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filesystemtest.py
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filesystemtest.py
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'''
Created on 25/08/2013
@author: robert
'''
import unittest
from drive import Drive
from filesystem import A2File, Volume
class Test(unittest.TestCase):
# This test is commented out because it tests the underlying Drive class (and it passes).
# def test_drive(self):
# blocks = 10
# drive = Drive.format('drive.txt', blocks)
# self.assertEqual(blocks, drive.num_blocks(), 'number of blocks')
# self.assertEqual(blocks * Drive.BLK_SIZE, drive.num_bytes(), 'number of bytes')
# data = b'hello world12345'
# block_data = b' ' * Drive.BLK_SIZE
# block_data = data + block_data[len(data):]
# with self.assertRaises(IOError):
# drive.write_block(-1, block_data)
# with self.assertRaises(IOError):
# drive.write_block(blocks, block_data)
# with self.assertRaises(ValueError):
# drive.write_block(0, b'wrong size')
# with self.assertRaises(IOError):
# drive.read_block(-1)
# with self.assertRaises(IOError):
# drive.read_block(blocks)
# drive.write_block(0, block_data)
# self.assertEqual(block_data, drive.read_block(0), 'written data not read')
# drive.write_block(blocks - 1, block_data)
# self.assertEqual(block_data, drive.read_block(blocks - 1), 'written data not read')
# drive.disconnect()
# with self.assertRaises(ValueError):
# drive.read_block(0)
# drive = Drive.reconnect('drive.txt')
# self.assertEqual(block_data, drive.read_block(0), 'written data not read')
# drive.disconnect()
def test_new_volume(self):
blocks = 10
drive_name = 'driveA.txt'
drive = Drive.format(drive_name, blocks)
with self.assertRaises(ValueError):
Volume.format(drive, b'')
with self.assertRaises(ValueError):
Volume.format(drive, b'Volume\nA')
with self.assertRaises(ValueError):
Volume.format(drive, b'a' * blocks * Drive.BLK_SIZE)
name = b'new volume test'
volume = Volume.format(drive, name)
self.assertEqual(1, volume.volume_data_blocks())
self.assertEqual(name, volume.name())
self.assertEqual(blocks, volume.size())
self.assertEqual(b'x--------x', volume.bitmap())
self.assertEqual(9, volume.root_index())
volume.unmount()
def test_long_volume_name(self):
blocks = 10
drive_name = 'driveB.txt'
drive = Drive.format(drive_name, blocks)
name = b'long volume name' * 10
volume = Volume.format(drive, name)
self.assertEqual(3, volume.volume_data_blocks())
self.assertEqual(name, volume.name())
self.assertEqual(blocks, volume.size())
self.assertEqual(b'xxx------x', volume.bitmap())
self.assertEqual(9, volume.root_index())
volume.unmount()
def test_reconnect_drive(self):
blocks = 10
drive_name = 'driveC.txt'
drive = Drive.format(drive_name, blocks)
drive.disconnect()
with self.assertRaises(IOError):
Drive.reconnect('badname')
drive = Drive.reconnect(drive_name)
self.assertEqual(blocks * Drive.BLK_SIZE, drive.num_bytes())
name = b'reconnect volume'
volume = Volume.format(drive, name)
volume.unmount()
with self.assertRaises(IOError):
Volume.mount('driveZ')
volume = Volume.mount(drive_name)
self.assertEqual(1, volume.volume_data_blocks())
self.assertEqual(name, volume.name())
self.assertEqual(blocks, volume.size())
self.assertEqual(b'x--------x', volume.bitmap())
self.assertEqual(9, volume.root_index())
volume.unmount()
def test_simple_file_creation(self):
# the Volume didn't call format in the original
volume = Volume.format(Drive.format('driveD.txt', 8), b'file creation volume')
with self.assertRaises(ValueError):
volume.open(b'fileA\n')
file = volume.open(b'fileA')
self.assertEqual(0, file.size())
data = b'Hello from fileA'
file.write(0, data)
self.assertEqual(len(data), file.size())
file.write(file.size(), data)
self.assertEqual(2 * len(data), file.size())
file = volume.open(b'fileB')
data = b'Welcome to fileB'
file.write(50, data)
self.assertEqual(50 + len(data), file.size())
volume.unmount()
def test_file_reads(self):
volume = Volume.format(Drive.format('driveE.txt', 8), b'file read volume')
file = volume.open(b'fileA')
data = b'A different fileA'
file.write(0, data)
with self.assertRaises(IOError):
file.read(30, 1)
with self.assertRaises(IOError):
file.read(0, 50)
self.assertEqual(data, file.read(0, len(data)))
self.assertEqual(b'if', file.read(3, 2))
file.write(file.size(), b'Aaargh' * 10)
self.assertEqual(b'arghAaarghAaargh', file.read(61, 16))
volume.unmount()
def test_reconnect_drive_with_files(self):
drive_name = 'driveF.txt'
volume = Volume.format(Drive.format(drive_name, 12), b'reconnect with files volume')
filenames = [b'file1', b'file2', b'file3', b'file4']
files = [volume.open(name) for name in filenames]
for i, file in enumerate(files):
file.write(0, bytes(str(i).encode()) * 64)
files[0].write(files[0].size(), b'a')
volume.unmount()
volume = Volume.mount(drive_name)
file4 = volume.open(b'file4')
self.assertEqual(b'3333', file4.read(0, 4))
file1 = volume.open(b'file1')
self.assertEqual(65, file1.size())
self.assertEqual(b'0a', file1.read(63, 2))
volume.unmount()
if __name__ == "__main__":
unittest.main()