Add test confirming that login works without contact obj URI (#2983)

This is a follow-up to PR #2954.

Author: CydeWeys

core/src/test/java/google/registry/flows/session/LoginFlowTestCase.java

@@ -133,7 +133,7 @@ void testFailure_invalidContactObjectUri() {
   }
 
   @Test
-  void testSuccess_contactObjectUri_worksWhenNotProhibited() throws Exception {
+  void testSuccess_contactObjectUriSent_worksWhenNotProhibited() throws Exception {
     persistResource(
         FeatureFlag.get(PROHIBIT_CONTACT_OBJECTS_ON_LOGIN)
             .asBuilder()
@@ -142,6 +142,16 @@ void testSuccess_contactObjectUri_worksWhenNotProhibited() throws Exception {
     doSuccessfulTest("login_with_contact_objuri.xml");
   }
 
+  @Test
+  void testSuccess_contactObjectUriNotSent_worksWhenNotProhibited() throws Exception {
+    persistResource(
+        FeatureFlag.get(PROHIBIT_CONTACT_OBJECTS_ON_LOGIN)
+            .asBuilder()
+            .setStatusMap(ImmutableSortedMap.of(START_OF_TIME, FeatureStatus.INACTIVE))
+            .build());
+    doSuccessfulTest("login_valid.xml");
+  }
+
   @Test
   void testFailure_invalidTypes() {
     doFailingTest("login_invalid_types.xml", UnimplementedObjectServiceException.class);