def test_posix_backend_open(self):
"""test opening a file from posix backend"""
filepath = '1234'
mode = 'w'
backend = PosixBackendArchive('/tmp')
my_file = backend.open(filepath, mode)
self.assertTrue(isinstance(my_file, PosixBackendArchive))
#easiest way to unit test is look at class variable
# pylint: disable=protected-access
self.assertTrue(isinstance(backend._file, ExtendedFile))
# pylint: enable=protected-access
my_file.close()
# opening twice in a row is okay
my_file = backend.open(filepath, mode)
my_file = backend.open(filepath, mode)
# force a close to throw an error
def close_error():
raise ArchiveInterfaceError("this is an error")
orig_close = backend._file.close
backend._file.close = close_error
hit_exception = False
try:
my_file = backend.open(filepath, mode)
except ArchiveInterfaceError, ex:
hit_exception = True
def test_posix_backend_create(self):
"""test creating a posix backend """
backend = PosixBackendArchive('/tmp')
self.assertTrue(isinstance(backend, PosixBackendArchive))
#easiest way to unit test is look at class variable
# pylint: disable=protected-access
self.assertEqual(backend._prefix, '/tmp')
def test_posix_backend_write(self):
"""test writing a file from posix backend"""
filepath = '1234'
mode = 'w'
backend = PosixBackendArchive('/tmp/')
my_file = backend.open(filepath, mode)
error = my_file.write("i am a test string")
self.assertEqual(error, None)
my_file.close()
def test_posix_backend_read(self):
"""test reading a file from posix backend"""
self.test_posix_backend_write()
filepath = '1234'
mode = 'r'
backend = PosixBackendArchive('/tmp/')
my_file = backend.open(filepath, mode)
buf = my_file.read(-1)
self.assertEqual(buf, "i am a test string")
my_file.close()
def test_posix_backend_close(self):
"""test closing a file from posix backend"""
filepath = '1234'
mode = 'w'
backend = PosixBackendArchive('/tmp/')
my_file = backend.open(filepath, mode)
#easiest way to unit test is look at class variable
# pylint: disable=protected-access
self.assertTrue(isinstance(backend._file, ExtendedFile))
my_file.close()
self.assertEqual(backend._file, None)
def test_posix_backend_failed_write(self):
"""test writing to a failed file"""
filepath = '1234'
mode = 'w'
backend = PosixBackendArchive('/tmp/')
# test failed write
my_file = backend.open(filepath, mode)
def write_error():
raise IOError("Unable to Write!")
backend._file.write = write_error
hit_exception = False
try:
backend.write('write stuff')
except ArchiveInterfaceError, ex:
hit_exception = True
self.assertTrue("Can't write posix file with error" in str(ex))
