test: switch to regex rather than asserting against whole object (#497)

Fixes:  #449, #492

Author: bcoe

tests/unit/test_client_options.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from re import match
 import pytest
 
 from google.api_core import client_options
@@ -144,10 +145,21 @@ def test_from_dict_bad_argument():
 
 
 def test_repr():
-    options = client_options.ClientOptions(api_endpoint="foo.googleapis.com")
-
-    assert (
-        repr(options)
-        == "ClientOptions: {'api_endpoint': 'foo.googleapis.com', 'client_cert_source': None, 'client_encrypted_cert_source': None, 'api_key': None}"
-        or "ClientOptions: {'client_encrypted_cert_source': None, 'client_cert_source': None, 'api_endpoint': 'foo.googleapis.com', 'api_key': None}"
+    expected_keys = set(
+        [
+            "api_endpoint",
+            "client_cert_source",
+            "client_encrypted_cert_source",
+            "quota_project_id",
+            "credentials_file",
+            "scopes",
+            "api_key",
+            "api_audience",
+        ]
     )
+    options = client_options.ClientOptions(api_endpoint="foo.googleapis.com")
+    options_repr = repr(options)
+    options_keys = vars(options).keys()
+    assert match(r"ClientOptions:", options_repr)
+    assert match(r".*'api_endpoint': 'foo.googleapis.com'.*", options_repr)
+    assert options_keys == expected_keys