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Prefer make_awaitable over defer.succeed in tests (#12505)

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When configuring the return values of mocks, prefer awaitables from
`make_awaitable` over `defer.succeed`. `Deferred`s are only awaitable
once, so it is inappropriate for a mock to return the same `Deferred`
multiple times.

Also update `run_in_background` to support functions that return
arbitrary awaitables.

Signed-off-by: Sean Quah <seanq@element.io>
This commit is contained in:
Sean Quah 2022-04-27 14:58:26 +01:00 • committed by GitHub
parent 5ef673de4f
commit 78b99de7c2
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14 changed files with 72 additions and 69 deletions
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7
tests/rest/client/test_transactions.py
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@ -22,6 +22,7 @@ from synapse.rest.client.transactions import CLEANUP_PERIOD_MS, HttpTransactionC
from synapse.util import Clock
from tests import unittest
from tests.test_utils import make_awaitable
from tests.utils import MockClock
@ -38,7 +39,7 @@ class HttpTransactionCacheTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_executes_given_function(self):
cb = Mock(return_value=defer.succeed(self.mock_http_response))
cb = Mock(return_value=make_awaitable(self.mock_http_response))
res = yield self.cache.fetch_or_execute(
self.mock_key, cb, "some_arg", keyword="arg"
)
@ -47,7 +48,7 @@ class HttpTransactionCacheTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_deduplicates_based_on_key(self):
cb = Mock(return_value=defer.succeed(self.mock_http_response))
cb = Mock(return_value=make_awaitable(self.mock_http_response))
for i in range(3): # invoke multiple times
res = yield self.cache.fetch_or_execute(
self.mock_key, cb, "some_arg", keyword="arg", changing_args=i
@ -130,7 +131,7 @@ class HttpTransactionCacheTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_cleans_up(self):
cb = Mock(return_value=defer.succeed(self.mock_http_response))
cb = Mock(return_value=make_awaitable(self.mock_http_response))
yield self.cache.fetch_or_execute(self.mock_key, cb, "an arg")
# should NOT have cleaned up yet
self.clock.advance_time_msec(CLEANUP_PERIOD_MS / 2)