Start ARC and sign in after Chrome OS login

chrome/browser/chromeos/arc/arc_session_manager_unittest.cc

Index: chrome/browser/chromeos/arc/arc_session_manager_unittest.cc
diff --git a/chrome/browser/chromeos/arc/arc_session_manager_unittest.cc b/chrome/browser/chromeos/arc/arc_session_manager_unittest.cc
index efdfe629e5ffb024eff224ebad20fb3453129379..fae9ccc8b2b78e04def4d318673e6128bab12328 100644
--- a/chrome/browser/chromeos/arc/arc_session_manager_unittest.cc
+++ b/chrome/browser/chromeos/arc/arc_session_manager_unittest.cc
@@ -35,6 +35,7 @@
 #include "chrome/browser/prefs/pref_service_syncable_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
+#include "chrome/browser/ui/app_list/arc/arc_app_test.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_profile.h"
@@ -434,6 +435,45 @@ TEST_F(ArcSessionManagerTest, IgnoreSecondErrorReporting) {
   arc_session_manager()->Shutdown();
 }
 
+class ArcSessionManagerArcAlwaysStartTest : public ArcSessionManagerTest {
+ public:
+  ArcSessionManagerArcAlwaysStartTest() = default;
+
+  void SetUp() override {
+    SetArcAlwaysStartForTesting();
+    ArcSessionManagerTest::SetUp();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ArcSessionManagerArcAlwaysStartTest);
+};
+
+TEST_F(ArcSessionManagerArcAlwaysStartTest, BaseWorkflow) {
+  // TODO(victorhsieh): Consider also tracking sign-in activity, which is
+  // initiated from the Android side.
+  EXPECT_TRUE(arc_session_manager()->arc_start_time().is_null());
+
+  arc_session_manager()->SetProfile(profile());
+
+  // By default ARC is not enabled.
+  EXPECT_EQ(ArcSessionManager::State::STOPPED, arc_session_manager()->state());
+
+  // When ARC is always started, ArcSessionManager should always be in ACTIVE
+  // state.
+  arc_session_manager()->RequestEnable();
+  base::RunLoop().RunUntilIdle();
+  ASSERT_EQ(ArcSessionManager::State::ACTIVE, arc_session_manager()->state());
+
+  arc_session_manager()->StartArcForTesting();
+
+  EXPECT_FALSE(arc_session_manager()->arc_start_time().is_null());
+
+  ASSERT_EQ(ArcSessionManager::State::ACTIVE, arc_session_manager()->state());
+  ASSERT_TRUE(arc_session_manager()->IsSessionRunning());
+
+  arc_session_manager()->Shutdown();
+}
+
 class ArcSessionManagerPolicyTest
     : public ArcSessionManagerTest,
       public testing::WithParamInterface<std::tuple<base::Value, base::Value>> {