866904ab80
This reverts commit dfe54cd82f.
The idea in the commit was to simplify the code by removing the check
and instead letting it TypeError which has the same effect.
However this type error is caught by mypy, and rather than ignoring the
error we think it's better and clearer to go back to the previous
explicit check.
257 lines
8.3 KiB
Python
257 lines
8.3 KiB
Python
import sys
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import pytest
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from _pytest.outcomes import Failed
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class TestRaises:
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def test_check_callable(self):
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with pytest.raises(TypeError, match=r".* must be callable"):
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pytest.raises(RuntimeError, "int('qwe')")
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def test_raises(self):
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excinfo = pytest.raises(ValueError, int, "qwe")
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assert "invalid literal" in str(excinfo.value)
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def test_raises_function(self):
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excinfo = pytest.raises(ValueError, int, "hello")
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assert "invalid literal" in str(excinfo.value)
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def test_raises_callable_no_exception(self):
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class A:
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def __call__(self):
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pass
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try:
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pytest.raises(ValueError, A())
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except pytest.raises.Exception:
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pass
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def test_raises_falsey_type_error(self):
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with pytest.raises(TypeError):
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with pytest.raises(AssertionError, match=0):
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raise AssertionError("ohai")
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def test_raises_repr_inflight(self):
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"""Ensure repr() on an exception info inside a pytest.raises with block works (#4386)"""
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class E(Exception):
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pass
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with pytest.raises(E) as excinfo:
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# this test prints the inflight uninitialized object
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# using repr and str as well as pprint to demonstrate
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# it works
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print(str(excinfo))
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print(repr(excinfo))
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import pprint
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pprint.pprint(excinfo)
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raise E()
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def test_raises_as_contextmanager(self, testdir):
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testdir.makepyfile(
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"""
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import pytest
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import _pytest._code
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def test_simple():
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with pytest.raises(ZeroDivisionError) as excinfo:
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assert isinstance(excinfo, _pytest._code.ExceptionInfo)
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1/0
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print(excinfo)
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assert excinfo.type == ZeroDivisionError
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assert isinstance(excinfo.value, ZeroDivisionError)
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def test_noraise():
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with pytest.raises(pytest.raises.Exception):
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with pytest.raises(ValueError):
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int()
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def test_raise_wrong_exception_passes_by():
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with pytest.raises(ZeroDivisionError):
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with pytest.raises(ValueError):
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1/0
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"""
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)
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(["*3 passed*"])
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def test_does_not_raise(self, testdir):
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testdir.makepyfile(
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"""
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from contextlib import contextmanager
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import pytest
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@contextmanager
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def does_not_raise():
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yield
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@pytest.mark.parametrize('example_input,expectation', [
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(3, does_not_raise()),
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(2, does_not_raise()),
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(1, does_not_raise()),
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(0, pytest.raises(ZeroDivisionError)),
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])
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def test_division(example_input, expectation):
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'''Test how much I know division.'''
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with expectation:
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assert (6 / example_input) is not None
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"""
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)
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(["*4 passed*"])
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def test_does_not_raise_does_raise(self, testdir):
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testdir.makepyfile(
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"""
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from contextlib import contextmanager
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import pytest
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@contextmanager
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def does_not_raise():
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yield
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@pytest.mark.parametrize('example_input,expectation', [
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(0, does_not_raise()),
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(1, pytest.raises(ZeroDivisionError)),
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])
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def test_division(example_input, expectation):
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'''Test how much I know division.'''
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with expectation:
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assert (6 / example_input) is not None
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"""
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)
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(["*2 failed*"])
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def test_noclass(self):
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with pytest.raises(TypeError):
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pytest.raises("wrong", lambda: None)
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def test_invalid_arguments_to_raises(self):
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with pytest.raises(TypeError, match="unknown"):
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with pytest.raises(TypeError, unknown="bogus"):
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raise ValueError()
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def test_tuple(self):
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with pytest.raises((KeyError, ValueError)):
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raise KeyError("oops")
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def test_no_raise_message(self):
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try:
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pytest.raises(ValueError, int, "0")
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except pytest.raises.Exception as e:
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assert e.msg == "DID NOT RAISE {}".format(repr(ValueError))
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else:
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assert False, "Expected pytest.raises.Exception"
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try:
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with pytest.raises(ValueError):
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pass
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except pytest.raises.Exception as e:
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assert e.msg == "DID NOT RAISE {}".format(repr(ValueError))
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else:
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assert False, "Expected pytest.raises.Exception"
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@pytest.mark.parametrize("method", ["function", "with"])
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def test_raises_cyclic_reference(self, method):
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"""
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Ensure pytest.raises does not leave a reference cycle (#1965).
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"""
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import gc
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class T:
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def __call__(self):
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raise ValueError
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t = T()
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if method == "function":
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pytest.raises(ValueError, t)
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else:
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with pytest.raises(ValueError):
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t()
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# ensure both forms of pytest.raises don't leave exceptions in sys.exc_info()
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assert sys.exc_info() == (None, None, None)
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del t
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# Make sure this does get updated in locals dict
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# otherwise it could keep a reference
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locals()
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# ensure the t instance is not stuck in a cyclic reference
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for o in gc.get_objects():
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assert type(o) is not T
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def test_raises_match(self):
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msg = r"with base \d+"
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with pytest.raises(ValueError, match=msg):
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int("asdf")
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msg = "with base 10"
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with pytest.raises(ValueError, match=msg):
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int("asdf")
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msg = "with base 16"
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expr = r"Pattern '{}' not found in \"invalid literal for int\(\) with base 10: 'asdf'\"".format(
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msg
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)
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with pytest.raises(AssertionError, match=expr):
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with pytest.raises(ValueError, match=msg):
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int("asdf", base=10)
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def test_match_failure_string_quoting(self):
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with pytest.raises(AssertionError) as excinfo:
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with pytest.raises(AssertionError, match="'foo"):
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raise AssertionError("'bar")
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msg, = excinfo.value.args
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assert msg == 'Pattern "\'foo" not found in "\'bar"'
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def test_raises_match_wrong_type(self):
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"""Raising an exception with the wrong type and match= given.
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pytest should throw the unexpected exception - the pattern match is not
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really relevant if we got a different exception.
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"""
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with pytest.raises(ValueError):
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with pytest.raises(IndexError, match="nomatch"):
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int("asdf")
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def test_raises_exception_looks_iterable(self):
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class Meta(type):
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def __getitem__(self, item):
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return 1 / 0
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def __len__(self):
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return 1
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class ClassLooksIterableException(Exception, metaclass=Meta):
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pass
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with pytest.raises(
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Failed,
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match=r"DID NOT RAISE <class 'raises(\..*)*ClassLooksIterableException'>",
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):
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pytest.raises(ClassLooksIterableException, lambda: None)
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def test_raises_with_raising_dunder_class(self):
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"""Test current behavior with regard to exceptions via __class__ (#4284)."""
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class CrappyClass(Exception):
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# Type ignored because it's bypassed intentionally.
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@property # type: ignore
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def __class__(self):
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assert False, "via __class__"
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with pytest.raises(AssertionError) as excinfo:
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with pytest.raises(CrappyClass()):
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pass
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assert "via __class__" in excinfo.value.args[0]
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def test_raises_context_manager_with_kwargs(self):
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with pytest.raises(TypeError) as excinfo:
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with pytest.raises(Exception, foo="bar"):
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pass
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assert "Unexpected keyword arguments" in str(excinfo.value)
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