unit tests added, need to fix bug causing error in tests before these are reached

test/test_msr_routes.py

@@ -346,3 +346,25 @@ def test_get_vpn_proxy_peerings(client, mocked_redis):
     response_data = json.loads(rv.data.decode('utf-8'))
     jsonschema.validate(response_data, VPN_PROXY_LIST_SCHEMA)
     assert response_data  # test data is non-empty
+
+
+@pytest.mark.parametrize('endpoint_variant', [
+    "",  # default, no filter
+    "/378",
+    "?group=IAS-NRENS",
+    "?instance=IAS",
+    "?group=IAS-NRENS&instance=IAS",
+    "/378?group=IAS-NRENS",
+    "/378?instance=IAS",
+    "/378?group=IAS-NRENS&instance=IAS"
+])
+def test_get_asn_peers(endpoint_variant, client, mocked_redis):
+    rv = client.get(
+        f'/msr/asn-peers{endpoint_variant}',
+        headers=DEFAULT_REQUEST_HEADERS
+    )
+    assert rv.status_code == 200
+    assert rv.is_json
+    response_data = json.loads(rv.data.decode('utf-8'))
+    jsonschema.validate(response_data, PEERING_LIST_SCHEMA)
+    assert response_data  # test data is non-empty