a98e3cefc5
Hook up the PEP 302 import hook very early in pytest startup so that it gets installed before setuptools-installed plugins are imported. Also iterate over all installed plugins and mark them for rewriting. If an installed plugin is already imported then a warning is issued, we can not break since that might break existing plugins and the fallback will still be gracefull to plain asserts. Some existing tests are failing in this commit because of the new warning triggered by inline pytest runs due to the hypothesis plugin already being imported. The tests will be fixed in the next commit.
766 lines
23 KiB
Python
766 lines
23 KiB
Python
# -*- coding: utf-8 -*-
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import sys
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import textwrap
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import _pytest.assertion as plugin
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import _pytest._code
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import py
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import pytest
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from _pytest.assertion import reinterpret
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from _pytest.assertion import util
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PY3 = sys.version_info >= (3, 0)
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@pytest.fixture
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def mock_config():
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class Config(object):
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verbose = False
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def getoption(self, name):
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if name == 'verbose':
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return self.verbose
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raise KeyError('Not mocked out: %s' % name)
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return Config()
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def interpret(expr):
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return reinterpret.reinterpret(expr, _pytest._code.Frame(sys._getframe(1)))
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class TestImportHookInstallation:
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@pytest.mark.parametrize('initial_conftest', [True, False])
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@pytest.mark.parametrize('mode', ['plain', 'rewrite', 'reinterp'])
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def test_conftest_assertion_rewrite(self, testdir, initial_conftest, mode):
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"""Test that conftest files are using assertion rewrite on import.
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(#1619)
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"""
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testdir.tmpdir.join('foo/tests').ensure(dir=1)
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conftest_path = 'conftest.py' if initial_conftest else 'foo/conftest.py'
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contents = {
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conftest_path: """
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import pytest
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@pytest.fixture
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def check_first():
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def check(values, value):
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assert values.pop(0) == value
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return check
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""",
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'foo/tests/test_foo.py': """
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def test(check_first):
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check_first([10, 30], 30)
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"""
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}
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testdir.makepyfile(**contents)
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result = testdir.runpytest_subprocess('--assert=%s' % mode)
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if mode == 'plain':
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expected = 'E AssertionError'
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elif mode == 'rewrite':
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expected = '*assert 10 == 30*'
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elif mode == 'reinterp':
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expected = '*AssertionError:*was re-run*'
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else:
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assert 0
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result.stdout.fnmatch_lines([expected])
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@pytest.mark.parametrize('mode', ['plain', 'rewrite', 'reinterp'])
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def test_installed_plugin_rewrite(self, testdir, mode):
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# Make sure the hook is installed early enough so that plugins
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# installed via setuptools are re-written.
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ham = testdir.tmpdir.join('hampkg').ensure(dir=1)
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ham.join('__init__.py').write("""
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import pytest
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@pytest.fixture
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def check_first2():
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def check(values, value):
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assert values.pop(0) == value
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return check
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""")
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testdir.makepyfile(
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spamplugin="""
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import pytest
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from hampkg import check_first2
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@pytest.fixture
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def check_first():
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def check(values, value):
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assert values.pop(0) == value
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return check
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""",
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mainwrapper="""
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import pytest, pkg_resources
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class DummyDistInfo:
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project_name = 'spam'
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version = '1.0'
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def _get_metadata(self, name):
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return ['spamplugin.py,sha256=abc,123',
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'hampkg/__init__.py,sha256=abc,123']
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class DummyEntryPoint:
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name = 'spam'
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module_name = 'spam.py'
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attrs = ()
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extras = None
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dist = DummyDistInfo()
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def load(self, require=True, *args, **kwargs):
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import spamplugin
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return spamplugin
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def iter_entry_points(name):
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yield DummyEntryPoint()
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pkg_resources.iter_entry_points = iter_entry_points
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pytest.main()
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""",
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test_foo="""
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def test(check_first):
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check_first([10, 30], 30)
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def test2(check_first2):
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check_first([10, 30], 30)
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""",
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)
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result = testdir.run(sys.executable, 'mainwrapper.py', '-s', '--assert=%s' % mode)
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if mode == 'plain':
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expected = 'E AssertionError'
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elif mode == 'rewrite':
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expected = '*assert 10 == 30*'
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elif mode == 'reinterp':
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expected = '*AssertionError:*was re-run*'
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else:
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assert 0
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result.stdout.fnmatch_lines([expected])
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class TestBinReprIntegration:
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def test_pytest_assertrepr_compare_called(self, testdir):
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testdir.makeconftest("""
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import pytest
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l = []
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def pytest_assertrepr_compare(op, left, right):
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l.append((op, left, right))
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@pytest.fixture
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def list(request):
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return l
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""")
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testdir.makepyfile("""
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def test_hello():
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assert 0 == 1
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def test_check(list):
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assert list == [("==", 0, 1)]
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""")
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result = testdir.runpytest("-v")
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result.stdout.fnmatch_lines([
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"*test_hello*FAIL*",
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"*test_check*PASS*",
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])
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def callequal(left, right, verbose=False):
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config = mock_config()
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config.verbose = verbose
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return plugin.pytest_assertrepr_compare(config, '==', left, right)
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class TestAssert_reprcompare:
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def test_different_types(self):
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assert callequal([0, 1], 'foo') is None
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def test_summary(self):
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summary = callequal([0, 1], [0, 2])[0]
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assert len(summary) < 65
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def test_text_diff(self):
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diff = callequal('spam', 'eggs')[1:]
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assert '- spam' in diff
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assert '+ eggs' in diff
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def test_text_skipping(self):
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lines = callequal('a'*50 + 'spam', 'a'*50 + 'eggs')
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assert 'Skipping' in lines[1]
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for line in lines:
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assert 'a'*50 not in line
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def test_text_skipping_verbose(self):
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lines = callequal('a'*50 + 'spam', 'a'*50 + 'eggs', verbose=True)
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assert '- ' + 'a'*50 + 'spam' in lines
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assert '+ ' + 'a'*50 + 'eggs' in lines
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def test_multiline_text_diff(self):
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left = 'foo\nspam\nbar'
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right = 'foo\neggs\nbar'
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diff = callequal(left, right)
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assert '- spam' in diff
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assert '+ eggs' in diff
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def test_list(self):
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expl = callequal([0, 1], [0, 2])
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assert len(expl) > 1
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@pytest.mark.parametrize(
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['left', 'right', 'expected'], [
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([0, 1], [0, 2], """
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Full diff:
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- [0, 1]
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? ^
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+ [0, 2]
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? ^
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"""),
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({0: 1}, {0: 2}, """
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Full diff:
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- {0: 1}
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? ^
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+ {0: 2}
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? ^
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"""),
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(set([0, 1]), set([0, 2]), """
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Full diff:
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- set([0, 1])
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? ^
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+ set([0, 2])
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? ^
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""" if not PY3 else """
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Full diff:
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- {0, 1}
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? ^
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+ {0, 2}
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? ^
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""")
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]
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)
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def test_iterable_full_diff(self, left, right, expected):
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"""Test the full diff assertion failure explanation.
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When verbose is False, then just a -v notice to get the diff is rendered,
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when verbose is True, then ndiff of the pprint is returned.
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"""
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expl = callequal(left, right, verbose=False)
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assert expl[-1] == 'Use -v to get the full diff'
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expl = '\n'.join(callequal(left, right, verbose=True))
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assert expl.endswith(textwrap.dedent(expected).strip())
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def test_list_different_lenghts(self):
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expl = callequal([0, 1], [0, 1, 2])
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assert len(expl) > 1
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expl = callequal([0, 1, 2], [0, 1])
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assert len(expl) > 1
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def test_dict(self):
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expl = callequal({'a': 0}, {'a': 1})
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assert len(expl) > 1
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def test_dict_omitting(self):
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lines = callequal({'a': 0, 'b': 1}, {'a': 1, 'b': 1})
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assert lines[1].startswith('Omitting 1 identical item')
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assert 'Common items' not in lines
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for line in lines[1:]:
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assert 'b' not in line
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def test_dict_omitting_verbose(self):
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lines = callequal({'a': 0, 'b': 1}, {'a': 1, 'b': 1}, verbose=True)
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assert lines[1].startswith('Common items:')
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assert 'Omitting' not in lines[1]
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assert lines[2] == "{'b': 1}"
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def test_set(self):
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expl = callequal(set([0, 1]), set([0, 2]))
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assert len(expl) > 1
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def test_frozenzet(self):
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expl = callequal(frozenset([0, 1]), set([0, 2]))
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assert len(expl) > 1
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def test_Sequence(self):
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col = py.builtin._tryimport(
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"collections.abc",
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"collections",
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"sys")
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if not hasattr(col, "MutableSequence"):
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pytest.skip("cannot import MutableSequence")
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MutableSequence = col.MutableSequence
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class TestSequence(MutableSequence): # works with a Sequence subclass
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def __init__(self, iterable):
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self.elements = list(iterable)
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def __getitem__(self, item):
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return self.elements[item]
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def __len__(self):
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return len(self.elements)
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def __setitem__(self, item, value):
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pass
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def __delitem__(self, item):
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pass
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def insert(self, item, index):
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pass
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expl = callequal(TestSequence([0, 1]), list([0, 2]))
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assert len(expl) > 1
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def test_list_tuples(self):
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expl = callequal([], [(1,2)])
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assert len(expl) > 1
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expl = callequal([(1,2)], [])
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assert len(expl) > 1
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def test_list_bad_repr(self):
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class A:
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def __repr__(self):
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raise ValueError(42)
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expl = callequal([], [A()])
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assert 'ValueError' in "".join(expl)
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expl = callequal({}, {'1': A()})
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assert 'faulty' in "".join(expl)
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def test_one_repr_empty(self):
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"""
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the faulty empty string repr did trigger
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a unbound local error in _diff_text
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"""
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class A(str):
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def __repr__(self):
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return ''
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expl = callequal(A(), '')
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assert not expl
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def test_repr_no_exc(self):
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expl = ' '.join(callequal('foo', 'bar'))
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assert 'raised in repr()' not in expl
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def test_unicode(self):
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left = py.builtin._totext('£€', 'utf-8')
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right = py.builtin._totext('£', 'utf-8')
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expl = callequal(left, right)
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assert expl[0] == py.builtin._totext("'£€' == '£'", 'utf-8')
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assert expl[1] == py.builtin._totext('- £€', 'utf-8')
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assert expl[2] == py.builtin._totext('+ £', 'utf-8')
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def test_nonascii_text(self):
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"""
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:issue: 877
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non ascii python2 str caused a UnicodeDecodeError
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"""
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class A(str):
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def __repr__(self):
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return '\xff'
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expl = callequal(A(), '1')
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assert expl
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def test_format_nonascii_explanation(self):
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assert util.format_explanation('λ')
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def test_mojibake(self):
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# issue 429
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left = 'e'
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right = '\xc3\xa9'
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if not isinstance(left, py.builtin.bytes):
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left = py.builtin.bytes(left, 'utf-8')
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right = py.builtin.bytes(right, 'utf-8')
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expl = callequal(left, right)
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for line in expl:
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assert isinstance(line, py.builtin.text)
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msg = py.builtin._totext('\n').join(expl)
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assert msg
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class TestFormatExplanation:
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def test_special_chars_full(self, testdir):
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# Issue 453, for the bug this would raise IndexError
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testdir.makepyfile("""
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def test_foo():
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assert '\\n}' == ''
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""")
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result = testdir.runpytest()
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assert result.ret == 1
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result.stdout.fnmatch_lines([
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"*AssertionError*",
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])
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def test_fmt_simple(self):
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expl = 'assert foo'
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assert util.format_explanation(expl) == 'assert foo'
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def test_fmt_where(self):
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expl = '\n'.join(['assert 1',
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'{1 = foo',
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'} == 2'])
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res = '\n'.join(['assert 1 == 2',
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' + where 1 = foo'])
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assert util.format_explanation(expl) == res
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def test_fmt_and(self):
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expl = '\n'.join(['assert 1',
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'{1 = foo',
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'} == 2',
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'{2 = bar',
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'}'])
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res = '\n'.join(['assert 1 == 2',
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' + where 1 = foo',
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' + and 2 = bar'])
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assert util.format_explanation(expl) == res
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def test_fmt_where_nested(self):
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expl = '\n'.join(['assert 1',
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'{1 = foo',
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'{foo = bar',
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'}',
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'} == 2'])
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res = '\n'.join(['assert 1 == 2',
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' + where 1 = foo',
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' + where foo = bar'])
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assert util.format_explanation(expl) == res
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def test_fmt_newline(self):
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expl = '\n'.join(['assert "foo" == "bar"',
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'~- foo',
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'~+ bar'])
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res = '\n'.join(['assert "foo" == "bar"',
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' - foo',
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' + bar'])
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assert util.format_explanation(expl) == res
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def test_fmt_newline_escaped(self):
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expl = '\n'.join(['assert foo == bar',
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'baz'])
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res = 'assert foo == bar\\nbaz'
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assert util.format_explanation(expl) == res
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def test_fmt_newline_before_where(self):
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expl = '\n'.join(['the assertion message here',
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'>assert 1',
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'{1 = foo',
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'} == 2',
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'{2 = bar',
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'}'])
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res = '\n'.join(['the assertion message here',
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'assert 1 == 2',
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' + where 1 = foo',
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' + and 2 = bar'])
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assert util.format_explanation(expl) == res
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def test_fmt_multi_newline_before_where(self):
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expl = '\n'.join(['the assertion',
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'~message here',
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'>assert 1',
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'{1 = foo',
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'} == 2',
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'{2 = bar',
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'}'])
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res = '\n'.join(['the assertion',
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' message here',
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'assert 1 == 2',
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' + where 1 = foo',
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' + and 2 = bar'])
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assert util.format_explanation(expl) == res
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|
|
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def test_python25_compile_issue257(testdir):
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testdir.makepyfile("""
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def test_rewritten():
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assert 1 == 2
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# some comment
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""")
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result = testdir.runpytest()
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assert result.ret == 1
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result.stdout.fnmatch_lines("""
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*E*assert 1 == 2*
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*1 failed*
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""")
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|
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def test_rewritten(testdir):
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testdir.makepyfile("""
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def test_rewritten():
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assert "@py_builtins" in globals()
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""")
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assert testdir.runpytest().ret == 0
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|
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def test_reprcompare_notin(mock_config):
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detail = plugin.pytest_assertrepr_compare(
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mock_config, 'not in', 'foo', 'aaafoobbb')[1:]
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assert detail == ["'foo' is contained here:", ' aaafoobbb', '? +++']
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|
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def test_pytest_assertrepr_compare_integration(testdir):
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testdir.makepyfile("""
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def test_hello():
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x = set(range(100))
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y = x.copy()
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y.remove(50)
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assert x == y
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""")
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result = testdir.runpytest()
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result.stdout.fnmatch_lines([
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"*def test_hello():*",
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"*assert x == y*",
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"*E*Extra items*left*",
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"*E*50*",
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])
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|
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def test_sequence_comparison_uses_repr(testdir):
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testdir.makepyfile("""
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def test_hello():
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x = set("hello x")
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y = set("hello y")
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assert x == y
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""")
|
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result = testdir.runpytest()
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result.stdout.fnmatch_lines([
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"*def test_hello():*",
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"*assert x == y*",
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"*E*Extra items*left*",
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"*E*'x'*",
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"*E*Extra items*right*",
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"*E*'y'*",
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])
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|
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|
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def test_assert_compare_truncate_longmessage(monkeypatch, testdir):
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testdir.makepyfile(r"""
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def test_long():
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a = list(range(200))
|
|
b = a[::2]
|
|
a = '\n'.join(map(str, a))
|
|
b = '\n'.join(map(str, b))
|
|
assert a == b
|
|
""")
|
|
monkeypatch.delenv('CI', raising=False)
|
|
|
|
result = testdir.runpytest()
|
|
# without -vv, truncate the message showing a few diff lines only
|
|
result.stdout.fnmatch_lines([
|
|
"*- 1",
|
|
"*- 3",
|
|
"*- 5",
|
|
"*- 7",
|
|
"*truncated (193 more lines)*use*-vv*",
|
|
])
|
|
|
|
|
|
result = testdir.runpytest('-vv')
|
|
result.stdout.fnmatch_lines([
|
|
"*- 197",
|
|
])
|
|
|
|
monkeypatch.setenv('CI', '1')
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines([
|
|
"*- 197",
|
|
])
|
|
|
|
|
|
def test_assertrepr_loaded_per_dir(testdir):
|
|
testdir.makepyfile(test_base=['def test_base(): assert 1 == 2'])
|
|
a = testdir.mkdir('a')
|
|
a_test = a.join('test_a.py')
|
|
a_test.write('def test_a(): assert 1 == 2')
|
|
a_conftest = a.join('conftest.py')
|
|
a_conftest.write('def pytest_assertrepr_compare(): return ["summary a"]')
|
|
b = testdir.mkdir('b')
|
|
b_test = b.join('test_b.py')
|
|
b_test.write('def test_b(): assert 1 == 2')
|
|
b_conftest = b.join('conftest.py')
|
|
b_conftest.write('def pytest_assertrepr_compare(): return ["summary b"]')
|
|
result = testdir.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(testdir):
|
|
testdir.makepyfile("""
|
|
def test_hello():
|
|
x = 3
|
|
assert x == 4
|
|
""")
|
|
result = testdir.runpytest()
|
|
assert "3 == 4" in result.stdout.str()
|
|
result = testdir.runpytest_subprocess("--assert=plain")
|
|
assert "3 == 4" not in result.stdout.str()
|
|
|
|
def test_old_assert_mode(testdir):
|
|
testdir.makepyfile("""
|
|
def test_in_old_mode():
|
|
assert "@py_builtins" not in globals()
|
|
""")
|
|
result = testdir.runpytest_subprocess("--assert=reinterp")
|
|
assert result.ret == 0
|
|
|
|
def test_triple_quoted_string_issue113(testdir):
|
|
testdir.makepyfile("""
|
|
def test_hello():
|
|
assert "" == '''
|
|
'''""")
|
|
result = testdir.runpytest("--fulltrace")
|
|
result.stdout.fnmatch_lines([
|
|
"*1 failed*",
|
|
])
|
|
assert 'SyntaxError' not in result.stdout.str()
|
|
|
|
def test_traceback_failure(testdir):
|
|
p1 = testdir.makepyfile("""
|
|
def g():
|
|
return 2
|
|
def f(x):
|
|
assert x == g()
|
|
def test_onefails():
|
|
f(3)
|
|
""")
|
|
result = testdir.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 = testdir.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"
|
|
])
|
|
|
|
@pytest.mark.skipif("'__pypy__' in sys.builtin_module_names or sys.platform.startswith('java')" )
|
|
def test_warn_missing(testdir):
|
|
testdir.makepyfile("")
|
|
result = testdir.run(sys.executable, "-OO", "-m", "pytest", "-h")
|
|
result.stderr.fnmatch_lines([
|
|
"*WARNING*assert statements are not executed*",
|
|
])
|
|
result = testdir.run(sys.executable, "-OO", "-m", "pytest")
|
|
result.stderr.fnmatch_lines([
|
|
"*WARNING*assert statements are not executed*",
|
|
])
|
|
|
|
def test_recursion_source_decode(testdir):
|
|
testdir.makepyfile("""
|
|
def test_something():
|
|
pass
|
|
""")
|
|
testdir.makeini("""
|
|
[pytest]
|
|
python_files = *.py
|
|
""")
|
|
result = testdir.runpytest("--collect-only")
|
|
result.stdout.fnmatch_lines("""
|
|
<Module*>
|
|
""")
|
|
|
|
def test_AssertionError_message(testdir):
|
|
testdir.makepyfile("""
|
|
def test_hello():
|
|
x,y = 1,2
|
|
assert 0, (x,y)
|
|
""")
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines("""
|
|
*def test_hello*
|
|
*assert 0, (x,y)*
|
|
*AssertionError: (1, 2)*
|
|
""")
|
|
|
|
@pytest.mark.skipif(PY3, reason='This bug does not exist on PY3')
|
|
def test_set_with_unsortable_elements():
|
|
# issue #718
|
|
class UnsortableKey(object):
|
|
def __init__(self, name):
|
|
self.name = name
|
|
|
|
def __lt__(self, other):
|
|
raise RuntimeError()
|
|
|
|
def __repr__(self):
|
|
return 'repr({0})'.format(self.name)
|
|
|
|
def __eq__(self, other):
|
|
return self.name == other.name
|
|
|
|
def __hash__(self):
|
|
return hash(self.name)
|
|
|
|
left_set = set(UnsortableKey(str(i)) for i in range(1, 3))
|
|
right_set = set(UnsortableKey(str(i)) for i in range(2, 4))
|
|
expl = callequal(left_set, right_set, verbose=True)
|
|
# skip first line because it contains the "construction" of the set, which does not have a guaranteed order
|
|
expl = expl[1:]
|
|
dedent = textwrap.dedent("""
|
|
Extra items in the left set:
|
|
repr(1)
|
|
Extra items in the right set:
|
|
repr(3)
|
|
Full diff (fallback to calling repr on each item):
|
|
- repr(1)
|
|
repr(2)
|
|
+ repr(3)
|
|
""").strip()
|
|
assert '\n'.join(expl) == dedent
|
|
|
|
def test_diff_newline_at_end(monkeypatch, testdir):
|
|
testdir.makepyfile(r"""
|
|
def test_diff():
|
|
assert 'asdf' == 'asdf\n'
|
|
""")
|
|
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines(r"""
|
|
*assert 'asdf' == 'asdf\n'
|
|
* - asdf
|
|
* + asdf
|
|
* ? +
|
|
""")
|
|
|
|
def test_assert_tuple_warning(testdir):
|
|
testdir.makepyfile("""
|
|
def test_tuple():
|
|
assert(False, 'you shall not pass')
|
|
""")
|
|
result = testdir.runpytest('-rw')
|
|
result.stdout.fnmatch_lines('WR1*:2 assertion is always true*')
|
|
|
|
def test_assert_indirect_tuple_no_warning(testdir):
|
|
testdir.makepyfile("""
|
|
def test_tuple():
|
|
tpl = ('foo', 'bar')
|
|
assert tpl
|
|
""")
|
|
result = testdir.runpytest('-rw')
|
|
output = '\n'.join(result.stdout.lines)
|
|
assert 'WR1' not in output
|