class TestCOWFS(FSTestCases, unittest.TestCase):
def make_fs(self) -> COWFS:
self.tempfs = TempFS()
return COWFS(self.tempfs)
def test_makedir_bug(self) -> None:
# These two commands disclosed a bug in COWFS.makedir(). This
# serves as a regression test.
self.tempfs.makedir("/b$")
self.fs.makedir("/b$/c$")
self.fs.invariant()
def test_openbin_bug(self) -> None:
# These two commands disclosed a bug in COWFS.openbin(). This
# serves as a regression test.
self.tempfs.makedir("/b$")
self.fs.writetext("/b$/c.txt", "Buggy?")
self.fs.invariant()
def test_listdir_bug(self) -> None:
# Removing a file disclosed a bug in COWFS.listdir(). This
# serves as a regression test.
self.tempfs.makedirs("/b/d")
self.tempfs.writetext("/b/d/c1.txt", "hmmm")
self.tempfs.writetext("/b/d/c2.txt", "hmmm")
self.tempfs.writetext("/b/d/c3.txt", "hmmm")
self.fs.remove("/b/d/c1.txt")
self.assertEqual({"c2.txt", "c3.txt"}, set(self.fs.listdir("/b/d")))
def test_listdir(self) -> None:
fs = MemoryFS()
fs.makedirs("/b$")
fs.makedirs("/b$/dir1")
fs.makedirs("/b$/dir2")
fs.writetext("/b$/file1.txt", "file1")
fs.writetext("/b$/file2.txt", "file2")
fs.writetext("/b$/dir1/file1.txt", "file1")
fs.writetext("/b$/dir1/file2.txt", "file2")
fs.writetext("/b$/dir2/file1.txt", "file1")
fs.writetext("/b$/dir2/file2.txt", "file2")
c = COWFS(fs)
path = "/b$/dir1/file2.txt"
c.writetext(path, "xxxx")
# Now the COW version is different. But it should still have
# the old unchanged files.
self.assertTrue(c.exists("/b$/dir1/file1.txt")) # Yes, but...
self.assertEqual({"dir1", "dir2", "file1.txt", "file2.txt"},
set(c.listdir("/b$")))
def test_getsyspath(self) -> None:
dirpath = "/b$/dir1"
self.tempfs.makedirs(dirpath)
filepath = fs.path.join(dirpath, "foo.txt")
self.tempfs.writetext(filepath, "original contents")
# syspath for a filepath is the same as the syspath in the
# basefs.
self.assertEqual(self.fs.base_fs.getsyspath(filepath),
self.fs.getsyspath(filepath))
# After writing to it, the syspath is now the same as the
# syspath in the additions_fs.
self.fs.writetext(filepath, "replacement contents")
self.assertEqual(self.fs.additions_fs.getsyspath(filepath),
self.fs.getsyspath(filepath))
# root raises an exception
with self.assertRaises(fs.errors.NoSysPath):
self.fs.getsyspath("/")
