diff --git a/tests/server_notices/test_resource_limits_server_notices.py b/tests/server_notices/test_resource_limits_server_notices.py
new file mode 100644
index 0000000000..a69253f1b6
--- /dev/null
+++ b/tests/server_notices/test_resource_limits_server_notices.py
@@ -0,0 +1,125 @@
+from mock import Mock
+
+from twisted.internet import defer
+
+from synapse.api.errors import AuthError
+from synapse.handlers.auth import AuthHandler
+from synapse.server_notices.resource_limits_server_notices import (
+ ResourceLimitsServerNotices,
+)
+
+from tests import unittest
+from tests.utils import setup_test_homeserver
+
+
+class AuthHandlers(object):
+ def __init__(self, hs):
+ self.auth_handler = AuthHandler(hs)
+
+
+class TestResourceLimitsServerNotices(unittest.TestCase):
+ @defer.inlineCallbacks
+ def setUp(self):
+ self.hs = yield setup_test_homeserver(handlers=None)
+ self.hs.handlers = AuthHandlers(self.hs)
+ self.auth_handler = self.hs.handlers.auth_handler
+ self.server_notices_sender = self.hs.get_server_notices_sender()
+
+ # relying on [1] is far from ideal, but the only case where
+ # ResourceLimitsServerNotices class needs to be isolated is this test,
+ # general code should never have a reason to do so ...
+ self._rlsn = self.server_notices_sender._server_notices[1]
+ if not isinstance(self._rlsn, ResourceLimitsServerNotices):
+ raise Exception("Failed to find reference to ResourceLimitsServerNotices")
+
+ self._rlsn._store.user_last_seen_monthly_active = Mock(
+ return_value=defer.succeed(1000)
+ )
+ self._send_notice = self._rlsn._server_notices_manager.send_notice
+ self._rlsn._server_notices_manager.send_notice = Mock()
+ self._send_notice = self._rlsn._server_notices_manager.send_notice
+
+ self._rlsn._limit_usage_by_mau = True
+ self.user_id = "user_id"
+
+ @defer.inlineCallbacks
+ def test_maybe_send_server_notice_to_user_flag_off(self):
+ """Tests cases where the flags indicate nothing to do"""
+ # test hs disabled case
+ self._hs_disabled = True
+
+ yield self._rlsn.maybe_send_server_notice_to_user("user_id")
+
+ self._send_notice.assert_not_called()
+ # Test when mau limiting disabled
+ self._hs_disabled = False
+ self._rlsn._limit_usage_by_mau = False
+ yield self._rlsn.maybe_send_server_notice_to_user("user_id")
+
+ self._send_notice.assert_not_called()
+
+ @defer.inlineCallbacks
+ def test_maybe_send_server_notice_to_user_remove_blocked_notice(self):
+ """Test when user has blocked notice, but should have it removed"""
+
+ self._rlsn._notified_of_blocking.add(self.user_id)
+ self._rlsn.auth.check_auth_blocking = Mock()
+
+ yield self._rlsn.maybe_send_server_notice_to_user(self.user_id)
+ # "remove warning" obviously aweful, but test will start failing when code
+ # actually sends a real event, and then it can be updated
+
+ self._send_notice.assert_called_once_with(self.user_id, "remove warning")
+ self.assertFalse(self.user_id in self._rlsn._notified_of_blocking)
+
+ @defer.inlineCallbacks
+ def test_maybe_send_server_notice_to_user_remove_blocked_notice_noop(self):
+ """Test when user has blocked notice, but notice ought to be there (NOOP)"""
+ self._rlsn._notified_of_blocking.add(self.user_id)
+ self._rlsn.auth.check_auth_blocking = Mock(
+ side_effect=AuthError(403, 'foo')
+ )
+
+ yield self._rlsn.maybe_send_server_notice_to_user("user_id")
+
+ self._send_notice.assert_not_called()
+ self.assertTrue(self.user_id in self._rlsn._notified_of_blocking)
+
+ @defer.inlineCallbacks
+ def test_maybe_send_server_notice_to_user_add_blocked_notice(self):
+ """Test when user does not have blocked notice, but should have one"""
+
+ self._rlsn.auth.check_auth_blocking = Mock(side_effect=AuthError(403, 'foo'))
+ yield self._rlsn.maybe_send_server_notice_to_user("user_id")
+
+ # "add warning" obviously awful, but test will start failing when code
+ # actually sends a real event, and then it can be updated
+ self._send_notice.assert_called_once_with(self.user_id, "add warning")
+ self.assertTrue(self.user_id in self._rlsn._notified_of_blocking)
+
+ @defer.inlineCallbacks
+ def test_maybe_send_server_notice_to_user_add_blocked_notice_noop(self):
+ """Test when user does not have blocked notice, nor should they (NOOP)"""
+
+ self._rlsn.auth.check_auth_blocking = Mock()
+
+ yield self._rlsn.maybe_send_server_notice_to_user(self.user_id)
+
+ self._send_notice.assert_not_called()
+ self.assertFalse(self.user_id in self._rlsn._notified_of_blocking)
+
+ @defer.inlineCallbacks
+ def test_maybe_send_server_notice_to_user_not_in_mau_cohort(self):
+
+ """Test when user is not part of the MAU cohort - this should not ever
+ happen - but ...
+ """
+
+ self._rlsn.auth.check_auth_blocking = Mock()
+ self._rlsn._store.user_last_seen_monthly_active = Mock(
+ return_value=defer.succeed(None)
+ )
+ yield self._rlsn.maybe_send_server_notice_to_user(self.user_id)
+
+ self._send_notice.assert_not_called()
+ self.assertFalse(self.user_id in self._rlsn._notified_of_blocking)
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