from calculus.client_3 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(), '%s %d %d\r\n' % (operation, a, b)) self.tr.clear() d.addCallback(self.assertEqual, expected) self.proto.dataReceived("%d\r\n" % (expected,)) 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(), 'add 9 4\r\n') self.clock.advance(self.proto.timeOut) return self.assertFailure(d, ClientTimeoutError) def test_timeoutConnectionLost(self): called = [] def lost(arg): called.append(True) self.proto.connectionLost = lost d = self.proto.add(9, 4) self.assertEqual(self.tr.value(), 'add 9 4\r\n') self.clock.advance(self.proto.timeOut) def check(ignore): self.assertEqual(called, [True]) return self.assertFailure(d, ClientTimeoutError).addCallback(check)