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import errno
from traceback import format_exception_only
import av
from .common import is_windows
def test_stringify() -> None:
for cls in (av.ValueError, av.FileNotFoundError, av.DecoderNotFoundError):
e = cls(1, "foo")
assert f"{e}" == "[Errno 1] foo"
assert f"{e!r}" == f"{cls.__name__}(1, 'foo')"
assert (
format_exception_only(cls, e)[-1]
== f"av.error.{cls.__name__}: [Errno 1] foo\n"
)
for cls in (av.ValueError, av.FileNotFoundError, av.DecoderNotFoundError):
e = cls(1, "foo", "bar.txt")
assert f"{e}" == "[Errno 1] foo: 'bar.txt'"
assert f"{e!r}" == f"{cls.__name__}(1, 'foo', 'bar.txt')"
assert (
format_exception_only(cls, e)[-1]
== f"av.error.{cls.__name__}: [Errno 1] foo: 'bar.txt'\n"
)
def test_bases() -> None:
assert issubclass(av.ValueError, ValueError)
assert issubclass(av.ValueError, av.FFmpegError)
assert issubclass(av.FileNotFoundError, FileNotFoundError)
assert issubclass(av.FileNotFoundError, OSError)
assert issubclass(av.FileNotFoundError, av.FFmpegError)
def test_filenotfound():
"""Catch using builtin class on Python 3.3"""
try:
av.open("does not exist")
except FileNotFoundError as e:
assert e.errno == errno.ENOENT
if is_windows:
assert e.strerror in (
"Error number -2 occurred",
"No such file or directory",
)
else:
assert e.strerror == "No such file or directory"
assert e.filename == "does not exist"
else:
assert False, "No exception raised!"
def test_buffertoosmall() -> None:
"""Throw an exception from an enum."""
BUFFER_TOO_SMALL = 1397118274
try:
av.error.err_check(-BUFFER_TOO_SMALL)
except av.error.BufferTooSmallError as e:
assert e.errno == BUFFER_TOO_SMALL
else:
assert False, "No exception raised!"
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