PR test fixes

Author: katcharov

driver-core/src/main/com/mongodb/internal/connection/OidcAuthenticator.java

@@ -573,9 +573,7 @@ public static void validateCreateOidcCredential(@Nullable final char[] password)
 
         @VisibleForTesting(otherwise = VisibleForTesting.AccessModifier.PACKAGE)
         public static void validateBeforeUse(final MongoCredential credential) {
-            AuthenticationMechanism mechanism = credential.getAuthenticationMechanism();
             String userName = credential.getUserName();
-            assertTrue(mechanism == AuthenticationMechanism.MONGODB_OIDC);
             Object providerName = credential.getMechanismProperty(PROVIDER_NAME_KEY, null);
             Object requestCallback = credential.getMechanismProperty(REQUEST_TOKEN_CALLBACK_KEY, null);
             Object refreshCallback = credential.getMechanismProperty(REFRESH_TOKEN_CALLBACK_KEY, null);

driver-core/src/test/unit/com/mongodb/AuthConnectionStringTest.java

@@ -113,20 +113,18 @@ private MongoCredential getMongoCredential() {
         MongoCredential credential = connectionString.getCredential();
         if (credential != null) {
             BsonArray callbacks = (BsonArray) getExpectedValue("callback");
-            if (callbacks != null) {
-                for (BsonValue v : callbacks) {
-                    String string = ((BsonString) v).getValue();
-                    if ("oidcRequest".equals(string)) {
-                        credential = credential.withMechanismProperty(
-                                REQUEST_TOKEN_CALLBACK_KEY,
-                                (MongoCredential.OidcRequestCallback) (context) -> null);
-                    } else if ("oidcRefresh".equals(string)) {
-                        credential = credential.withMechanismProperty(
-                                REFRESH_TOKEN_CALLBACK_KEY,
-                                (MongoCredential.OidcRefreshCallback) (context) -> null);
-                    } else {
-                        fail("Unsupported callback: " + string);
-                    }
+            for (BsonValue v : callbacks) {
+                String string = ((BsonString) v).getValue();
+                if ("oidcRequest".equals(string)) {
+                    credential = credential.withMechanismProperty(
+                            REQUEST_TOKEN_CALLBACK_KEY,
+                            (MongoCredential.OidcRequestCallback) (context) -> null);
+                } else if ("oidcRefresh".equals(string)) {
+                    credential = credential.withMechanismProperty(
+                            REFRESH_TOKEN_CALLBACK_KEY,
+                            (MongoCredential.OidcRefreshCallback) (context) -> null);
+                } else {
+                    fail("Unsupported callback: " + string);
                 }
             }
             OidcAuthenticator.OidcValidator.validateBeforeUse(credential);