Additional test tweaks to prevent non-significant failures

Surprisingly, these tweaks are not needed without the other changes in
this PR.

Author: vchudnov-g

tests/unit/test_bidi.py

@@ -828,6 +828,10 @@ def test_rpc_callback_fires_when_consumer_start_fails(self):
         bidi_rpc._start_rpc.side_effect = expected_exception
 
         consumer = bidi.BackgroundConsumer(bidi_rpc, on_response=None)
+        # Wait for the consumer's thread to exit.
+        while consumer.is_active:
+            pass
+
         consumer.start()
         assert callback.call_args.args[0] == grpc.StatusCode.INVALID_ARGUMENT
 

tests/unit/test_timeout.py

@@ -14,6 +14,7 @@
 
 import datetime
 import itertools
+import pytest
 from unittest import mock
 
 from google.api_core import timeout as timeouts
@@ -121,7 +122,15 @@ def test_apply_passthrough(self):
 
         wrapped(1, 2, meep="moop")
 
-        target.assert_called_once_with(1, 2, meep="moop", timeout=42.0)
+        actual_arg_0 = target.call_args[0][0]
+        actual_arg_1 = target.call_args[0][1]
+        actual_arg_meep = target.call_args[1]["meep"]
+        actual_arg_timeuut = target.call_args[1]["timeout"]
+
+        assert actual_arg_0 == 1
+        assert actual_arg_1 == 2
+        assert actual_arg_meep == "moop"
+        assert actual_arg_timeuut == pytest.approx(42.0, abs=0.01)
 
 
 class TestConstantTimeout(object):