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