Current File : //lib/python3/dist-packages/twisted/trial/test/test_matchers.py
"""
Tests for L{twisted.trial.test.matchers}.
"""
from hamcrest import anything, assert_that, contains_string, equal_to, not_
from hamcrest.core.core.allof import AllOf
from hamcrest.core.string_description import StringDescription
from hypothesis import given
from hypothesis.strategies import just, sampled_from, text
from twisted.python.filepath import FilePath
from twisted.trial.unittest import SynchronousTestCase
from .matchers import fileContents
class FileContentsTests(SynchronousTestCase):
"""
Tests for L{fileContents}.
"""
@given(text(), just("utf-8"))
def test_matches(self, contents: str, encoding: str) -> None:
"""
L{fileContents} matches a L{IFilePath} that refers to a file that
contains a string that is matched by the parameterized matcher.
:param contents: The text string to place in the file and match
against.
:param encoding: The text encoding to use to encode C{contents} when
writing to the file.
"""
p = FilePath(self.mktemp())
p.setContent(contents.encode(encoding))
description = StringDescription()
assert_that(
fileContents(equal_to(contents)).matches(p, description), equal_to(True)
)
assert_that(str(description), equal_to(""))
@given(
just("some text, it doesn't matter what"),
sampled_from(["ascii", "latin-1", "utf-8"]),
)
def test_mismatches(self, contents: str, encoding: str) -> None:
"""
L{fileContents} does not match an L{IFilePath} that refers to a
file that contains a string that is not matched by the parameterized
matcher.
:param contents: The text string to place in the file and match
against.
:param encoding: The text encoding to use to encode C{contents} when
writing to the file.
"""
p = FilePath(self.mktemp())
p.setContent(contents.encode(encoding))
description = StringDescription()
assert_that(
fileContents(not_(anything())).matches(p, description), equal_to(False)
)
assert_that(str(description), equal_to(f"was <{p}>"))
def test_ioerror(self) -> None:
"""
L{fileContents} reports details of any I/O error encountered while
attempting to match.
"""
p = FilePath(self.mktemp())
description = StringDescription()
assert_that(fileContents(anything()).matches(p, description), equal_to(False))
assert_that(
str(description),
# It must contain at least ...
AllOf(
# the name of the matcher.
contains_string("fileContents"),
# the name of the exception raised.
contains_string("FileNotFoundError"),
# the repr (so weird values are escaped) of the path being
# matched against.
contains_string(repr(p.path)),
),
)
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