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Make dataclasses/attrs comparison recursive, fixes #4675

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This commit is contained in:
ibriquem
2020-06-02 15:38:41 +02:00
committed by Bruno Oliveira
parent 3de85a9ac9
commit e2e7f15b71
4 changed files with 142 additions and 21 deletions
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80
testing/test_assertion.py
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@@ -781,6 +781,48 @@ class TestAssert_reprcompare_dataclass:
"*Omitting 1 identical items, use -vv to show*",
"*Differing attributes:*",
"*field_b: 'b' != 'c'*",
"*- c*",
"*+ b*",
]
)
@pytest.mark.skipif(sys.version_info < (3, 7), reason="Dataclasses in Python3.7+")
def test_recursive_dataclasses(self, testdir):
p = testdir.copy_example("dataclasses/test_compare_recursive_dataclasses.py")
result = testdir.runpytest(p)
result.assert_outcomes(failed=1, passed=0)
result.stdout.fnmatch_lines(
[
"*Omitting 1 identical items, use -vv to show*",
"*Differing attributes:*",
"*field_b: ComplexDataObject2(*SimpleDataObject(field_a=2, field_b='c')) != ComplexDataObject2(*SimpleDataObject(field_a=3, field_b='c'))*", # noqa
"*Drill down into differing attribute field_b:*",
"*Omitting 1 identical items, use -vv to show*",
"*Differing attributes:*",
"*Full output truncated*",
]
)
@pytest.mark.skipif(sys.version_info < (3, 7), reason="Dataclasses in Python3.7+")
def test_recursive_dataclasses_verbose(self, testdir):
p = testdir.copy_example("dataclasses/test_compare_recursive_dataclasses.py")
result = testdir.runpytest(p, "-vv")
result.assert_outcomes(failed=1, passed=0)
result.stdout.fnmatch_lines(
[
"*Matching attributes:*",
"*['field_a']*",
"*Differing attributes:*",
"*field_b: ComplexDataObject2(*SimpleDataObject(field_a=2, field_b='c')) != ComplexDataObject2(*SimpleDataObject(field_a=3, field_b='c'))*", # noqa
"*Matching attributes:*",
"*['field_a']*",
"*Differing attributes:*",
"*field_b: SimpleDataObject(field_a=2, field_b='c') "
"!= SimpleDataObject(field_a=3, field_b='c')*",
"*Matching attributes:*",
"*['field_b']*",
"*Differing attributes:*",
"*field_a: 2 != 3",
]
)
@@ -832,6 +874,44 @@ class TestAssert_reprcompare_attrsclass:
for line in lines[1:]:
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 "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 "field_d: 'a' != 'b'" in lines
print("\n".join(lines))
def test_attrs_verbose(self) -> None:
@attr.s
class SimpleDataObject: