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from textwrap import dedent from testfixtures import Comparison as C, ShouldRaise, should_raise from unittest import TestCase from ..compat import PY_37_PLUS from ..shouldraise import ShouldAssert class TestShouldAssert(object): def test_no_exception(self): try: with ShouldAssert('foo'): pass except AssertionError as e: assert str(e) == "Expected AssertionError('foo'), None raised!" def test_wrong_exception(self): try: with ShouldAssert('foo'): raise KeyError() except KeyError: pass def test_wrong_text(self): try: with ShouldAssert('foo'): assert False, 'bar' except AssertionError as e: assert str(e) == dedent("""\ --- expected +++ actual @@ -1 +1,2 @@ -foo +bar +assert False""") class TestShouldRaise(TestCase): def test_no_params(self): def to_test(): raise ValueError('wrong value supplied') should_raise(ValueError('wrong value supplied'))(to_test)() def test_no_exception(self): def to_test(): pass with ShouldAssert('ValueError() (expected) != None (raised)'): should_raise(ValueError())(to_test)() def test_wrong_exception(self): def to_test(): raise ValueError('bar') if PY_37_PLUS: expected = "ValueError('foo') (expected) != ValueError('bar') (raised)" else: expected = "ValueError('foo',) (expected) != ValueError('bar',) (raised)" with ShouldAssert(expected): should_raise(ValueError('foo'))(to_test)() def test_only_exception_class(self): def to_test(): raise ValueError('bar') should_raise(ValueError)(to_test)() def test_wrong_exception_class(self): expected_exception = ValueError('bar') def to_test(): raise expected_exception try: should_raise(KeyError)(to_test)() except ValueError as actual_exception: assert actual_exception is expected_exception else: # pragma: no cover self.fail(('Wrong exception raised')) def test_wrong_exception_type(self): expected_exception = ValueError('bar') def to_test(): raise expected_exception try: should_raise(KeyError('foo'))(to_test)() except ValueError as actual_exception: assert actual_exception is expected_exception else: # pragma: no cover self.fail(('Wrong exception raised')) def test_no_supplied_or_raised(self): # effectvely we're saying "something should be raised!" # but we want to inspect s.raised rather than making # an up-front assertion def to_test(): pass with ShouldAssert("No exception raised!"): should_raise()(to_test)() def test_args(self): def to_test(*args): raise ValueError('%s' % repr(args)) should_raise(ValueError('(1,)'))(to_test)(1) def test_kw_to_args(self): def to_test(x): raise ValueError('%s' % x) should_raise(ValueError('1'))(to_test)(x=1) def test_kw(self): def to_test(**kw): raise ValueError('%r' % kw) should_raise(ValueError("{'x': 1}"))(to_test)(x=1) def test_both(self): def to_test(*args, **kw): raise ValueError('%r %r' % (args, kw)) should_raise(ValueError("(1,) {'x': 2}"))(to_test)(1, x=2) def test_method_args(self): class X: def to_test(self, *args): self.args = args raise ValueError() x = X() should_raise(ValueError)(x.to_test)(1, 2, 3) self.assertEqual(x.args, (1, 2, 3)) def test_method_kw(self): class X: def to_test(self, **kw): self.kw = kw raise ValueError() x = X() should_raise(ValueError)(x.to_test)(x=1, y=2) self.assertEqual(x.kw, {'x': 1, 'y': 2}) def test_method_both(self): class X: def to_test(self, *args, **kw): self.args = args self.kw = kw raise ValueError() x = X() should_raise(ValueError)(x.to_test)(1, y=2) self.assertEqual(x.args, (1, )) self.assertEqual(x.kw, {'y': 2}) def test_class_class(self): class Test: def __init__(self, x): # The TypeError is raised due to the mis-matched parameters # so the pass never gets executed pass # pragma: no cover should_raise(TypeError)(Test)() def test_raised(self): with ShouldRaise() as s: raise ValueError('wrong value supplied') self.assertEqual(s.raised, C(ValueError('wrong value supplied'))) def test_catch_baseexception_1(self): with ShouldRaise(SystemExit): raise SystemExit() def test_catch_baseexception_2(self): with ShouldRaise(KeyboardInterrupt): raise KeyboardInterrupt() def test_with_exception_class_supplied(self): with ShouldRaise(ValueError): raise ValueError('foo bar') def test_with_exception_supplied(self): with ShouldRaise(ValueError('foo bar')): raise ValueError('foo bar') def test_with_exception_supplied_wrong_args(self): if PY_37_PLUS: expected = "ValueError('foo') (expected) != ValueError('bar') (raised)" else: expected = "ValueError('foo',) (expected) != ValueError('bar',) (raised)" with ShouldAssert(expected): with ShouldRaise(ValueError('foo')): raise ValueError('bar') def test_neither_supplied(self): with ShouldRaise(): raise ValueError('foo bar') def test_with_no_exception_when_expected(self): if PY_37_PLUS: expected = "ValueError('foo') (expected) != None (raised)" else: expected = "ValueError('foo',) (expected) != None (raised)" with ShouldAssert(expected): with ShouldRaise(ValueError('foo')): pass def test_with_no_exception_when_expected_by_type(self): with ShouldAssert("<class 'ValueError'> (expected) != None (raised)"): with ShouldRaise(ValueError): pass def test_with_no_exception_when_neither_expected(self): with ShouldAssert("No exception raised!"): with ShouldRaise(): pass def test_with_getting_raised_exception(self): e = ValueError('foo bar') with ShouldRaise() as s: raise e assert e is s.raised def test_import_errors_1(self): with ShouldRaise(ModuleNotFoundError("No module named 'textfixtures'")): import textfixtures.foo.bar def test_import_errors_2(self): with ShouldRaise(ImportError('X')): raise ImportError('X') def test_custom_exception(self): class FileTypeError(Exception): def __init__(self, value): self.value = value with ShouldRaise(FileTypeError('X')): raise FileTypeError('X') def test_decorator_usage(self): @should_raise(ValueError('bad')) def to_test(): raise ValueError('bad') to_test() def test_unless_false_okay(self): with ShouldRaise(unless=False): raise AttributeError() def test_unless_false_bad(self): with ShouldAssert("No exception raised!"): with ShouldRaise(unless=False): pass def test_unless_true_okay(self): with ShouldRaise(unless=True): pass def test_unless_true_not_okay(self): expected_exception = AttributeError('foo') try: with ShouldRaise(unless=True): raise expected_exception except AttributeError as actual_exception: assert actual_exception is expected_exception else: # pragma: no cover self.fail(('Wrong exception raised')) def test_unless_decorator_usage(self): @should_raise(unless=True) def to_test(): pass to_test() def test_identical_reprs(self): class AnnoyingException(Exception): def __init__(self, **kw): self.other = kw.get('other') with ShouldAssert( "AnnoyingException not as expected:\n\n" 'attributes same:\n' "['args']\n\n" "attributes differ:\n" "'other': 'bar' (expected) != 'baz' (raised)\n\n" "While comparing .other: 'bar' (expected) != 'baz' (raised)" ): with ShouldRaise(AnnoyingException(other='bar')): raise AnnoyingException(other='baz') def test_identical_reprs_but_args_different(self): class MessageError(Exception): def __init__(self, message, type=None): self.message = message self.type = type def __repr__(self): return 'MessageError({!r}, {!r})'.format(self.message, self.type) with ShouldAssert( "MessageError not as expected:\n\n" 'attributes same:\n' "['message', 'type']\n\n" "attributes differ:\n" "'args': ('foo',) (expected) != ('foo', None) (raised)\n\n" "While comparing .args: sequence not as expected:\n\n" "same:\n" "('foo',)\n\n" "expected:\n" "()\n\n" "raised:\n" "(None,)" ): with ShouldRaise(MessageError('foo')): raise MessageError('foo', None)