: AssertionError
________________ TestSpecialisedExplanations.test_eq_attrs _________________
self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef0017>
def test_eq_attrs(self):
import attr
@attr.s
class Foo:
a = attr.ib()
b = attr.ib()
left = Foo(1, "b")
right = Foo(1, "c")
> assert left == right
E AssertionError: assert Foo(a=1, b='b') == Foo(a=1, b='c')
E
E Omitting 1 identical items, use -vv to show
E Differing attributes:
E ['b']
E
E Drill down into differing attribute b:
E b: 'b' != 'c'
E - c
E + b
failure_demo.py:122: AssertionError
______________________________ test_attribute ______________________________
def test_attribute():
class Foo:
b = 1
i = Foo()
> assert i.b == 2
E assert 1 == 2
E + where 1 = <failure_demo.test_attribute.<locals>.Foo object at 0xdeadbeef0018>.b
failure_demo.py:130: AssertionError
_________________________ test_attribute_instance __________________________
def test_attribute_instance():
class Foo:
b = 1
> assert Foo().b == 2
E AssertionError: assert 1 == 2
E + where 1 = <failure_demo.test_attribute_instance.<locals>.Foo object at 0xdeadbeef0019>.b
E + where <failure_demo.test_attribute_instance.<locals>.Foo object at 0xdeadbeef0019> = <class 'failure_demo.test_attribute_instance.<locals>.Foo'>()
failure_demo.py:137: AssertionError
__________________________ test_attribute_failure __________________________
def test_attribute_failure():
class Foo:
def _get_b(self):
raise Exception("Failed to get attrib")
b = property(_get_b)
i = Foo()
> assert i.b == 2
^^^
failure_demo.py:148:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <failure_demo.test_attribute_failure.<locals>.Foo object at 0xdeadbeef001a>
def _get_b(self):
> raise Exception("Failed to get attrib")
E Exception: Failed to get attrib
failure_demo.py:143: Exception
_________________________ test_attribute_multiple __________________________
def test_attribute_multiple():
class Foo:
b = 1
class Bar:
b = 2
> assert Foo().b == Bar().b
E AssertionError: assert 1 == 2
E + where 1 = <failure_demo.test_attribute_multiple.<locals>.Foo object at 0xdeadbeef001b>.b
E + where <failure_demo.test_attribute_multiple.<locals>.Foo object at 0xdeadbeef001b> = <class 'failure_demo.test_attribute_multiple.<locals>.Foo'>()
E + and 2 = <failure_demo.test_attribute_multiple.<locals>.Bar object at 0xdeadbeef001c>.b
E + where <failure_demo.test_attribute_multiple.<locals>.Bar object at 0xdeadbeef001c> = <class 'failure_demo.test_attribute_multiple.<locals>.Bar'>()
failure_demo.py:158: AssertionError
__________________________ TestRaises.test_raises __________________________
self = <failure_demo.TestRaises object at 0xdeadbeef001d>
def test_raises(self):
s = "qwe"
> raises(TypeError, int, s)
E ValueError: invalid literal for int() with base 10: 'qwe'
failure_demo.py:168: ValueError
______________________ TestRaises.test_raises_doesnt _______________________
self = <failure_demo.TestRaises object at 0xdeadbeef001e>
def test_raises_doesnt(self):
> raises(OSError, int, "3")
E Failed: DID NOT RAISE <class 'OSError'>
failure_demo.py:171: Failed
__________________________ TestRaises.test_raise ___________________________
self = <failure_demo.TestRaises object at 0xdeadbeef001f>
def test_raise(self):
> raise ValueError("demo error")
E ValueError: demo error
failure_demo.py:174: ValueError
________________________ TestRaises.test_tupleerror ________________________
self = <failure_demo.TestRaises object at 0xdeadbeef0020>
def test_tupleerror(self):
> a, b = [1] # noqa: F841
^^^^
E ValueError: not enough values to unpack (expected 2, got 1)
failure_demo.py:177: ValueError
______ TestRaises.test_reinterpret_fails_with_print_for_the_fun_of_it ______
self = <failure_demo.TestRaises object at 0xdeadbeef0021>
def test_reinterpret_fails_with_print_for_the_fun_of_it(self):
items = [1, 2, 3]
print(f"items is {items!r}")
> a, b = items.pop()
^^^^
E TypeError: cannot unpack non-iterable int object
failure_demo.py:182: TypeError
--------------------------- Captured stdout call ---------------------------
items is [1, 2, 3]
________________________ TestRaises.test_some_error ________________________
self = <failure_demo.TestRaises object at 0xdeadbeef0022>
def test_some_error(self):
> if namenotexi: # noqa: F821
^^^^^^^^^^
E NameError: name 'namenotexi' is not defined
failure_demo.py:185: NameError
____________________ test_dynamic_compile_shows_nicely _____________________
def test_dynamic_compile_shows_nicely():
import importlib.util
import sys
src = "def foo():\n assert 1 == 0\n"
name = "abc-123"
spec = importlib.util.spec_from_loader(name, loader=None)
module = importlib.util.module_from_spec(spec)
code = compile(src, name, "exec")
exec(code, module.__dict__)
sys.modules[name] = module
> module.foo()
failure_demo.py:204:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> ???
E AssertionError
abc-123:2: AssertionError
____________________ TestMoreErrors.test_complex_error _____________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef0023>
def test_complex_error(self):
def f():
return 44
def g():
return 43
> somefunc(f(), g())
failure_demo.py:215:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
failure_demo.py:12: in somefunc
otherfunc(x, y)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
a = 44, b = 43
def otherfunc(a, b):
> assert a == b
E assert 44 == 43
failure_demo.py:8: AssertionError
___________________ TestMoreErrors.test_z1_unpack_error ____________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef0024>
def test_z1_unpack_error(self):
items = []
> a, b = items
^^^^
E ValueError: not enough values to unpack (expected 2, got 0)
failure_demo.py:219: ValueError
____________________ TestMoreErrors.test_z2_type_error _____________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef0025>
def test_z2_type_error(self):
items = 3
> a, b = items
^^^^
E TypeError: cannot unpack non-iterable int object
failure_demo.py:223: TypeError
______________________ TestMoreErrors.test_startswith ______________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef0026>
def test_startswith(self):
s = "123"
g = "456"
> assert s.startswith(g)
E AssertionError: assert False
E + where False = <built-in method startswith of str object at 0xdeadbeef0027>('456')
E + where <built-in method startswith of str object at 0xdeadbeef0027> = '123'.startswith
failure_demo.py:228: AssertionError
__________________ TestMoreErrors.test_startswith_nested ___________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef0028>
def test_startswith_nested(self):
def f():
return "123"
def g():
return "456"
> assert f().startswith(g())
E AssertionError: assert False
E + where False = <built-in method startswith of str object at 0xdeadbeef0027>('456')
E + where <built-in method startswith of str object at 0xdeadbeef0027> = '123'.startswith
E + where '123' = <function TestMoreErrors.test_startswith_nested.<locals>.f at 0xdeadbeef0029>()
E + and '456' = <function TestMoreErrors.test_startswith_nested.<locals>.g at 0xdeadbeef002a>()
failure_demo.py:237: AssertionError
_____________________ TestMoreErrors.test_global_func ______________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef002b>
def test_global_func(self):
> assert isinstance(globf(42), float)
E assert False
E + where False = isinstance(43, float)
E + where 43 = globf(42)
failure_demo.py:240: AssertionError
_______________________ TestMoreErrors.test_instance _______________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef002c>
def test_instance(self):
self.x = 6 * 7
> assert self.x != 42
E assert 42 != 42
E + where 42 = <failure_demo.TestMoreErrors object at 0xdeadbeef002c>.x
failure_demo.py:244: AssertionError
_______________________ TestMoreErrors.test_compare ________________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef002d>
def test_compare(self):
> assert globf(10) < 5
E assert 11 < 5
E + where 11 = globf(10)
failure_demo.py:247: AssertionError
_____________________ TestMoreErrors.test_try_finally ______________________
self = <failure_demo.TestMoreErrors object at 0xdeadbeef002e>
def test_try_finally(self):
x = 1
try:
> assert x == 0
E assert 1 == 0
failure_demo.py:252: AssertionError
___________________ TestCustomAssertMsg.test_single_line ___________________
self = <failure_demo.TestCustomAssertMsg object at 0xdeadbeef002f>
def test_single_line(self):
class A:
a = 1
b = 2
> assert A.a == b, "A.a appears not to be b"
E AssertionError: A.a appears not to be b
E assert 1 == 2
E + where 1 = <class 'failure_demo.TestCustomAssertMsg.test_single_line.<locals>.A'>.a
failure_demo.py:263: AssertionError
____________________ TestCustomAssertMsg.test_multiline ____________________
self = <failure_demo.TestCustomAssertMsg object at 0xdeadbeef0030>
def test_multiline(self):
class A:
a = 1
b = 2
> assert A.a == b, (
"A.a appears not to be b\nor does not appear to be b\none of those"
)
E AssertionError: A.a appears not to be b
E or does not appear to be b
E one of those
E assert 1 == 2
E + where 1 = <class 'failure_demo.TestCustomAssertMsg.test_multiline.<locals>.A'>.a
failure_demo.py:270: AssertionError
___________________ TestCustomAssertMsg.test_custom_repr ___________________
self = <failure_demo.TestCustomAssertMsg object at 0xdeadbeef0031>
def test_custom_repr(self):
class JSON:
a = 1
def __repr__(self):
return "This is JSON\n{\n 'foo': 'bar'\n}"
a = JSON()
b = 2
> assert a.a == b, a
E AssertionError: This is JSON
E {
E 'foo': 'bar'
E }
E assert 1 == 2
E + where 1 = This is JSON\n{\n 'foo': 'bar'\n}.a
failure_demo.py:283: AssertionError
========================= short test summary info ==========================
FAILED failure_demo.py::test_generative[3-6] - assert (3 * 2) < 6
FAILED failure_demo.py::TestFailing::test_simple - assert 42 == 43
FAILED failure_demo.py::TestFailing::test_simple_multiline - assert 42 == 54
FAILED failure_demo.py::TestFailing::test_not - assert not 42
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_text - Asser...
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_similar_text
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_multiline_text
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_long_text - ...
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_long_text_multiline
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_list - asser...
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_list_long - ...
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_dict - Asser...
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_set - assert...
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_longer_list
FAILED failure_demo.py::TestSpecialisedExplanations::test_in_list - asser...
FAILED failure_demo.py::TestSpecialisedExplanations::test_not_in_text_multiline
FAILED failure_demo.py::TestSpecialisedExplanations::test_not_in_text_single
FAILED failure_demo.py::TestSpecialisedExplanations::test_not_in_text_single_long
FAILED failure_demo.py::TestSpecialisedExplanations::test_not_in_text_single_long_term
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_dataclass - ...
FAILED failure_demo.py::TestSpecialisedExplanations::test_eq_attrs - Asse...
FAILED failure_demo.py::test_attribute - assert 1 == 2
FAILED failure_demo.py::test_attribute_instance - AssertionError: assert ...
FAILED failure_demo.py::test_attribute_failure - Exception: Failed to get...
FAILED failure_demo.py::test_attribute_multiple - AssertionError: assert ...
FAILED failure_demo.py::TestRaises::test_raises - ValueError: invalid lit...
FAILED failure_demo.py::TestRaises::test_raises_doesnt - Failed: DID NOT ...
FAILED failure_demo.py::TestRaises::test_raise - ValueError: demo error
FAILED failure_demo.py::TestRaises::test_tupleerror - ValueError: not eno...
FAILED failure_demo.py::TestRaises::test_reinterpret_fails_with_print_for_the_fun_of_it
FAILED failure_demo.py::TestRaises::test_some_error - NameError: name 'na...
FAILED failure_demo.py::test_dynamic_compile_shows_nicely - AssertionError
FAILED failure_demo.py::TestMoreErrors::test_complex_error - assert 44 == 43
FAILED failure_demo.py::TestMoreErrors::test_z1_unpack_error - ValueError...
FAILED failure_demo.py::TestMoreErrors::test_z2_type_error - TypeError: c...
FAILED failure_demo.py::TestMoreErrors::test_startswith - AssertionError:...
FAILED failure_demo.py::TestMoreErrors::test_startswith_nested - Assertio...
FAILED failure_demo.py::TestMoreErrors::test_global_func - assert False
FAILED failure_demo.py::TestMoreErrors::test_instance - assert 42 != 42
FAILED failure_demo.py::TestMoreErrors::test_compare - assert 11 < 5
FAILED failure_demo.py::TestMoreErrors::test_try_finally - assert 1 == 0
FAILED failure_demo.py::TestCustomAssertMsg::test_single_line - Assertion...
FAILED failure_demo.py::TestCustomAssertMsg::test_multiline - AssertionEr...
FAILED failure_demo.py::TestCustomAssertMsg::test_custom_repr - Assertion...
============================ 44 failed in 0.12s ============================
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