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import sys
import pytest
import asyncio
from hamcrest import has_properties
from hamcrest.core.core.future import resolved, future_raising
from hamcrest_unit_test.matcher_test import MatcherTest
if __name__ == "__main__":
sys.path.insert(0, "..")
sys.path.insert(0, "../..")
__author__ = "David Keijser"
__copyright__ = "Copyright 2023 hamcrest.org"
__license__ = "BSD, see License.txt"
async def no_exception(*args, **kwargs):
return
async def raise_exception(*args, **kwargs):
raise AssertionError(str(args) + str(kwargs))
async def raise_exception_with_properties(**kwargs):
err = AssertionError("boom")
for k, v in kwargs.items():
setattr(err, k, v)
raise err
# From python 3.8 this could be simplified by using unittest.IsolatedAsyncioTestCase
class FutureExceptionTest(MatcherTest):
def testMatchesIfFutureHasTheExactExceptionExpected(self):
async def test():
self.assert_matches(
"Right exception",
future_raising(AssertionError),
await resolved(raise_exception()),
)
asyncio.new_event_loop().run_until_complete(test())
def testDoesNotMatchIfActualIsNotAFuture(self):
async def test():
self.assert_does_not_match("Not a future", future_raising(TypeError), 23)
asyncio.new_event_loop().run_until_complete(test())
def testDoesNotMatchIfFutureIsNotDone(self):
future = asyncio.Future(loop=asyncio.new_event_loop())
self.assert_does_not_match("Unresolved future", future_raising(TypeError), future)
def testDoesNotMatchIfFutureIsCancelled(self):
future = asyncio.Future(loop=asyncio.new_event_loop())
future.cancel()
self.assert_does_not_match("Cancelled future", future_raising(TypeError), future)
@pytest.mark.skipif(
not (3, 0) <= sys.version_info < (3, 7), reason="Message differs between Python versions"
)
def testDoesNotMatchIfFutureHasTheWrongExceptionTypePy3(self):
return
async def test():
self.assert_does_not_match(
"Wrong exception", future_raising(IOError), await resolved(raise_exception())
)
expected_message = (
"AssertionError('(){}',) of type <class 'AssertionError'> was raised instead"
)
self.assert_mismatch_description(
expected_message, future_raising(TypeError), await resolved(raise_exception())
)
asyncio.get_event_loop().run_until_complete(test())
@pytest.mark.skipif(sys.version_info < (3, 7), reason="Message differs between Python versions")
def testDoesNotMatchIfFutureHasTheWrongExceptionTypePy37(self):
async def test():
self.assert_does_not_match(
"Wrong exception", future_raising(IOError), await resolved(raise_exception())
)
expected_message = (
"AssertionError('(){}') of type <class 'AssertionError'> was raised instead"
)
self.assert_mismatch_description(
expected_message, future_raising(TypeError), await resolved(raise_exception())
)
asyncio.new_event_loop().run_until_complete(test())
def testMatchesIfFutureHasASubclassOfTheExpectedException(self):
async def test():
self.assert_matches(
"Subclassed Exception",
future_raising(Exception),
await resolved(raise_exception()),
)
asyncio.new_event_loop().run_until_complete(test())
def testDoesNotMatchIfFutureDoesNotHaveException(self):
async def test():
self.assert_does_not_match(
"No exception", future_raising(ValueError), await resolved(no_exception())
)
asyncio.new_event_loop().run_until_complete(test())
def testDoesNotMatchExceptionIfRegularExpressionDoesNotMatch(self):
async def test():
self.assert_does_not_match(
"Bad regex",
future_raising(AssertionError, "Phrase not found"),
await resolved(raise_exception()),
)
self.assert_mismatch_description(
'''Correct assertion type raised, but the expected pattern ("Phrase not found") not found. Exception message was: "(){}"''',
future_raising(AssertionError, "Phrase not found"),
await resolved(raise_exception()),
)
asyncio.new_event_loop().run_until_complete(test())
def testMatchesRegularExpressionToStringifiedException(self):
async def test():
self.assert_matches(
"Regex",
future_raising(AssertionError, "(3, 1, 4)"),
await resolved(raise_exception(3, 1, 4)),
)
self.assert_matches(
"Regex",
future_raising(AssertionError, r"([\d, ]+)"),
await resolved(raise_exception(3, 1, 4)),
)
asyncio.new_event_loop().run_until_complete(test())
def testMachesIfExceptionMatchesAdditionalMatchers(self):
async def test():
self.assert_matches(
"Properties",
future_raising(AssertionError, matching=has_properties(prip="prop")),
await resolved(raise_exception_with_properties(prip="prop")),
)
asyncio.new_event_loop().run_until_complete(test())
def testDoesNotMatchIfAdditionalMatchersDoesNotMatch(self):
async def test():
self.assert_does_not_match(
"Bad properties",
future_raising(AssertionError, matching=has_properties(prop="prip")),
await resolved(raise_exception_with_properties(prip="prop")),
)
self.assert_mismatch_description(
'''Correct assertion type raised, but an object with a property 'prop' matching 'prip' not found. Exception message was: "boom"''',
future_raising(AssertionError, matching=has_properties(prop="prip")),
await resolved(raise_exception_with_properties(prip="prop")),
)
asyncio.new_event_loop().run_until_complete(test())
def testDoesNotMatchIfNeitherPatternOrMatcherMatch(self):
async def test():
self.assert_does_not_match(
"Bad pattern and properties",
future_raising(
AssertionError, pattern="asdf", matching=has_properties(prop="prip")
),
await resolved(raise_exception_with_properties(prip="prop")),
)
self.assert_mismatch_description(
'''Correct assertion type raised, but the expected pattern ("asdf") and an object with a property 'prop' matching 'prip' not found. Exception message was: "boom"''',
future_raising(
AssertionError, pattern="asdf", matching=has_properties(prop="prip")
),
await resolved(raise_exception_with_properties(prip="prop")),
)
asyncio.new_event_loop().run_until_complete(test())
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