136 lines
4.2 KiB
Python
136 lines
4.2 KiB
Python
import pytest
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import sys
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class TestRaises(object):
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def test_raises(self):
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source = "int('qwe')"
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excinfo = pytest.raises(ValueError, source)
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code = excinfo.traceback[-1].frame.code
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s = str(code.fullsource)
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assert s == source
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def test_raises_exec(self):
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pytest.raises(ValueError, "a,x = []")
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def test_raises_syntax_error(self):
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pytest.raises(SyntaxError, "qwe qwe qwe")
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def test_raises_function(self):
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pytest.raises(ValueError, int, 'hello')
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def test_raises_callable_no_exception(self):
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class A(object):
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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_as_contextmanager(self, testdir):
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testdir.makepyfile("""
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from __future__ import with_statement
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import py, 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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result = testdir.runpytest()
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result.stdout.fnmatch_lines([
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'*3 passed*',
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])
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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_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 {0}".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 {0}".format(repr(ValueError))
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else:
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assert False, "Expected pytest.raises.Exception"
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def test_custom_raise_message(self):
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message = "TEST_MESSAGE"
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try:
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with pytest.raises(ValueError, message=message):
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pass
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except pytest.raises.Exception as e:
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assert e.msg == message
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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(object):
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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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# 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 '{0}' not found in 'invalid literal for int\(\) with base 10: 'asdf''".format(msg)
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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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