def test_file(self):
"""
Check that File.copy yields the proper content in the destination file
in all situations that trigger different code paths:
- different content
- different content of the same size
- same content
- long content
"""
src = self.tmppath("src")
dest = self.tmppath("dest")
for content in samples:
with open(src, "wb") as tmp:
tmp.write(content)
# Ensure the destination file, when it exists, is older than the
# source
if os.path.exists(dest):
time = os.path.getmtime(src) - 1
os.utime(dest, (time, time))
f = File(src)
f.copy(dest)
self.assertEqual(content, open(dest, "rb").read())
self.assertEqual(content, f.open().read())
self.assertEqual(content, f.open().read())
def test_file(self):
'''
Check that File.copy yields the proper content in the destination file
in all situations that trigger different code paths:
- different content
- different content of the same size
- same content
- long content
'''
src = self.tmppath('src')
dest = self.tmppath('dest')
for content in samples:
with open(src, 'wb') as tmp:
tmp.write(content)
# Ensure the destination file, when it exists, is older than the
# source
if os.path.exists(dest):
time = os.path.getmtime(src) - 1
os.utime(dest, (time, time))
f = File(src)
f.copy(dest)
self.assertEqual(content, open(dest, 'rb').read())
self.assertEqual(content, f.open().read())
self.assertEqual(content, f.open().read())
def test_file_dest(self):
"""
Similar to test_file, but for a destination object instead of
a destination file. This ensures the destination object is being
used properly by File.copy, ensuring that other subclasses of Dest
will work.
"""
src = self.tmppath("src")
dest = MockDest()
for content in samples:
with open(src, "wb") as tmp:
tmp.write(content)
f = File(src)
f.copy(dest)
self.assertEqual(content, dest.getvalue())
def test_file_dest(self):
'''
Similar to test_file, but for a destination object instead of
a destination file. This ensures the destination object is being
used properly by File.copy, ensuring that other subclasses of Dest
will work.
'''
src = self.tmppath('src')
dest = MockDest()
for content in samples:
with open(src, 'wb') as tmp:
tmp.write(content)
f = File(src)
f.copy(dest)
self.assertEqual(content, dest.getvalue())
def test_file_no_write(self):
"""
Test various conditions where File.copy is expected not to write
in the destination file.
"""
src = self.tmppath("src")
dest = self.tmppath("dest")
with open(src, "wb") as tmp:
tmp.write(b"test")
# Initial copy
f = File(src)
f.copy(dest)
# Ensure subsequent copies won't trigger writes
f.copy(DestNoWrite(dest))
self.assertEqual(b"test", open(dest, "rb").read())
# When the source file is newer, but with the same content, no copy
# should occur
time = os.path.getmtime(src) - 1
os.utime(dest, (time, time))
f.copy(DestNoWrite(dest))
self.assertEqual(b"test", open(dest, "rb").read())
# When the source file is older than the destination file, even with
# different content, no copy should occur.
with open(src, "wb") as tmp:
tmp.write(b"fooo")
time = os.path.getmtime(dest) - 1
os.utime(src, (time, time))
f.copy(DestNoWrite(dest))
self.assertEqual(b"test", open(dest, "rb").read())
# Double check that under conditions where a copy occurs, we would get
# an exception.
time = os.path.getmtime(src) - 1
os.utime(dest, (time, time))
self.assertRaises(RuntimeError, f.copy, DestNoWrite(dest))
# skip_if_older=False is expected to force a copy in this situation.
f.copy(dest, skip_if_older=False)
self.assertEqual(b"fooo", open(dest, "rb").read())
def test_file_no_write(self):
'''
Test various conditions where File.copy is expected not to write
in the destination file.
'''
src = self.tmppath('src')
dest = self.tmppath('dest')
with open(src, 'wb') as tmp:
tmp.write('test')
# Initial copy
f = File(src)
f.copy(dest)
# Ensure subsequent copies won't trigger writes
f.copy(DestNoWrite(dest))
self.assertEqual('test', open(dest, 'rb').read())
# When the source file is newer, but with the same content, no copy
# should occur
time = os.path.getmtime(src) - 1
os.utime(dest, (time, time))
f.copy(DestNoWrite(dest))
self.assertEqual('test', open(dest, 'rb').read())
# When the source file is older than the destination file, even with
# different content, no copy should occur.
with open(src, 'wb') as tmp:
tmp.write('fooo')
time = os.path.getmtime(dest) - 1
os.utime(src, (time, time))
f.copy(DestNoWrite(dest))
self.assertEqual('test', open(dest, 'rb').read())
# Double check that under conditions where a copy occurs, we would get
# an exception.
time = os.path.getmtime(src) - 1
os.utime(dest, (time, time))
self.assertRaises(RuntimeError, f.copy, DestNoWrite(dest))
# skip_if_older=False is expected to force a copy in this situation.
f.copy(dest, skip_if_older=False)
self.assertEqual('fooo', open(dest, 'rb').read())
