test_ok2/testing/test_assertion.py

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import collections
import sys
import textwrap
from typing import Any
from typing import List
from typing import MutableSequence
from typing import Optional
import attr
import _pytest.assertion as plugin
import pytest
from _pytest import outcomes
from _pytest.assertion import truncate
from _pytest.assertion import util
from _pytest.monkeypatch import MonkeyPatch
from _pytest.pytester import Pytester
def mock_config(verbose=0):
class Config:
def getoption(self, name):
if name == "verbose":
return verbose
raise KeyError("Not mocked out: %s" % name)
return Config()
class TestImportHookInstallation:
@pytest.mark.parametrize("initial_conftest", [True, False])
@pytest.mark.parametrize("mode", ["plain", "rewrite"])
def test_conftest_assertion_rewrite(
self, pytester: Pytester, initial_conftest, mode
) -> None:
"""Test that conftest files are using assertion rewrite on import (#1619)."""
pytester.mkdir("foo")
pytester.mkdir("foo/tests")
conftest_path = "conftest.py" if initial_conftest else "foo/conftest.py"
contents = {
conftest_path: """
import pytest
@pytest.fixture
def check_first():
def check(values, value):
assert values.pop(0) == value
return check
""",
"foo/tests/test_foo.py": """
def test(check_first):
check_first([10, 30], 30)
""",
}
pytester.makepyfile(**contents)
result = pytester.runpytest_subprocess("--assert=%s" % mode)
if mode == "plain":
expected = "E AssertionError"
elif mode == "rewrite":
expected = "*assert 10 == 30*"
else:
assert 0
result.stdout.fnmatch_lines([expected])
def test_rewrite_assertions_pytester_plugin(self, pytester: Pytester) -> None:
"""
Assertions in the pytester plugin must also benefit from assertion
rewriting (#1920).
"""
pytester.makepyfile(
"""
pytest_plugins = ['pytester']
def test_dummy_failure(pytester): # how meta!
pytester.makepyfile('def test(): assert 0')
r = pytester.inline_run()
r.assertoutcome(passed=1)
"""
)
result = pytester.runpytest_subprocess()
result.stdout.fnmatch_lines(
[
"> r.assertoutcome(passed=1)",
"E AssertionError: ([[][]], [[][]], [[]<TestReport *>[]])*",
"E assert {'failed': 1,... 'skipped': 0} == {'failed': 0,... 'skipped': 0}",
"E Omitting 1 identical items, use -vv to show",
"E Differing items:",
"E Use -v to get more diff",
]
)
# XXX: unstable output.
result.stdout.fnmatch_lines_random(
[
"E {'failed': 1} != {'failed': 0}",
"E {'passed': 0} != {'passed': 1}",
]
)
@pytest.mark.parametrize("mode", ["plain", "rewrite"])
def test_pytest_plugins_rewrite(self, pytester: Pytester, mode) -> None:
contents = {
"conftest.py": """
pytest_plugins = ['ham']
""",
"ham.py": """
import pytest
@pytest.fixture
def check_first():
def check(values, value):
assert values.pop(0) == value
return check
""",
"test_foo.py": """
def test_foo(check_first):
check_first([10, 30], 30)
""",
}
pytester.makepyfile(**contents)
result = pytester.runpytest_subprocess("--assert=%s" % mode)
if mode == "plain":
expected = "E AssertionError"
elif mode == "rewrite":
expected = "*assert 10 == 30*"
else:
assert 0
result.stdout.fnmatch_lines([expected])
@pytest.mark.parametrize("mode", ["str", "list"])
def test_pytest_plugins_rewrite_module_names(
self, pytester: Pytester, mode
) -> None:
"""Test that pluginmanager correct marks pytest_plugins variables
for assertion rewriting if they are defined as plain strings or
list of strings (#1888).
"""
plugins = '"ham"' if mode == "str" else '["ham"]'
contents = {
"conftest.py": """
pytest_plugins = {plugins}
""".format(
plugins=plugins
),
"ham.py": """
import pytest
""",
"test_foo.py": """
def test_foo(pytestconfig):
assert 'ham' in pytestconfig.pluginmanager.rewrite_hook._must_rewrite
""",
}
pytester.makepyfile(**contents)
result = pytester.runpytest_subprocess("--assert=rewrite")
assert result.ret == 0
def test_pytest_plugins_rewrite_module_names_correctly(
self, pytester: Pytester
) -> None:
"""Test that we match files correctly when they are marked for rewriting (#2939)."""
contents = {
"conftest.py": """\
pytest_plugins = "ham"
""",
"ham.py": "",
"hamster.py": "",
"test_foo.py": """\
def test_foo(pytestconfig):
assert pytestconfig.pluginmanager.rewrite_hook.find_spec('ham') is not None
assert pytestconfig.pluginmanager.rewrite_hook.find_spec('hamster') is None
""",
}
pytester.makepyfile(**contents)
result = pytester.runpytest_subprocess("--assert=rewrite")
assert result.ret == 0
@pytest.mark.parametrize("mode", ["plain", "rewrite"])
def test_installed_plugin_rewrite(
self, pytester: Pytester, mode, monkeypatch
) -> None:
monkeypatch.delenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD", raising=False)
# Make sure the hook is installed early enough so that plugins
# installed via setuptools are rewritten.
pytester.mkdir("hampkg")
contents = {
"hampkg/__init__.py": """\
import pytest
@pytest.fixture
def check_first2():
def check(values, value):
assert values.pop(0) == value
return check
""",
"spamplugin.py": """\
import pytest
from hampkg import check_first2
@pytest.fixture
def check_first():
def check(values, value):
assert values.pop(0) == value
return check
""",
"mainwrapper.py": """\
import pytest
from _pytest.compat import importlib_metadata
class DummyEntryPoint(object):
name = 'spam'
module_name = 'spam.py'
group = 'pytest11'
def load(self):
import spamplugin
return spamplugin
class DummyDistInfo(object):
version = '1.0'
files = ('spamplugin.py', 'hampkg/__init__.py')
entry_points = (DummyEntryPoint(),)
metadata = {'name': 'foo'}
def distributions():
return (DummyDistInfo(),)
importlib_metadata.distributions = distributions
pytest.main()
""",
"test_foo.py": """\
def test(check_first):
check_first([10, 30], 30)
def test2(check_first2):
check_first([10, 30], 30)
""",
}
pytester.makepyfile(**contents)
result = pytester.run(
sys.executable, "mainwrapper.py", "-s", "--assert=%s" % mode
)
if mode == "plain":
expected = "E AssertionError"
elif mode == "rewrite":
expected = "*assert 10 == 30*"
else:
assert 0
result.stdout.fnmatch_lines([expected])
def test_rewrite_ast(self, pytester: Pytester) -> None:
pytester.mkdir("pkg")
contents = {
"pkg/__init__.py": """
import pytest
pytest.register_assert_rewrite('pkg.helper')
""",
"pkg/helper.py": """
def tool():
a, b = 2, 3
assert a == b
""",
"pkg/plugin.py": """
import pytest, pkg.helper
@pytest.fixture
def tool():
return pkg.helper.tool
""",
"pkg/other.py": """
values = [3, 2]
def tool():
assert values.pop() == 3
""",
"conftest.py": """
pytest_plugins = ['pkg.plugin']
""",
"test_pkg.py": """
import pkg.other
def test_tool(tool):
tool()
def test_other():
pkg.other.tool()
""",
}
pytester.makepyfile(**contents)
result = pytester.runpytest_subprocess("--assert=rewrite")
result.stdout.fnmatch_lines(
[
">*assert a == b*",
"E*assert 2 == 3*",
">*assert values.pop() == 3*",
"E*AssertionError",
]
)
def test_register_assert_rewrite_checks_types(self) -> None:
with pytest.raises(TypeError):
pytest.register_assert_rewrite(["pytest_tests_internal_non_existing"]) # type: ignore
pytest.register_assert_rewrite(
"pytest_tests_internal_non_existing", "pytest_tests_internal_non_existing2"
)
class TestBinReprIntegration:
def test_pytest_assertrepr_compare_called(self, pytester: Pytester) -> None:
pytester.makeconftest(
"""
import pytest
values = []
def pytest_assertrepr_compare(op, left, right):
values.append((op, left, right))
@pytest.fixture
def list(request):
return values
"""
)
pytester.makepyfile(
"""
def test_hello():
assert 0 == 1
def test_check(list):
assert list == [("==", 0, 1)]
"""
)
result = pytester.runpytest("-v")
result.stdout.fnmatch_lines(["*test_hello*FAIL*", "*test_check*PASS*"])
def callop(op: str, left: Any, right: Any, verbose: int = 0) -> Optional[List[str]]:
config = mock_config(verbose=verbose)
return plugin.pytest_assertrepr_compare(config, op, left, right)
def callequal(left: Any, right: Any, verbose: int = 0) -> Optional[List[str]]:
return callop("==", left, right, verbose)
class TestAssert_reprcompare:
def test_different_types(self) -> None:
assert callequal([0, 1], "foo") is None
def test_summary(self) -> None:
lines = callequal([0, 1], [0, 2])
assert lines is not None
summary = lines[0]
assert len(summary) < 65
def test_text_diff(self) -> None:
assert callequal("spam", "eggs") == [
"'spam' == 'eggs'",
"- eggs",
"+ spam",
]
def test_text_skipping(self) -> None:
lines = callequal("a" * 50 + "spam", "a" * 50 + "eggs")
assert lines is not None
assert "Skipping" in lines[1]
for line in lines:
assert "a" * 50 not in line
def test_text_skipping_verbose(self) -> None:
lines = callequal("a" * 50 + "spam", "a" * 50 + "eggs", verbose=1)
assert lines is not None
assert "- " + "a" * 50 + "eggs" in lines
assert "+ " + "a" * 50 + "spam" in lines
def test_multiline_text_diff(self) -> None:
left = "foo\nspam\nbar"
right = "foo\neggs\nbar"
diff = callequal(left, right)
assert diff is not None
assert "- eggs" in diff
assert "+ spam" in diff
def test_bytes_diff_normal(self) -> None:
"""Check special handling for bytes diff (#5260)"""
diff = callequal(b"spam", b"eggs")
assert diff == [
"b'spam' == b'eggs'",
"At index 0 diff: b's' != b'e'",
"Use -v to get more diff",
]
def test_bytes_diff_verbose(self) -> None:
"""Check special handling for bytes diff (#5260)"""
diff = callequal(b"spam", b"eggs", verbose=1)
assert diff == [
"b'spam' == b'eggs'",
"At index 0 diff: b's' != b'e'",
"Full diff:",
"- b'eggs'",
"+ b'spam'",
]
def test_list(self) -> None:
expl = callequal([0, 1], [0, 2])
assert expl is not None
assert len(expl) > 1
@pytest.mark.parametrize(
["left", "right", "expected"],
[
pytest.param(
[0, 1],
[0, 2],
"""
Full diff:
- [0, 2]
? ^
+ [0, 1]
? ^
""",
id="lists",
),
pytest.param(
{0: 1},
{0: 2},
"""
Full diff:
- {0: 2}
? ^
+ {0: 1}
? ^
""",
id="dicts",
),
pytest.param(
{0, 1},
{0, 2},
"""
Full diff:
- {0, 2}
? ^
+ {0, 1}
? ^
""",
id="sets",
),
],
)
def test_iterable_full_diff(self, left, right, expected) -> None:
"""Test the full diff assertion failure explanation.
When verbose is False, then just a -v notice to get the diff is rendered,
when verbose is True, then ndiff of the pprint is returned.
"""
expl = callequal(left, right, verbose=0)
assert expl is not None
assert expl[-1] == "Use -v to get more diff"
verbose_expl = callequal(left, right, verbose=1)
assert verbose_expl is not None
assert "\n".join(verbose_expl).endswith(textwrap.dedent(expected).strip())
def test_iterable_quiet(self) -> None:
expl = callequal([1, 2], [10, 2], verbose=-1)
assert expl == [
"[1, 2] == [10, 2]",
"At index 0 diff: 1 != 10",
"Use -v to get more diff",
]
def test_iterable_full_diff_ci(
self, monkeypatch: MonkeyPatch, pytester: Pytester
) -> None:
pytester.makepyfile(
r"""
def test_full_diff():
left = [0, 1]
right = [0, 2]
assert left == right
"""
)
monkeypatch.setenv("CI", "true")
result = pytester.runpytest()
result.stdout.fnmatch_lines(["E Full diff:"])
monkeypatch.delenv("CI", raising=False)
result = pytester.runpytest()
result.stdout.fnmatch_lines(["E Use -v to get more diff"])
def test_list_different_lengths(self) -> None:
expl = callequal([0, 1], [0, 1, 2])
assert expl is not None
assert len(expl) > 1
expl = callequal([0, 1, 2], [0, 1])
assert expl is not None
assert len(expl) > 1
def test_list_wrap_for_multiple_lines(self) -> None:
long_d = "d" * 80
l1 = ["a", "b", "c"]
l2 = ["a", "b", "c", long_d]
diff = callequal(l1, l2, verbose=True)
assert diff == [
"['a', 'b', 'c'] == ['a', 'b', 'c...dddddddddddd']",
"Right contains one more item: '" + long_d + "'",
"Full diff:",
" [",
" 'a',",
" 'b',",
" 'c',",
"- '" + long_d + "',",
" ]",
]
diff = callequal(l2, l1, verbose=True)
assert diff == [
"['a', 'b', 'c...dddddddddddd'] == ['a', 'b', 'c']",
"Left contains one more item: '" + long_d + "'",
"Full diff:",
" [",
" 'a',",
" 'b',",
" 'c',",
"+ '" + long_d + "',",
" ]",
]
def test_list_wrap_for_width_rewrap_same_length(self) -> None:
long_a = "a" * 30
long_b = "b" * 30
long_c = "c" * 30
l1 = [long_a, long_b, long_c]
l2 = [long_b, long_c, long_a]
diff = callequal(l1, l2, verbose=True)
assert diff == [
"['aaaaaaaaaaa...cccccccccccc'] == ['bbbbbbbbbbb...aaaaaaaaaaaa']",
"At index 0 diff: 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' != 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbb'",
"Full diff:",
" [",
"+ 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',",
" 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbb',",
" 'cccccccccccccccccccccccccccccc',",
"- 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',",
" ]",
]
def test_list_dont_wrap_strings(self) -> None:
long_a = "a" * 10
l1 = ["a"] + [long_a for _ in range(0, 7)]
l2 = ["should not get wrapped"]
diff = callequal(l1, l2, verbose=True)
assert diff == [
"['a', 'aaaaaa...aaaaaaa', ...] == ['should not get wrapped']",
"At index 0 diff: 'a' != 'should not get wrapped'",
"Left contains 7 more items, first extra item: 'aaaaaaaaaa'",
"Full diff:",
" [",
"- 'should not get wrapped',",
"+ 'a',",
"+ 'aaaaaaaaaa',",
"+ 'aaaaaaaaaa',",
"+ 'aaaaaaaaaa',",
"+ 'aaaaaaaaaa',",
"+ 'aaaaaaaaaa',",
"+ 'aaaaaaaaaa',",
"+ 'aaaaaaaaaa',",
" ]",
]
def test_dict_wrap(self) -> None:
d1 = {"common": 1, "env": {"env1": 1, "env2": 2}}
d2 = {"common": 1, "env": {"env1": 1}}
diff = callequal(d1, d2, verbose=True)
assert diff == [
"{'common': 1,...1, 'env2': 2}} == {'common': 1,...: {'env1': 1}}",
"Omitting 1 identical items, use -vv to show",
"Differing items:",
"{'env': {'env1': 1, 'env2': 2}} != {'env': {'env1': 1}}",
"Full diff:",
"- {'common': 1, 'env': {'env1': 1}}",
"+ {'common': 1, 'env': {'env1': 1, 'env2': 2}}",
"? +++++++++++",
]
long_a = "a" * 80
sub = {"long_a": long_a, "sub1": {"long_a": "substring that gets wrapped " * 2}}
d1 = {"env": {"sub": sub}}
d2 = {"env": {"sub": sub}, "new": 1}
diff = callequal(d1, d2, verbose=True)
assert diff == [
"{'env': {'sub... wrapped '}}}} == {'env': {'sub...}}}, 'new': 1}",
"Omitting 1 identical items, use -vv to show",
"Right contains 1 more item:",
"{'new': 1}",
"Full diff:",
" {",
" 'env': {'sub': {'long_a': '" + long_a + "',",
" 'sub1': {'long_a': 'substring that gets wrapped substring '",
" 'that gets wrapped '}}},",
"- 'new': 1,",
" }",
]
def test_dict(self) -> None:
expl = callequal({"a": 0}, {"a": 1})
assert expl is not None
assert len(expl) > 1
def test_dict_omitting(self) -> None:
lines = callequal({"a": 0, "b": 1}, {"a": 1, "b": 1})
assert lines is not None
assert lines[1].startswith("Omitting 1 identical item")
assert "Common items" not in lines
for line in lines[1:]:
assert "b" not in line
def test_dict_omitting_with_verbosity_1(self) -> None:
"""Ensure differing items are visible for verbosity=1 (#1512)."""
lines = callequal({"a": 0, "b": 1}, {"a": 1, "b": 1}, verbose=1)
assert lines is not None
assert lines[1].startswith("Omitting 1 identical item")
assert lines[2].startswith("Differing items")
assert lines[3] == "{'a': 0} != {'a': 1}"
assert "Common items" not in lines
def test_dict_omitting_with_verbosity_2(self) -> None:
lines = callequal({"a": 0, "b": 1}, {"a": 1, "b": 1}, verbose=2)
assert lines is not None
assert lines[1].startswith("Common items:")
assert "Omitting" not in lines[1]
assert lines[2] == "{'b': 1}"
def test_dict_different_items(self) -> None:
lines = callequal({"a": 0}, {"b": 1, "c": 2}, verbose=2)
assert lines == [
"{'a': 0} == {'b': 1, 'c': 2}",
"Left contains 1 more item:",
"{'a': 0}",
"Right contains 2 more items:",
"{'b': 1, 'c': 2}",
"Full diff:",
"- {'b': 1, 'c': 2}",
"+ {'a': 0}",
]
lines = callequal({"b": 1, "c": 2}, {"a": 0}, verbose=2)
assert lines == [
"{'b': 1, 'c': 2} == {'a': 0}",
"Left contains 2 more items:",
"{'b': 1, 'c': 2}",
"Right contains 1 more item:",
"{'a': 0}",
"Full diff:",
"- {'a': 0}",
"+ {'b': 1, 'c': 2}",
]
def test_sequence_different_items(self) -> None:
lines = callequal((1, 2), (3, 4, 5), verbose=2)
assert lines == [
"(1, 2) == (3, 4, 5)",
"At index 0 diff: 1 != 3",
"Right contains one more item: 5",
"Full diff:",
"- (3, 4, 5)",
"+ (1, 2)",
]
lines = callequal((1, 2, 3), (4,), verbose=2)
assert lines == [
"(1, 2, 3) == (4,)",
"At index 0 diff: 1 != 4",
"Left contains 2 more items, first extra item: 2",
"Full diff:",
"- (4,)",
"+ (1, 2, 3)",
]
def test_set(self) -> None:
expl = callequal({0, 1}, {0, 2})
assert expl is not None
assert len(expl) > 1
def test_frozenzet(self) -> None:
expl = callequal(frozenset([0, 1]), {0, 2})
assert expl is not None
assert len(expl) > 1
def test_Sequence(self) -> None:
# Test comparing with a Sequence subclass.
class TestSequence(MutableSequence[int]):
def __init__(self, iterable):
self.elements = list(iterable)
def __getitem__(self, item):
return self.elements[item]
def __len__(self):
return len(self.elements)
def __setitem__(self, item, value):
pass
def __delitem__(self, item):
pass
def insert(self, item, index):
pass
expl = callequal(TestSequence([0, 1]), list([0, 2]))
assert expl is not None
assert len(expl) > 1
def test_list_tuples(self) -> None:
expl = callequal([], [(1, 2)])
assert expl is not None
assert len(expl) > 1
expl = callequal([(1, 2)], [])
assert expl is not None
assert len(expl) > 1
def test_list_bad_repr(self) -> None:
class A:
def __repr__(self):
raise ValueError(42)
expl = callequal([], [A()])
assert expl is not None
assert "ValueError" in "".join(expl)
expl = callequal({}, {"1": A()}, verbose=2)
assert expl is not None
assert expl[0].startswith("{} == <[ValueError")
assert "raised in repr" in expl[0]
assert expl[1:] == [
"(pytest_assertion plugin: representation of details failed:"
" {}:{}: ValueError: 42.".format(
__file__, A.__repr__.__code__.co_firstlineno + 1
),
" Probably an object has a faulty __repr__.)",
]
def test_one_repr_empty(self) -> None:
"""The faulty empty string repr did trigger an unbound local error in _diff_text."""
class A(str):
def __repr__(self):
return ""
expl = callequal(A(), "")
assert not expl
def test_repr_no_exc(self) -> None:
expl = callequal("foo", "bar")
assert expl is not None
assert "raised in repr()" not in " ".join(expl)
def test_unicode(self) -> None:
assert callequal("£€", "£") == [
"'£€' == '£'",
"- £",
"+ £€",
]
def test_nonascii_text(self) -> None:
"""
:issue: 877
non ascii python2 str caused a UnicodeDecodeError
"""
class A(str):
def __repr__(self):
return "\xff"
expl = callequal(A(), "1")
assert expl == ["ÿ == '1'", "- 1"]
def test_format_nonascii_explanation(self) -> None:
assert util.format_explanation("λ")
def test_mojibake(self) -> None:
# issue 429
left = b"e"
right = b"\xc3\xa9"
expl = callequal(left, right)
assert expl is not None
for line in expl:
assert isinstance(line, str)
msg = "\n".join(expl)
assert msg
def test_nfc_nfd_same_string(self) -> None:
# issue 3426
left = "hyv\xe4"
right = "hyva\u0308"
expl = callequal(left, right)
assert expl == [
r"'hyv\xe4' == 'hyva\u0308'",
f"- {str(right)}",
f"+ {str(left)}",
]
expl = callequal(left, right, verbose=2)
assert expl == [
r"'hyv\xe4' == 'hyva\u0308'",
f"- {str(right)}",
f"+ {str(left)}",
]
class TestAssert_reprcompare_dataclass:
def test_dataclasses(self, pytester: Pytester) -> None:
p = pytester.copy_example("dataclasses/test_compare_dataclasses.py")
result = pytester.runpytest(p)
result.assert_outcomes(failed=1, passed=0)
result.stdout.fnmatch_lines(
[
"E Omitting 1 identical items, use -vv to show",
"E Differing attributes:",
"E ['field_b']",
"E ",
"E Drill down into differing attribute field_b:",
"E field_b: 'b' != 'c'",
"E - c",
"E + b",
],
consecutive=True,
)
def test_recursive_dataclasses(self, pytester: Pytester) -> None:
p = pytester.copy_example("dataclasses/test_compare_recursive_dataclasses.py")
result = pytester.runpytest(p)
result.assert_outcomes(failed=1, passed=0)
result.stdout.fnmatch_lines(
[
"E Omitting 1 identical items, use -vv to show",
"E Differing attributes:",
"E ['g', 'h', 'j']",
"E ",
"E Drill down into differing attribute g:",
"E g: S(a=10, b='ten') != S(a=20, b='xxx')...",
"E ",
"E ...Full output truncated (51 lines hidden), use '-vv' to show",
],
consecutive=True,
)
def test_recursive_dataclasses_verbose(self, pytester: Pytester) -> None:
p = pytester.copy_example("dataclasses/test_compare_recursive_dataclasses.py")
result = pytester.runpytest(p, "-vv")
result.assert_outcomes(failed=1, passed=0)
result.stdout.fnmatch_lines(
[
"E Matching attributes:",
"E ['i']",
"E Differing attributes:",
"E ['g', 'h', 'j']",
"E ",
"E Drill down into differing attribute g:",
"E g: S(a=10, b='ten') != S(a=20, b='xxx')",
"E ",
"E Differing attributes:",
"E ['a', 'b']",
"E ",
"E Drill down into differing attribute a:",
"E a: 10 != 20",
"E ",
"E Drill down into differing attribute b:",
"E b: 'ten' != 'xxx'",
"E - xxx",
"E + ten",
"E ",
"E Drill down into differing attribute h:",
],
consecutive=True,
)
def test_dataclasses_verbose(self, pytester: Pytester) -> None:
p = pytester.copy_example("dataclasses/test_compare_dataclasses_verbose.py")
result = pytester.runpytest(p, "-vv")
result.assert_outcomes(failed=1, passed=0)
result.stdout.fnmatch_lines(
[
"*Matching attributes:*",
"*['field_a']*",
"*Differing attributes:*",
"*field_b: 'b' != 'c'*",
]
)
def test_dataclasses_with_attribute_comparison_off(
self, pytester: Pytester
) -> None:
p = pytester.copy_example(
"dataclasses/test_compare_dataclasses_field_comparison_off.py"
)
result = pytester.runpytest(p, "-vv")
result.assert_outcomes(failed=0, passed=1)
def test_comparing_two_different_data_classes(self, pytester: Pytester) -> None:
p = pytester.copy_example(
"dataclasses/test_compare_two_different_dataclasses.py"
)
result = pytester.runpytest(p, "-vv")
result.assert_outcomes(failed=0, passed=1)
def test_data_classes_with_custom_eq(self, pytester: Pytester) -> None:
p = pytester.copy_example(
"dataclasses/test_compare_dataclasses_with_custom_eq.py"
)
# issue 9362
result = pytester.runpytest(p, "-vv")
result.assert_outcomes(failed=1, passed=0)
result.stdout.no_re_match_line(".*Differing attributes.*")
def test_data_classes_with_initvar(self, pytester: Pytester) -> None:
p = pytester.copy_example("dataclasses/test_compare_initvar.py")
# issue 9820
result = pytester.runpytest(p, "-vv")
result.assert_outcomes(failed=1, passed=0)
result.stdout.no_re_match_line(".*AttributeError.*")
class TestAssert_reprcompare_attrsclass:
def test_attrs(self) -> None:
@attr.s
class SimpleDataObject:
field_a = attr.ib()
field_b = attr.ib()
left = SimpleDataObject(1, "b")
right = SimpleDataObject(1, "c")
lines = callequal(left, right)
assert lines is not None
assert lines[2].startswith("Omitting 1 identical item")
assert "Matching attributes" not in lines
for line in lines[2:]:
assert "field_a" not in line
def test_attrs_recursive(self) -> None:
@attr.s
class OtherDataObject:
field_c = attr.ib()
field_d = attr.ib()
@attr.s
class SimpleDataObject:
field_a = attr.ib()
field_b = attr.ib()
left = SimpleDataObject(OtherDataObject(1, "a"), "b")
right = SimpleDataObject(OtherDataObject(1, "b"), "b")
lines = callequal(left, right)
assert lines is not None
assert "Matching attributes" not in lines
for line in lines[1:]:
assert "field_b:" not in line
assert "field_c:" not in line
def test_attrs_recursive_verbose(self) -> None:
@attr.s
class OtherDataObject:
field_c = attr.ib()
field_d = attr.ib()
@attr.s
class SimpleDataObject:
field_a = attr.ib()
field_b = attr.ib()
left = SimpleDataObject(OtherDataObject(1, "a"), "b")
right = SimpleDataObject(OtherDataObject(1, "b"), "b")
lines = callequal(left, right)
assert lines is not None
# indentation in output because of nested object structure
assert " field_d: 'a' != 'b'" in lines
def test_attrs_verbose(self) -> None:
@attr.s
class SimpleDataObject:
field_a = attr.ib()
field_b = attr.ib()
left = SimpleDataObject(1, "b")
right = SimpleDataObject(1, "c")
lines = callequal(left, right, verbose=2)
assert lines is not None
assert lines[2].startswith("Matching attributes:")
assert "Omitting" not in lines[2]
assert lines[3] == "['field_a']"
def test_attrs_with_attribute_comparison_off(self) -> None:
@attr.s
class SimpleDataObject:
field_a = attr.ib()
field_b = attr.ib(eq=False)
left = SimpleDataObject(1, "b")
right = SimpleDataObject(1, "b")
lines = callequal(left, right, verbose=2)
assert lines is not None
assert lines[2].startswith("Matching attributes:")
assert "Omitting" not in lines[1]
assert lines[3] == "['field_a']"
for line in lines[3:]:
assert "field_b" not in line
def test_comparing_two_different_attrs_classes(self) -> None:
@attr.s
class SimpleDataObjectOne:
field_a = attr.ib()
field_b = attr.ib()
@attr.s
class SimpleDataObjectTwo:
field_a = attr.ib()
field_b = attr.ib()
left = SimpleDataObjectOne(1, "b")
right = SimpleDataObjectTwo(1, "c")
lines = callequal(left, right)
assert lines is None
def test_attrs_with_auto_detect_and_custom_eq(self) -> None:
@attr.s(
auto_detect=True
) # attr.s doesnt ignore a custom eq if auto_detect=True
class SimpleDataObject:
field_a = attr.ib()
def __eq__(self, other): # pragma: no cover
return super().__eq__(other)
left = SimpleDataObject(1)
right = SimpleDataObject(2)
# issue 9362
lines = callequal(left, right, verbose=2)
assert lines is None
def test_attrs_with_custom_eq(self) -> None:
@attr.define(slots=False)
class SimpleDataObject:
field_a = attr.ib()
def __eq__(self, other): # pragma: no cover
return super().__eq__(other)
left = SimpleDataObject(1)
right = SimpleDataObject(2)
# issue 9362
lines = callequal(left, right, verbose=2)
assert lines is None
class TestAssert_reprcompare_namedtuple:
def test_namedtuple(self) -> None:
NT = collections.namedtuple("NT", ["a", "b"])
left = NT(1, "b")
right = NT(1, "c")
lines = callequal(left, right)
assert lines == [
"NT(a=1, b='b') == NT(a=1, b='c')",
"",
"Omitting 1 identical items, use -vv to show",
"Differing attributes:",
"['b']",
"",
"Drill down into differing attribute b:",
" b: 'b' != 'c'",
" - c",
" + b",
"Use -v to get more diff",
]
def test_comparing_two_different_namedtuple(self) -> None:
NT1 = collections.namedtuple("NT1", ["a", "b"])
NT2 = collections.namedtuple("NT2", ["a", "b"])
left = NT1(1, "b")
right = NT2(2, "b")
lines = callequal(left, right)
# Because the types are different, uses the generic sequence matcher.
assert lines == [
"NT1(a=1, b='b') == NT2(a=2, b='b')",
"At index 0 diff: 1 != 2",
"Use -v to get more diff",
]
class TestFormatExplanation:
def test_special_chars_full(self, pytester: Pytester) -> None:
# Issue 453, for the bug this would raise IndexError
pytester.makepyfile(
"""
def test_foo():
assert '\\n}' == ''
"""
)
result = pytester.runpytest()
assert result.ret == 1
result.stdout.fnmatch_lines(["*AssertionError*"])
def test_fmt_simple(self) -> None:
expl = "assert foo"
assert util.format_explanation(expl) == "assert foo"
def test_fmt_where(self) -> None:
expl = "\n".join(["assert 1", "{1 = foo", "} == 2"])
res = "\n".join(["assert 1 == 2", " + where 1 = foo"])
assert util.format_explanation(expl) == res
def test_fmt_and(self) -> None:
expl = "\n".join(["assert 1", "{1 = foo", "} == 2", "{2 = bar", "}"])
res = "\n".join(["assert 1 == 2", " + where 1 = foo", " + and 2 = bar"])
assert util.format_explanation(expl) == res
def test_fmt_where_nested(self) -> None:
expl = "\n".join(["assert 1", "{1 = foo", "{foo = bar", "}", "} == 2"])
res = "\n".join(["assert 1 == 2", " + where 1 = foo", " + where foo = bar"])
assert util.format_explanation(expl) == res
def test_fmt_newline(self) -> None:
expl = "\n".join(['assert "foo" == "bar"', "~- foo", "~+ bar"])
res = "\n".join(['assert "foo" == "bar"', " - foo", " + bar"])
assert util.format_explanation(expl) == res
def test_fmt_newline_escaped(self) -> None:
expl = "\n".join(["assert foo == bar", "baz"])
res = "assert foo == bar\\nbaz"
assert util.format_explanation(expl) == res
def test_fmt_newline_before_where(self) -> None:
expl = "\n".join(
[
"the assertion message here",
">assert 1",
"{1 = foo",
"} == 2",
"{2 = bar",
"}",
]
)
res = "\n".join(
[
"the assertion message here",
"assert 1 == 2",
" + where 1 = foo",
" + and 2 = bar",
]
)
assert util.format_explanation(expl) == res
def test_fmt_multi_newline_before_where(self) -> None:
expl = "\n".join(
[
"the assertion",
"~message here",
">assert 1",
"{1 = foo",
"} == 2",
"{2 = bar",
"}",
]
)
res = "\n".join(
[
"the assertion",
" message here",
"assert 1 == 2",
" + where 1 = foo",
" + and 2 = bar",
]
)
assert util.format_explanation(expl) == res
class TestTruncateExplanation:
# The number of lines in the truncation explanation message. Used
# to calculate that results have the expected length.
LINES_IN_TRUNCATION_MSG = 2
def test_doesnt_truncate_when_input_is_empty_list(self) -> None:
expl: List[str] = []
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=100)
assert result == expl
def test_doesnt_truncate_at_when_input_is_5_lines_and_LT_max_chars(self) -> None:
expl = ["a" * 100 for x in range(5)]
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=8 * 80)
assert result == expl
def test_truncates_at_8_lines_when_given_list_of_empty_strings(self) -> None:
expl = ["" for x in range(50)]
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=100)
assert len(result) != len(expl)
assert result != expl
assert len(result) == 8 + self.LINES_IN_TRUNCATION_MSG
assert "Full output truncated" in result[-1]
assert "42 lines hidden" in result[-1]
last_line_before_trunc_msg = result[-self.LINES_IN_TRUNCATION_MSG - 1]
assert last_line_before_trunc_msg.endswith("...")
def test_truncates_at_8_lines_when_first_8_lines_are_LT_max_chars(self) -> None:
total_lines = 100
expl = ["a" for x in range(total_lines)]
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=8 * 80)
assert result != expl
assert len(result) == 8 + self.LINES_IN_TRUNCATION_MSG
assert "Full output truncated" in result[-1]
assert f"{total_lines - 8} lines hidden" in result[-1]
last_line_before_trunc_msg = result[-self.LINES_IN_TRUNCATION_MSG - 1]
assert last_line_before_trunc_msg.endswith("...")
def test_truncates_at_8_lines_when_there_is_one_line_to_remove(self) -> None:
"""The number of line in the result is 9, the same number as if we truncated."""
expl = ["a" for x in range(9)]
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=8 * 80)
assert result == expl
assert "truncated" not in result[-1]
def test_truncates_edgecase_when_truncation_message_makes_the_result_longer_for_chars(
self,
) -> None:
line = "a" * 10
expl = [line, line]
result = truncate._truncate_explanation(expl, max_lines=10, max_chars=10)
assert result == [line, line]
def test_truncates_edgecase_when_truncation_message_makes_the_result_longer_for_lines(
self,
) -> None:
line = "a" * 10
expl = [line, line]
result = truncate._truncate_explanation(expl, max_lines=1, max_chars=100)
assert result == [line, line]
def test_truncates_at_8_lines_when_first_8_lines_are_EQ_max_chars(self) -> None:
expl = [chr(97 + x) * 80 for x in range(16)]
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=8 * 80)
assert result != expl
assert len(result) == 16 - 8 + self.LINES_IN_TRUNCATION_MSG
assert "Full output truncated" in result[-1]
assert "8 lines hidden" in result[-1]
last_line_before_trunc_msg = result[-self.LINES_IN_TRUNCATION_MSG - 1]
assert last_line_before_trunc_msg.endswith("...")
def test_truncates_at_4_lines_when_first_4_lines_are_GT_max_chars(self) -> None:
expl = ["a" * 250 for x in range(10)]
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=999)
assert result != expl
assert len(result) == 4 + self.LINES_IN_TRUNCATION_MSG
assert "Full output truncated" in result[-1]
assert "7 lines hidden" in result[-1]
last_line_before_trunc_msg = result[-self.LINES_IN_TRUNCATION_MSG - 1]
assert last_line_before_trunc_msg.endswith("...")
def test_truncates_at_1_line_when_first_line_is_GT_max_chars(self) -> None:
expl = ["a" * 250 for x in range(1000)]
result = truncate._truncate_explanation(expl, max_lines=8, max_chars=100)
assert result != expl
assert len(result) == 1 + self.LINES_IN_TRUNCATION_MSG
assert "Full output truncated" in result[-1]
assert "1000 lines hidden" in result[-1]
last_line_before_trunc_msg = result[-self.LINES_IN_TRUNCATION_MSG - 1]
assert last_line_before_trunc_msg.endswith("...")
def test_full_output_truncated(self, monkeypatch, pytester: Pytester) -> None:
"""Test against full runpytest() output."""
line_count = 7
line_len = 100
expected_truncated_lines = 1
pytester.makepyfile(
r"""
def test_many_lines():
a = list([str(i)[0] * %d for i in range(%d)])
b = a[::2]
a = '\n'.join(map(str, a))
b = '\n'.join(map(str, b))
assert a == b
"""
% (line_len, line_count)
)
monkeypatch.delenv("CI", raising=False)
result = pytester.runpytest()
# without -vv, truncate the message showing a few diff lines only
result.stdout.fnmatch_lines(
[
"*+ 1*",
"*+ 3*",
"*+ 5*",
"*truncated (%d line hidden)*use*-vv*" % expected_truncated_lines,
]
)
result = pytester.runpytest("-vv")
result.stdout.fnmatch_lines(["* 6*"])
monkeypatch.setenv("CI", "1")
result = pytester.runpytest()
result.stdout.fnmatch_lines(["* 6*"])
def test_python25_compile_issue257(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_rewritten():
assert 1 == 2
# some comment
"""
)
result = pytester.runpytest()
assert result.ret == 1
result.stdout.fnmatch_lines(
"""
*E*assert 1 == 2*
*1 failed*
"""
)
def test_rewritten(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_rewritten():
assert "@py_builtins" in globals()
"""
)
assert pytester.runpytest().ret == 0
def test_reprcompare_notin() -> None:
assert callop("not in", "foo", "aaafoobbb") == [
"'foo' not in 'aaafoobbb'",
"'foo' is contained here:",
" aaafoobbb",
"? +++",
]
def test_reprcompare_whitespaces() -> None:
assert callequal("\r\n", "\n") == [
r"'\r\n' == '\n'",
r"Strings contain only whitespace, escaping them using repr()",
r"- '\n'",
r"+ '\r\n'",
r"? ++",
]
def test_pytest_assertrepr_compare_integration(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_hello():
x = set(range(100))
y = x.copy()
y.remove(50)
assert x == y
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(
[
"*def test_hello():*",
"*assert x == y*",
"*E*Extra items*left*",
"*E*50*",
"*= 1 failed in*",
]
)
def test_sequence_comparison_uses_repr(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_hello():
x = set("hello x")
y = set("hello y")
assert x == y
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(
[
"*def test_hello():*",
"*assert x == y*",
"*E*Extra items*left*",
"*E*'x'*",
"*E*Extra items*right*",
"*E*'y'*",
]
)
def test_assertrepr_loaded_per_dir(pytester: Pytester) -> None:
pytester.makepyfile(test_base=["def test_base(): assert 1 == 2"])
a = pytester.mkdir("a")
a.joinpath("test_a.py").write_text("def test_a(): assert 1 == 2")
a.joinpath("conftest.py").write_text(
'def pytest_assertrepr_compare(): return ["summary a"]'
)
b = pytester.mkdir("b")
b.joinpath("test_b.py").write_text("def test_b(): assert 1 == 2")
b.joinpath("conftest.py").write_text(
'def pytest_assertrepr_compare(): return ["summary b"]'
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(
[
"*def test_base():*",
"*E*assert 1 == 2*",
"*def test_a():*",
"*E*assert summary a*",
"*def test_b():*",
"*E*assert summary b*",
]
)
def test_assertion_options(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_hello():
x = 3
assert x == 4
"""
)
result = pytester.runpytest()
assert "3 == 4" in result.stdout.str()
result = pytester.runpytest_subprocess("--assert=plain")
result.stdout.no_fnmatch_line("*3 == 4*")
def test_triple_quoted_string_issue113(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_hello():
assert "" == '''
'''"""
)
result = pytester.runpytest("--fulltrace")
result.stdout.fnmatch_lines(["*1 failed*"])
result.stdout.no_fnmatch_line("*SyntaxError*")
def test_traceback_failure(pytester: Pytester) -> None:
p1 = pytester.makepyfile(
"""
def g():
return 2
def f(x):
assert x == g()
def test_onefails():
f(3)
"""
)
result = pytester.runpytest(p1, "--tb=long")
result.stdout.fnmatch_lines(
[
"*test_traceback_failure.py F*",
"====* FAILURES *====",
"____*____",
"",
" def test_onefails():",
"> f(3)",
"",
"*test_*.py:6: ",
"_ _ _ *",
# "",
" def f(x):",
"> assert x == g()",
"E assert 3 == 2",
"E + where 2 = g()",
"",
"*test_traceback_failure.py:4: AssertionError",
]
)
result = pytester.runpytest(p1) # "auto"
result.stdout.fnmatch_lines(
[
"*test_traceback_failure.py F*",
"====* FAILURES *====",
"____*____",
"",
" def test_onefails():",
"> f(3)",
"",
"*test_*.py:6: ",
"",
" def f(x):",
"> assert x == g()",
"E assert 3 == 2",
"E + where 2 = g()",
"",
"*test_traceback_failure.py:4: AssertionError",
]
)
def test_exception_handling_no_traceback(pytester: Pytester) -> None:
"""Handle chain exceptions in tasks submitted by the multiprocess module (#1984)."""
p1 = pytester.makepyfile(
"""
from multiprocessing import Pool
def process_task(n):
assert n == 10
def multitask_job():
tasks = [1]
with Pool(processes=1) as pool:
pool.map(process_task, tasks)
def test_multitask_job():
multitask_job()
"""
)
pytester.syspathinsert()
result = pytester.runpytest(p1, "--tb=long")
result.stdout.fnmatch_lines(
[
"====* FAILURES *====",
"*multiprocessing.pool.RemoteTraceback:*",
"Traceback (most recent call last):",
"*assert n == 10",
"The above exception was the direct cause of the following exception:",
"> * multitask_job()",
]
)
@pytest.mark.skipif("'__pypy__' in sys.builtin_module_names")
@pytest.mark.parametrize(
"cmdline_args, warning_output",
[
(
["-OO", "-m", "pytest", "-h"],
["warning :*PytestConfigWarning:*assert statements are not executed*"],
),
(
["-OO", "-m", "pytest"],
[
"=*= warnings summary =*=",
"*PytestConfigWarning:*assert statements are not executed*",
],
),
(
["-OO", "-m", "pytest", "--assert=plain"],
[
"=*= warnings summary =*=",
"*PytestConfigWarning: ASSERTIONS ARE NOT EXECUTED and FAILING TESTS WILL PASS. "
"Are you using python -O?",
],
),
],
)
def test_warn_missing(pytester: Pytester, cmdline_args, warning_output) -> None:
pytester.makepyfile("")
result = pytester.run(sys.executable, *cmdline_args)
result.stdout.fnmatch_lines(warning_output)
def test_recursion_source_decode(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_something():
pass
"""
)
pytester.makeini(
"""
[pytest]
python_files = *.py
"""
)
result = pytester.runpytest("--collect-only")
result.stdout.fnmatch_lines(
"""
<Module*>
"""
)
def test_AssertionError_message(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_hello():
x,y = 1,2
assert 0, (x,y)
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(
"""
*def test_hello*
*assert 0, (x,y)*
*AssertionError: (1, 2)*
"""
)
def test_diff_newline_at_end(pytester: Pytester) -> None:
pytester.makepyfile(
r"""
def test_diff():
assert 'asdf' == 'asdf\n'
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(
r"""
*assert 'asdf' == 'asdf\n'
* - asdf
* ? -
* + asdf
"""
)
@pytest.mark.filterwarnings("default")
def test_assert_tuple_warning(pytester: Pytester) -> None:
msg = "assertion is always true"
pytester.makepyfile(
"""
def test_tuple():
assert(False, 'you shall not pass')
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines([f"*test_assert_tuple_warning.py:2:*{msg}*"])
# tuples with size != 2 should not trigger the warning
pytester.makepyfile(
"""
def test_tuple():
assert ()
"""
)
result = pytester.runpytest()
assert msg not in result.stdout.str()
def test_assert_indirect_tuple_no_warning(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def test_tuple():
tpl = ('foo', 'bar')
assert tpl
"""
)
result = pytester.runpytest()
output = "\n".join(result.stdout.lines)
assert "WR1" not in output
def test_assert_with_unicode(pytester: Pytester) -> None:
pytester.makepyfile(
"""\
def test_unicode():
assert '유니코드' == 'Unicode'
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(["*AssertionError*"])
def test_raise_unprintable_assertion_error(pytester: Pytester) -> None:
pytester.makepyfile(
r"""
def test_raise_assertion_error():
raise AssertionError('\xff')
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(
[r"> raise AssertionError('\xff')", "E AssertionError: *"]
)
def test_raise_assertion_error_raising_repr(pytester: Pytester) -> None:
pytester.makepyfile(
"""
class RaisingRepr(object):
def __repr__(self):
raise Exception()
def test_raising_repr():
raise AssertionError(RaisingRepr())
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(["E AssertionError: <exception str() failed>"])
def test_issue_1944(pytester: Pytester) -> None:
pytester.makepyfile(
"""
def f():
return
assert f() == 10
"""
)
result = pytester.runpytest()
result.stdout.fnmatch_lines(["*1 error*"])
assert (
"AttributeError: 'Module' object has no attribute '_obj'"
not in result.stdout.str()
)
def test_exit_from_assertrepr_compare(monkeypatch) -> None:
def raise_exit(obj):
outcomes.exit("Quitting debugger")
monkeypatch.setattr(util, "istext", raise_exit)
with pytest.raises(outcomes.Exit, match="Quitting debugger"):
callequal(1, 1)
def test_assertion_location_with_coverage(pytester: Pytester) -> None:
"""This used to report the wrong location when run with coverage (#5754)."""
p = pytester.makepyfile(
"""
def test():
assert False, 1
assert False, 2
"""
)
result = pytester.runpytest(str(p))
result.stdout.fnmatch_lines(
[
"> assert False, 1",
"E AssertionError: 1",
"E assert False",
"*= 1 failed in*",
]
)
def test_reprcompare_verbose_long() -> None:
a = {f"v{i}": i for i in range(11)}
b = a.copy()
b["v2"] += 10
lines = callop("==", a, b, verbose=2)
assert lines is not None
assert lines[0] == (
"{'v0': 0, 'v1': 1, 'v2': 2, 'v3': 3, 'v4': 4, 'v5': 5, "
"'v6': 6, 'v7': 7, 'v8': 8, 'v9': 9, 'v10': 10}"
" == "
"{'v0': 0, 'v1': 1, 'v2': 12, 'v3': 3, 'v4': 4, 'v5': 5, "
"'v6': 6, 'v7': 7, 'v8': 8, 'v9': 9, 'v10': 10}"
)