from calculus.client_2 import RemoteCalculationClient, ClientTimeoutError from twisted.internet import task from twisted.trial import unittest from twisted.test import proto_helpers class ClientCalculationTestCase(unittest.TestCase): def setUp(self): self.tr = proto_helpers.StringTransportWithDisconnection() self.clock = task.Clock() self.proto = RemoteCalculationClient() self.tr.protocol = self.proto self.proto.callLater = self.clock.callLater self.proto.makeConnection(self.tr) def _test(self, operation, a, b, expected): d = getattr(self.proto, operation)(a, b) self.assertEqual( self.tr.value(), u'{} {} {}\r\n'.format(operation, a, b).encode('utf-8') ) self.tr.clear() d.addCallback(self.assertEqual, expected) self.proto.dataReceived(u"{}\r\n".format(expected).encode('utf-8')) return d def test_add(self): return self._test('add', 7, 6, 13) def test_subtract(self): return self._test('subtract', 82, 78, 4) def test_multiply(self): return self._test('multiply', 2, 8, 16) def test_divide(self): return self._test('divide', 14, 3, 4) def test_timeout(self): d = self.proto.add(9, 4) self.assertEqual(self.tr.value(), b'add 9 4\r\n') self.clock.advance(self.proto.timeOut) return self.assertFailure(d, ClientTimeoutError)