def test_next(self, mmap_file):
with open(mmap_file) as target:
wrapper = icom._MMapWrapper(target)
lines = target.readlines()
for line in lines:
next_line = next(wrapper)
assert next_line.strip() == line.strip()
with pytest.raises(StopIteration, match=r"^$"):
next(wrapper)
def test_get_attr(self, mmap_file):
with open(mmap_file) as target:
wrapper = icom._MMapWrapper(target)
attrs = dir(wrapper.mmap)
attrs = [attr for attr in attrs if not attr.startswith("__")]
attrs.append("__next__")
for attr in attrs:
assert hasattr(wrapper, attr)
assert not hasattr(wrapper, "foo")
def test_constructor_bad_file(self, mmap_file):
non_file = StringIO("I am not a file")
non_file.fileno = lambda: -1
# the error raised is different on Windows
if is_platform_windows():
msg = "The parameter is incorrect"
err = OSError
else:
msg = "[Errno 22]"
err = mmap.error
with pytest.raises(err, match=msg):
icom._MMapWrapper(non_file)
target = open(mmap_file)
target.close()
msg = "I/O operation on closed file"
with pytest.raises(ValueError, match=msg):
icom._MMapWrapper(target)
