Add unit test for GIDKeychainHandler

GoogleSignIn/Tests/Unit/GIDKeychainHandlerTest.m

@@ -0,0 +1,81 @@
+// Copyright 2022 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 "GoogleSignIn/Sources/GIDKeychainHandler/Implementations/GIDKeychainHandler.h"
+
+#import <XCTest/XCTest.h>
+
+#import "GoogleSignIn/Tests/Unit/OIDAuthState+Testing.h"
+#import "GoogleSignIn/Tests/Unit/OIDTokenResponse+Testing.h"
+
+#ifdef SWIFT_PACKAGE
+@import AppAuth;
+@import GTMAppAuth;
+@import OCMock;
+#else
+#import <AppAuth/AppAuth.h>
+#import <GTMAppAuth/GTMAppAuth.h>
+#import <OCMock/OCMock.h>
+#endif
+
+static NSTimeInterval const kIDTokenExpiresIn = 100;
+
+@interface GIDKeychainHandlerTest : XCTestCase {
+  GIDKeychainHandler *_keychainHandler;
+  id _authorization;
+}
+
+@end
+
+@implementation GIDKeychainHandlerTest
+
+- (void)setUp {
+  _keychainHandler = [[GIDKeychainHandler alloc] init];
+  _authorization = OCMStrictClassMock([GTMAppAuthFetcherAuthorization class]);
+}
+
+- (void)testLoadAuthState {
+  [_keychainHandler loadAuthState];
+  [[_authorization verify] authorizationFromKeychainForName:[OCMArg any]
+                                  useDataProtectionKeychain:YES];
+}
+
+- (void)testSaveAuthState {
+  NSString *idToken = [self idTokenWithExpiresIn:kIDTokenExpiresIn];
+  OIDAuthState *authState = [OIDAuthState testInstanceWithIDToken:idToken
+                                                      accessToken:kAccessToken
+                                             accessTokenExpiresIn:kAccessTokenExpiresIn
+                                                     refreshToken:kRefreshToken];
+
+  [_keychainHandler saveAuthState:authState];
+  [[_authorization verify] saveAuthorization:[OCMArg any]
+                           toKeychainForName:[OCMArg any]
+                   useDataProtectionKeychain:YES];
+}
+
+- (void)testRemoveAllKeychainEntries {
+  [_keychainHandler removeAllKeychainEntries];
+  [[_authorization verify] removeAuthorizationFromKeychainForName:[OCMArg any]
+                                        useDataProtectionKeychain:YES];
+}
+
+#pragma mark - Helpers
+
+- (NSString *)idTokenWithExpiresIn:(NSTimeInterval)expiresIn {
+  // The expireTime should be based on 1970.
+  NSTimeInterval expireTime = [[NSDate date] timeIntervalSince1970] + expiresIn;
+  return [OIDTokenResponse idTokenWithSub:kUserID exp:@(expireTime)];
+}
+
+@end