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test_assertion.py
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2521 lines (2222 loc) · 77.7 KB
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# mypy: allow-untyped-defs
from __future__ import annotations
from collections.abc import Iterator
from collections.abc import Mapping
from collections.abc import MutableSequence
import dataclasses
import sys
import textwrap
from typing import Any
from typing import NamedTuple
import attr
from _pytest import outcomes
import _pytest.assertion as plugin
from _pytest.assertion import truncate
from _pytest.assertion import util
from _pytest.assertion._compare_any import _compare_eq_cls
from _pytest.assertion.compare_text import _compare_eq_text
from _pytest.config import Config as _Config
from _pytest.monkeypatch import MonkeyPatch
from _pytest.pytester import Pytester
import pytest
def mock_config(
verbose: int = 0,
assertion_override: int | None = None,
assertion_text_diff_style: str = util.ASSERTION_TEXT_DIFF_STYLE_NDIFF,
):
class TerminalWriter:
def _highlight(self, source, lexer="python"):
return source
class PluginManager:
def has_plugin(self, name: str) -> bool:
return True
class Config:
pluginmanager = PluginManager()
def get_terminal_writer(self):
return TerminalWriter()
def get_verbosity(self, verbosity_type: str | None = None) -> int:
if verbosity_type is None:
return verbose
if verbosity_type == _Config.VERBOSITY_ASSERTIONS:
if assertion_override is not None:
return assertion_override
return verbose
raise KeyError(f"Not mocked out: {verbosity_type}")
def getini(self, name: str) -> str:
if name == util.ASSERTION_TEXT_DIFF_STYLE_INI:
return assertion_text_diff_style
raise KeyError(f"Not mocked out: {name}")
return Config()
class TestMockConfig:
SOME_VERBOSITY_LEVEL = 3
SOME_OTHER_VERBOSITY_LEVEL = 10
def test_verbose_exposes_value(self):
config = mock_config(verbose=TestMockConfig.SOME_VERBOSITY_LEVEL)
assert config.get_verbosity() == TestMockConfig.SOME_VERBOSITY_LEVEL
def test_get_assertion_override_not_set_verbose_value(self):
config = mock_config(verbose=TestMockConfig.SOME_VERBOSITY_LEVEL)
assert (
config.get_verbosity(_Config.VERBOSITY_ASSERTIONS)
== TestMockConfig.SOME_VERBOSITY_LEVEL
)
def test_get_assertion_override_set_custom_value(self):
config = mock_config(
verbose=TestMockConfig.SOME_VERBOSITY_LEVEL,
assertion_override=TestMockConfig.SOME_OTHER_VERBOSITY_LEVEL,
)
assert (
config.get_verbosity(_Config.VERBOSITY_ASSERTIONS)
== TestMockConfig.SOME_OTHER_VERBOSITY_LEVEL
)
def test_get_unsupported_type_error(self):
config = mock_config(verbose=TestMockConfig.SOME_VERBOSITY_LEVEL)
with pytest.raises(KeyError):
config.get_verbosity("--- NOT A VERBOSITY LEVEL ---")
def test_getini_unsupported_error(self):
config = mock_config()
with pytest.raises(KeyError, match="Not mocked out: --- NOT AN INI ---"):
config.getini("--- NOT AN INI ---")
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(f"--assert={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(f"--assert={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": f"""
pytest_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"])
@pytest.mark.parametrize("disable_plugin_autoload", ["env_var", "cli", ""])
@pytest.mark.parametrize("explicit_specify", ["env_var", "cli", ""])
def test_installed_plugin_rewrite(
self,
pytester: Pytester,
mode: str,
monkeypatch: pytest.MonkeyPatch,
disable_plugin_autoload: str,
explicit_specify: str,
) -> None:
args = ["mainwrapper.py", "-s", f"--assert={mode}"]
if disable_plugin_autoload == "env_var":
monkeypatch.setenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD", "1")
elif disable_plugin_autoload == "cli":
monkeypatch.delenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD", raising=False)
args.append("--disable-plugin-autoload")
else:
assert disable_plugin_autoload == ""
monkeypatch.delenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD", raising=False)
name = "spamplugin"
if explicit_specify == "env_var":
monkeypatch.setenv("PYTEST_PLUGINS", name)
elif explicit_specify == "cli":
args.append("-p")
args.append(name)
else:
assert explicit_specify == ""
# Make sure the hook is installed early enough so that plugins
# installed via distribution package 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 importlib.metadata
import pytest
class DummyEntryPoint(object):
name = 'spamplugin'
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_first2([10, 30], 30)
""",
}
pytester.makepyfile(**contents)
result = pytester.run(sys.executable, *args)
if mode == "plain":
expected = "E AssertionError"
elif mode == "rewrite":
expected = "*assert 10 == 30*"
else:
assert 0
if not disable_plugin_autoload or explicit_specify:
result.assert_outcomes(failed=2)
result.stdout.fnmatch_lines([expected, expected])
else:
result.assert_outcomes(errors=2)
result.stdout.fnmatch_lines(
[
"E fixture 'check_first' not found",
"E fixture 'check_first2' not found",
]
)
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,
assertion_text_diff_style: str = util.ASSERTION_TEXT_DIFF_STYLE_NDIFF,
) -> list[str] | None:
config = mock_config(
verbose=verbose,
assertion_text_diff_style=assertion_text_diff_style,
)
return plugin.pytest_assertrepr_compare(config, op, left, right)
def callequal(
left: Any,
right: Any,
verbose: int = 0,
assertion_text_diff_style: str = util.ASSERTION_TEXT_DIFF_STYLE_NDIFF,
) -> list[str] | None:
return callop(
"==",
left,
right,
verbose,
assertion_text_diff_style=assertion_text_diff_style,
)
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_diff_ndiff_style(self) -> None:
assert list(
_compare_eq_text(
"spam",
"eggs",
util.dummy_highlighter,
0,
util.ASSERTION_TEXT_DIFF_STYLE_NDIFF,
)
) == [
"- 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[2]
for line in lines:
assert "a" * 50 not in line
def test_text_skipping_trailing(self) -> None:
# Same length, differ at index 1, then ~50 identical trailing chars.
# Exercises the trailing-skip branch in ``_diff_text``.
lines = callequal("a" + "x" + "z" * 50, "a" + "y" + "z" * 50)
assert lines is not None
assert any("identical trailing" in line for line in lines)
for line in lines:
assert "z" * 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_multiline_text_diff_block(self) -> None:
assert callequal(
"foo\nspam\nbar",
"foo\neggs\nbar",
assertion_text_diff_style=util.ASSERTION_TEXT_DIFF_STYLE_BLOCK,
) == [
r"'foo\nspam\nbar' == 'foo\neggs\nbar'",
"",
"Left:",
" foo",
" spam",
" bar",
"",
"Right:",
" foo",
" eggs",
" bar",
]
def test_multiline_text_diff_block_preserves_blank_lines(self) -> None:
assert callequal(
"\nfoo\n",
"\nbar",
assertion_text_diff_style=util.ASSERTION_TEXT_DIFF_STYLE_BLOCK,
) == [
r"'\nfoo\n' == '\nbar'",
"",
"Left:",
" ",
" foo",
" ",
"",
"Right:",
" ",
" bar",
]
def test_single_line_text_diff_block(self) -> None:
assert callequal(
"spam",
"eggs",
assertion_text_diff_style=util.ASSERTION_TEXT_DIFF_STYLE_BLOCK,
) == [
"'spam' == 'eggs'",
"",
"Left:",
" spam",
"",
"Right:",
" eggs",
]
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,
? ^
+ 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,
? ^
+ 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:"])
# Setting CI to empty string is same as having it undefined
monkeypatch.setenv("CI", "")
result = pytester.runpytest()
result.stdout.fnmatch_lines(["E Use -v to get more 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(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,",
"+ 'env2': 2,",
" },",
" }",
]
long_a = "a" * 80
sub = {"long_a": long_a, "sub1": {"long_a": "substring that gets wrapped " * 3}}
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': {",
f" 'long_a': '{long_a}',",
" 'sub1': {",
" 'long_a': 'substring that gets wrapped 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[2].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] == ""
assert lines[2].startswith("Omitting 1 identical item")
assert lines[3].startswith("Differing items")
assert lines[4] == "{'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[2].startswith("Common items:")
assert "Omitting" not in lines[2]
assert lines[3] == "{'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,",
"? ^ ^",
"+ 'a': 0,",
"? ^ ^",
"- 'c': 2,",
" }",
]
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_mapping_different_items(self) -> None:
class SimpleMapping(Mapping[str, int]):
def __init__(self, values: dict[str, int]) -> None:
self._values = values
def __getitem__(self, key: str) -> int:
return self._values[key]
def __iter__(self) -> Iterator[str]:
return iter(self._values)
def __len__(self) -> int: # pragma: no cover
return len(self._values)
def __repr__(self) -> str:
return f"SimpleMapping({self._values!r})"
lines = callequal(
SimpleMapping({"a": 0, "b": 1}),
SimpleMapping({"a": 1, "b": 1, "c": 2}),
)
assert lines is not None
assert lines[2:] == [
"Omitting 1 identical items, use -vv to show",
"Differing items:",
"{'a': 0} != {'a': 1}",
"Right contains 1 more item:",
"{'c': 2}",
"Use -v to get more diff",
]
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,",
"? ^",
"+ 1,",
"? ^",
"- 4,",
"? ^",
"+ 2,",
"? ^",
"- 5,",
" )",
]
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,",
" )",
]
lines = callequal((1, 2, 3), (1, 20, 3), verbose=2)
assert lines == [
"(1, 2, 3) == (1, 20, 3)",
"",
"At index 1 diff: 2 != 20",
"",
"Full diff:",
" (",
" 1,",
"- 20,",
"? -",
"+ 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