update fake and create test

Author: camden-king

GoogleSignIn/Sources/GIDAuthStateMigration/GIDAuthStateMigration.m

@@ -12,7 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+<<<<<<< HEAD
 #import "GoogleSignIn/Sources/GIDAuthStateMigration.h"
+=======
+#import "GoogleSignIn/Sources/GIDAuthStateMigration/GIDAuthStateMigration.h"
+>>>>>>> 43b6160 (update fake and create test)
 
 #import "GoogleSignIn/Sources/GIDSignInCallbackSchemes.h"
 
@@ -107,10 +111,13 @@ - (void)performDataProtectedMigrationIfNeeded {
   if (authSession) {
     NSError *err;
     [self.keychainStore saveAuthSession:authSession error:&err];
+<<<<<<< HEAD
     // If we're unable to save to the keychain, return without marking migration performed.
     if (err) {
       return;
     };
+=======
+>>>>>>> 43b6160 (update fake and create test)
     [keychainStoreLegacy removeAuthSessionWithError:nil];
   }
 
@@ -138,10 +145,13 @@ - (void)performGIDMigrationIfNeededWithTokenURL:(NSURL *)tokenURL
   if (authSession) {
     NSError *err;
     [self.keychainStore saveAuthSession:authSession error:&err];
+<<<<<<< HEAD
     // If we're unable to save to the keychain, return without marking migration performed.
     if (err) {
       return;
     };
+=======
+>>>>>>> 43b6160 (update fake and create test)
   }
 
   // Mark the migration check as having been performed.

GoogleSignIn/Sources/GIDAuthStateMigration/Implementation/GIDAuthStateMigration.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class GTMKeychainStore;
+@class GTMAuthSession;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// A class providing migration support for auth state saved by older versions of the SDK.
+@interface GIDAuthStateMigration : NSObject
+
+/// Creates an instance of this migration type with the keychain storage wrapper it will use.
+- (instancetype)initWithKeychainStore:(GTMKeychainStore *)keychainStore NS_DESIGNATED_INITIALIZER;
+
+/// Perform necessary migrations from legacy auth state storage to most recent GTMAppAuth version.
+- (void)migrateIfNeededWithTokenURL:(NSURL *)tokenURL
+                       callbackPath:(NSString *)callbackPath
+                       keychainName:(NSString *)keychainName
+                     isFreshInstall:(BOOL)isFreshInstall;
+
+@end
+
+NS_ASSUME_NONNULL_END