def test_read_less_than_page_size(self): with open(self.file, 'w') as file: file.write('F' * 512) file.write('B' * 1024) raw = RawDirect(self.file) # Ask to only read 10 bytes self.assertRaises(OSError, raw.read, 10) # Read 512 bytes self.assertEquals(raw.read(512), 'F' * 512) # Read 1024 self.assertEquals(raw.read(1024), 'B' * 1024) raw.close()
def test_read_past_eof(self): # Create a file that is less than the block size fd, file = tempfile.mkstemp(dir='/tmp') os.write(fd, 'A' * 511) os.close(fd) raw = RawDirect(file) # If requested read is past the EOF # return the bytes we actually read self.assertEquals(raw.read(512), ('A' * 511)) # Empty string means we are at EOF self.assertEquals(raw.read(512), '') raw.close()
def test_write_less_than_page_size(self): raw = RawDirect(self.file) # Write only 10 bytes self.assertRaises(OSError, raw.write, ('G' * 10)) # Write 512 self.assertEquals(raw.write('A' * 512), 512) # Write 1024 self.assertEquals(raw.write('B' * 1024), 1024) # Ensure the data is there raw.seek(0) self.assertEquals(raw.read(512), 'A' * 512) self.assertEquals(raw.read(1024), 'B' * 1024) raw.close()
def test_read(self): with open(self.file, 'w') as file: file.write('B' * 512) raw = RawDirect(self.file) self.assertEquals(raw.read(512), 'B' * 512) raw.close()
def test_read_greater_than_page_size(self): with open(self.file, 'w') as file: file.write('J' * 8192) raw = RawDirect(self.file) # Ask to read 8 more bytes then the block size self.assertRaises(OSError, raw.read, 520) # Read 8192 ( double the typical page size ) self.assertEquals(raw.read(8192), 'J' * 8192) raw.close()
def test_tell(self): raw = RawDirect(self.file) raw.write('A' * 512) self.assertEquals(raw.tell(), 512) raw.write('B' * 512) self.assertEquals(raw.tell(), 1024) raw.seek(0) self.assertEquals(raw.read(512), ('A' * 512)) self.assertEquals(raw.read(512), ('B' * 512)) self.assertEquals(raw.tell(), 1024)