def test_real_world_example(self):
def cb(res, _):
with open(os.path.join(os.path.dirname(__file__),
'data.json')) as f:
res(f.read())
call = Call(cb) \
.then(lambda data: json.loads(data)) \
.then(lambda data: data['app-id']) \
.catch(lambda err: 'Whoops')
call.then(print)
try:
value = call.wait()
except Exception:
self.fail(
'Call.wait shouldn\'t throw as it is being caught in the chain'
)
self.assertEqual(value, 'Whoops')
def test_chains(self):
call = Call(
self.callback_resolves_delay).then(lambda val: val + ' appended')
result = call.wait()
self.assertEqual(result, 'Data appended')
def test_chains_fail(self):
call = Call(self.callback_rejects_delay).catch(lambda err: err)
res = call.wait()
self.assertEqual(res, 'Fail')
def test_callback(self):
call = Call(self.callback_resolves_delay)
result = call.wait()
self.assertEqual(result, 'Data')