Upstream Chrome on iOS source code [3/11].

ios/chrome/browser/ui/authentication/signed_in_accounts_view_controller_unittest.mm

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "ios/chrome/browser/ui/authentication/signed_in_accounts_view_controller.h"
+
+#include <memory>
+
+#include "base/strings/sys_string_conversions.h"
+#include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
+#include "ios/chrome/browser/signin/authentication_service_factory.h"
+#import "ios/chrome/browser/signin/authentication_service_fake.h"
+#include "ios/chrome/test/block_cleanup_test.h"
+#include "ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h"
+#include "ios/web/public/test/test_web_thread_bundle.h"
+#import "testing/gtest_mac.h"
+#include "testing/platform_test.h"
+
+class SignedInAccountsViewControllerTest : public BlockCleanupTest {
+ public:
+  void SetUp() override {
+    BlockCleanupTest::SetUp();
+
+    TestChromeBrowserState::Builder builder;
+    builder.AddTestingFactory(
+        AuthenticationServiceFactory::GetInstance(),
+        AuthenticationServiceFake::CreateAuthenticationService);
+    browser_state_ = builder.Build();
+    auth_service_ = static_cast<AuthenticationServiceFake*>(
+        AuthenticationServiceFactory::GetInstance()->GetForBrowserState(
+            browser_state_.get()));
+    ios::FakeChromeIdentityService* identity_service =
+        ios::FakeChromeIdentityService::GetInstanceFromChromeProvider();
+    identity_service->AddIdentities(
+        @[ @"identity1", @"identity2", @"identity3" ]);
+    auth_service_->SignIn(
+        [identity_service->GetAllIdentitiesSortedForDisplay() objectAtIndex:0],
+        std::string());
+  }
+
+ protected:
+  web::TestWebThreadBundle thread_bundle_;
+  AuthenticationServiceFake* auth_service_;
+  std::unique_ptr<TestChromeBrowserState> browser_state_;
+};
+
+// Tests that the signed in accounts view shouldn't be presented when the
+// accounts haven't changed.
+TEST_F(SignedInAccountsViewControllerTest,
+       ShouldBePresentedForBrowserStateNotNecessary) {
+  EXPECT_FALSE([SignedInAccountsViewController
+      shouldBePresentedForBrowserState:browser_state_.get()]);
+}
+
+// Tests that the signed in accounts view should be presented when the accounts
+// have changed.
+TEST_F(SignedInAccountsViewControllerTest,
+       ShouldBePresentedForBrowserStateNecessary) {
+  auth_service_->SetHaveAccountsChanged(true);
+  EXPECT_TRUE([SignedInAccountsViewController
+      shouldBePresentedForBrowserState:browser_state_.get()]);
+}