659 lines
23 KiB
ReStructuredText
659 lines
23 KiB
ReStructuredText
.. _`tbreportdemo`:
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Demo of Python failure reports with pytest
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==========================================
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Here is a nice run of several failures and how ``pytest`` presents things:
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.. code-block:: pytest
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assertion $ pytest failure_demo.py
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=========================== test session starts ============================
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platform linux -- Python 3.x.y, pytest-4.x.y, py-1.x.y, pluggy-0.x.y
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cachedir: $PYTHON_PREFIX/.pytest_cache
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rootdir: $REGENDOC_TMPDIR/assertion
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collected 44 items
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failure_demo.py FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF [100%]
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================================= FAILURES =================================
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___________________________ test_generative[3-6] ___________________________
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param1 = 3, param2 = 6
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@pytest.mark.parametrize("param1, param2", [(3, 6)])
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def test_generative(param1, param2):
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> assert param1 * 2 < param2
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E assert (3 * 2) < 6
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failure_demo.py:20: AssertionError
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_________________________ TestFailing.test_simple __________________________
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self = <failure_demo.TestFailing object at 0xdeadbeef>
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def test_simple(self):
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def f():
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return 42
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def g():
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return 43
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> assert f() == g()
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E assert 42 == 43
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E + where 42 = <function TestFailing.test_simple.<locals>.f at 0xdeadbeef>()
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E + and 43 = <function TestFailing.test_simple.<locals>.g at 0xdeadbeef>()
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failure_demo.py:31: AssertionError
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____________________ TestFailing.test_simple_multiline _____________________
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self = <failure_demo.TestFailing object at 0xdeadbeef>
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def test_simple_multiline(self):
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> otherfunc_multi(42, 6 * 9)
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failure_demo.py:34:
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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a = 42, b = 54
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def otherfunc_multi(a, b):
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> assert a == b
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E assert 42 == 54
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failure_demo.py:15: AssertionError
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___________________________ TestFailing.test_not ___________________________
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self = <failure_demo.TestFailing object at 0xdeadbeef>
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def test_not(self):
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def f():
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return 42
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> assert not f()
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E assert not 42
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E + where 42 = <function TestFailing.test_not.<locals>.f at 0xdeadbeef>()
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failure_demo.py:40: AssertionError
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_________________ TestSpecialisedExplanations.test_eq_text _________________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_text(self):
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> assert "spam" == "eggs"
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E AssertionError: assert 'spam' == 'eggs'
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E - spam
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E + eggs
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failure_demo.py:45: AssertionError
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_____________ TestSpecialisedExplanations.test_eq_similar_text _____________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_similar_text(self):
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> assert "foo 1 bar" == "foo 2 bar"
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E AssertionError: assert 'foo 1 bar' == 'foo 2 bar'
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E - foo 1 bar
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E ? ^
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E + foo 2 bar
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E ? ^
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failure_demo.py:48: AssertionError
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____________ TestSpecialisedExplanations.test_eq_multiline_text ____________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_multiline_text(self):
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> assert "foo\nspam\nbar" == "foo\neggs\nbar"
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E AssertionError: assert 'foo\nspam\nbar' == 'foo\neggs\nbar'
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E foo
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E - spam
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E + eggs
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E bar
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failure_demo.py:51: AssertionError
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______________ TestSpecialisedExplanations.test_eq_long_text _______________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_long_text(self):
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a = "1" * 100 + "a" + "2" * 100
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b = "1" * 100 + "b" + "2" * 100
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> assert a == b
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E AssertionError: assert '111111111111...2222222222222' == '1111111111111...2222222222222'
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E Skipping 90 identical leading characters in diff, use -v to show
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E Skipping 91 identical trailing characters in diff, use -v to show
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E - 1111111111a222222222
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E ? ^
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E + 1111111111b222222222
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E ? ^
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failure_demo.py:56: AssertionError
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_________ TestSpecialisedExplanations.test_eq_long_text_multiline __________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_long_text_multiline(self):
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a = "1\n" * 100 + "a" + "2\n" * 100
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b = "1\n" * 100 + "b" + "2\n" * 100
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> assert a == b
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E AssertionError: assert '1\n1\n1\n1\n...n2\n2\n2\n2\n' == '1\n1\n1\n1\n1...n2\n2\n2\n2\n'
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E Skipping 190 identical leading characters in diff, use -v to show
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E Skipping 191 identical trailing characters in diff, use -v to show
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E 1
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E 1
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E 1
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E 1
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E 1...
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E
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E ...Full output truncated (7 lines hidden), use '-vv' to show
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failure_demo.py:61: AssertionError
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_________________ TestSpecialisedExplanations.test_eq_list _________________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_list(self):
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> assert [0, 1, 2] == [0, 1, 3]
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E assert [0, 1, 2] == [0, 1, 3]
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E At index 2 diff: 2 != 3
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E Use -v to get the full diff
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failure_demo.py:64: AssertionError
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______________ TestSpecialisedExplanations.test_eq_list_long _______________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_list_long(self):
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a = [0] * 100 + [1] + [3] * 100
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b = [0] * 100 + [2] + [3] * 100
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> assert a == b
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E assert [0, 0, 0, 0, 0, 0, ...] == [0, 0, 0, 0, 0, 0, ...]
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E At index 100 diff: 1 != 2
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E Use -v to get the full diff
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failure_demo.py:69: AssertionError
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_________________ TestSpecialisedExplanations.test_eq_dict _________________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_dict(self):
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> assert {"a": 0, "b": 1, "c": 0} == {"a": 0, "b": 2, "d": 0}
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E AssertionError: assert {'a': 0, 'b': 1, 'c': 0} == {'a': 0, 'b': 2, 'd': 0}
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E Omitting 1 identical items, use -vv to show
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E Differing items:
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E {'b': 1} != {'b': 2}
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E Left contains 1 more item:
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E {'c': 0}
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E Right contains 1 more item:
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E {'d': 0}...
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E
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E ...Full output truncated (2 lines hidden), use '-vv' to show
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failure_demo.py:72: AssertionError
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_________________ TestSpecialisedExplanations.test_eq_set __________________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_set(self):
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> assert {0, 10, 11, 12} == {0, 20, 21}
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E AssertionError: assert {0, 10, 11, 12} == {0, 20, 21}
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E Extra items in the left set:
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E 10
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E 11
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E 12
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E Extra items in the right set:
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E 20
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E 21...
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E
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E ...Full output truncated (2 lines hidden), use '-vv' to show
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failure_demo.py:75: AssertionError
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_____________ TestSpecialisedExplanations.test_eq_longer_list ______________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_longer_list(self):
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> assert [1, 2] == [1, 2, 3]
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E assert [1, 2] == [1, 2, 3]
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E Right contains one more item: 3
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E Use -v to get the full diff
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failure_demo.py:78: AssertionError
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_________________ TestSpecialisedExplanations.test_in_list _________________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_in_list(self):
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> assert 1 in [0, 2, 3, 4, 5]
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E assert 1 in [0, 2, 3, 4, 5]
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failure_demo.py:81: AssertionError
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__________ TestSpecialisedExplanations.test_not_in_text_multiline __________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_not_in_text_multiline(self):
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text = "some multiline\ntext\nwhich\nincludes foo\nand a\ntail"
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> assert "foo" not in text
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E AssertionError: assert 'foo' not in 'some multiline\ntext\nw...ncludes foo\nand a\ntail'
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E 'foo' is contained here:
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E some multiline
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E text
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E which
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E includes foo
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E ? +++
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E and a...
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E
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E ...Full output truncated (2 lines hidden), use '-vv' to show
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failure_demo.py:85: AssertionError
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___________ TestSpecialisedExplanations.test_not_in_text_single ____________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_not_in_text_single(self):
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text = "single foo line"
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> assert "foo" not in text
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E AssertionError: assert 'foo' not in 'single foo line'
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E 'foo' is contained here:
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E single foo line
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E ? +++
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failure_demo.py:89: AssertionError
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_________ TestSpecialisedExplanations.test_not_in_text_single_long _________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_not_in_text_single_long(self):
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text = "head " * 50 + "foo " + "tail " * 20
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> assert "foo" not in text
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E AssertionError: assert 'foo' not in 'head head head head hea...ail tail tail tail tail '
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E 'foo' is contained here:
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E head head foo tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail
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E ? +++
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failure_demo.py:93: AssertionError
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______ TestSpecialisedExplanations.test_not_in_text_single_long_term _______
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_not_in_text_single_long_term(self):
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text = "head " * 50 + "f" * 70 + "tail " * 20
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> assert "f" * 70 not in text
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E AssertionError: assert 'fffffffffff...ffffffffffff' not in 'head head he...l tail tail '
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E 'ffffffffffffffffff...fffffffffffffffffff' is contained here:
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E head head fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffftail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail tail
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E ? ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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failure_demo.py:97: AssertionError
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______________ TestSpecialisedExplanations.test_eq_dataclass _______________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_dataclass(self):
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from dataclasses import dataclass
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@dataclass
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class Foo:
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a: int
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b: str
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left = Foo(1, "b")
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right = Foo(1, "c")
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> assert left == right
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E AssertionError: assert TestSpecialis...oo(a=1, b='b') == TestSpecialise...oo(a=1, b='c')
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E Omitting 1 identical items, use -vv to show
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E Differing attributes:
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E b: 'b' != 'c'
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failure_demo.py:109: AssertionError
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________________ TestSpecialisedExplanations.test_eq_attrs _________________
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self = <failure_demo.TestSpecialisedExplanations object at 0xdeadbeef>
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def test_eq_attrs(self):
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import attr
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@attr.s
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class Foo:
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a = attr.ib()
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b = attr.ib()
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left = Foo(1, "b")
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right = Foo(1, "c")
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> assert left == right
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E AssertionError: assert Foo(a=1, b='b') == Foo(a=1, b='c')
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E Omitting 1 identical items, use -vv to show
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E Differing attributes:
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E b: 'b' != 'c'
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failure_demo.py:121: AssertionError
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______________________________ test_attribute ______________________________
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def test_attribute():
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class Foo:
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b = 1
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i = Foo()
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> assert i.b == 2
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E assert 1 == 2
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E + where 1 = <failure_demo.test_attribute.<locals>.Foo object at 0xdeadbeef>.b
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failure_demo.py:129: AssertionError
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_________________________ test_attribute_instance __________________________
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def test_attribute_instance():
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class Foo:
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b = 1
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> assert Foo().b == 2
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E AssertionError: assert 1 == 2
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E + where 1 = <failure_demo.test_attribute_instance.<locals>.Foo object at 0xdeadbeef>.b
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E + where <failure_demo.test_attribute_instance.<locals>.Foo object at 0xdeadbeef> = <class 'failure_demo.test_attribute_instance.<locals>.Foo'>()
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failure_demo.py:136: AssertionError
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__________________________ test_attribute_failure __________________________
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def test_attribute_failure():
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class Foo:
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def _get_b(self):
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raise Exception("Failed to get attrib")
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b = property(_get_b)
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i = Foo()
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> assert i.b == 2
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failure_demo.py:147:
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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self = <failure_demo.test_attribute_failure.<locals>.Foo object at 0xdeadbeef>
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def _get_b(self):
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> raise Exception("Failed to get attrib")
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E Exception: Failed to get attrib
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failure_demo.py:142: Exception
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_________________________ test_attribute_multiple __________________________
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def test_attribute_multiple():
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class Foo:
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b = 1
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class Bar:
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b = 2
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> assert Foo().b == Bar().b
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E AssertionError: assert 1 == 2
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E + where 1 = <failure_demo.test_attribute_multiple.<locals>.Foo object at 0xdeadbeef>.b
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E + where <failure_demo.test_attribute_multiple.<locals>.Foo object at 0xdeadbeef> = <class 'failure_demo.test_attribute_multiple.<locals>.Foo'>()
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E + and 2 = <failure_demo.test_attribute_multiple.<locals>.Bar object at 0xdeadbeef>.b
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E + where <failure_demo.test_attribute_multiple.<locals>.Bar object at 0xdeadbeef> = <class 'failure_demo.test_attribute_multiple.<locals>.Bar'>()
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failure_demo.py:157: AssertionError
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__________________________ TestRaises.test_raises __________________________
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self = <failure_demo.TestRaises object at 0xdeadbeef>
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def test_raises(self):
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s = "qwe"
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> raises(TypeError, int, s)
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E ValueError: invalid literal for int() with base 10: 'qwe'
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failure_demo.py:167: ValueError
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______________________ TestRaises.test_raises_doesnt _______________________
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self = <failure_demo.TestRaises object at 0xdeadbeef>
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def test_raises_doesnt(self):
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> raises(IOError, int, "3")
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E Failed: DID NOT RAISE <class 'OSError'>
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failure_demo.py:170: Failed
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__________________________ TestRaises.test_raise ___________________________
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self = <failure_demo.TestRaises object at 0xdeadbeef>
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def test_raise(self):
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> raise ValueError("demo error")
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E ValueError: demo error
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failure_demo.py:173: ValueError
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________________________ TestRaises.test_tupleerror ________________________
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self = <failure_demo.TestRaises object at 0xdeadbeef>
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def test_tupleerror(self):
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> a, b = [1] # NOQA
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E ValueError: not enough values to unpack (expected 2, got 1)
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failure_demo.py:176: ValueError
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______ TestRaises.test_reinterpret_fails_with_print_for_the_fun_of_it ______
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self = <failure_demo.TestRaises object at 0xdeadbeef>
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def test_reinterpret_fails_with_print_for_the_fun_of_it(self):
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items = [1, 2, 3]
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print("items is %r" % items)
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> a, b = items.pop()
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E TypeError: 'int' object is not iterable
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failure_demo.py:181: TypeError
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--------------------------- Captured stdout call ---------------------------
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items is [1, 2, 3]
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________________________ TestRaises.test_some_error ________________________
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self = <failure_demo.TestRaises object at 0xdeadbeef>
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def test_some_error(self):
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> if namenotexi: # NOQA
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E NameError: name 'namenotexi' is not defined
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failure_demo.py:184: NameError
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____________________ test_dynamic_compile_shows_nicely _____________________
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def test_dynamic_compile_shows_nicely():
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import imp
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import sys
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src = "def foo():\n assert 1 == 0\n"
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name = "abc-123"
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module = imp.new_module(name)
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code = _pytest._code.compile(src, name, "exec")
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exec(code, module.__dict__)
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sys.modules[name] = module
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> module.foo()
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failure_demo.py:202:
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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def foo():
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> assert 1 == 0
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E AssertionError
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<0-codegen 'abc-123' $REGENDOC_TMPDIR/assertion/failure_demo.py:199>:2: AssertionError
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____________________ TestMoreErrors.test_complex_error _____________________
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self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
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def test_complex_error(self):
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def f():
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return 44
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def g():
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return 43
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> somefunc(f(), g())
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failure_demo.py:213:
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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failure_demo.py:11: in somefunc
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otherfunc(x, y)
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_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
|
|
|
|
a = 44, b = 43
|
|
|
|
def otherfunc(a, b):
|
|
> assert a == b
|
|
E assert 44 == 43
|
|
|
|
failure_demo.py:7: AssertionError
|
|
___________________ TestMoreErrors.test_z1_unpack_error ____________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
def test_z1_unpack_error(self):
|
|
items = []
|
|
> a, b = items
|
|
E ValueError: not enough values to unpack (expected 2, got 0)
|
|
|
|
failure_demo.py:217: ValueError
|
|
____________________ TestMoreErrors.test_z2_type_error _____________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
def test_z2_type_error(self):
|
|
items = 3
|
|
> a, b = items
|
|
E TypeError: 'int' object is not iterable
|
|
|
|
failure_demo.py:221: TypeError
|
|
______________________ TestMoreErrors.test_startswith ______________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
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 0xdeadbeef>('456')
|
|
E + where <built-in method startswith of str object at 0xdeadbeef> = '123'.startswith
|
|
|
|
failure_demo.py:226: AssertionError
|
|
__________________ TestMoreErrors.test_startswith_nested ___________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
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 0xdeadbeef>('456')
|
|
E + where <built-in method startswith of str object at 0xdeadbeef> = '123'.startswith
|
|
E + where '123' = <function TestMoreErrors.test_startswith_nested.<locals>.f at 0xdeadbeef>()
|
|
E + and '456' = <function TestMoreErrors.test_startswith_nested.<locals>.g at 0xdeadbeef>()
|
|
|
|
failure_demo.py:235: AssertionError
|
|
_____________________ TestMoreErrors.test_global_func ______________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
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:238: AssertionError
|
|
_______________________ TestMoreErrors.test_instance _______________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
def test_instance(self):
|
|
self.x = 6 * 7
|
|
> assert self.x != 42
|
|
E assert 42 != 42
|
|
E + where 42 = <failure_demo.TestMoreErrors object at 0xdeadbeef>.x
|
|
|
|
failure_demo.py:242: AssertionError
|
|
_______________________ TestMoreErrors.test_compare ________________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
def test_compare(self):
|
|
> assert globf(10) < 5
|
|
E assert 11 < 5
|
|
E + where 11 = globf(10)
|
|
|
|
failure_demo.py:245: AssertionError
|
|
_____________________ TestMoreErrors.test_try_finally ______________________
|
|
|
|
self = <failure_demo.TestMoreErrors object at 0xdeadbeef>
|
|
|
|
def test_try_finally(self):
|
|
x = 1
|
|
try:
|
|
> assert x == 0
|
|
E assert 1 == 0
|
|
|
|
failure_demo.py:250: AssertionError
|
|
___________________ TestCustomAssertMsg.test_single_line ___________________
|
|
|
|
self = <failure_demo.TestCustomAssertMsg object at 0xdeadbeef>
|
|
|
|
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:261: AssertionError
|
|
____________________ TestCustomAssertMsg.test_multiline ____________________
|
|
|
|
self = <failure_demo.TestCustomAssertMsg object at 0xdeadbeef>
|
|
|
|
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:268: AssertionError
|
|
___________________ TestCustomAssertMsg.test_custom_repr ___________________
|
|
|
|
self = <failure_demo.TestCustomAssertMsg object at 0xdeadbeef>
|
|
|
|
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:281: AssertionError
|
|
============================= warnings summary =============================
|
|
failure_demo.py::test_dynamic_compile_shows_nicely
|
|
$REGENDOC_TMPDIR/assertion/failure_demo.py:193: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
|
|
import imp
|
|
|
|
-- Docs: https://docs.pytest.org/en/latest/warnings.html
|
|
================== 44 failed, 1 warnings in 0.12 seconds ===================
|