Introduce lock_screen_apps to chrome/browser/chromeos

chrome/browser/chromeos/lock_screen_apps/state_controller_unittest.cc

+// Copyright 2017 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.
+
+#include <memory>
+
+#include "base/memory/ptr_util.h"
+#include "base/test/scoped_command_line.h"
+#include "chrome/browser/chromeos/lock_screen_apps/state_controller.h"
+#include "chrome/browser/chromeos/lock_screen_apps/state_observer.h"
+#include "chrome/browser/chromeos/lock_screen_apps/types.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+const lock_screen_apps::Action kTestAction = lock_screen_apps::Action::kNewNote;
+
+class TestStateObserver : public lock_screen_apps::StateObserver {
+ public:
+  TestStateObserver() = default;
+  ~TestStateObserver() override = default;
+
+  void OnLockScreenAppsStateChanged(
+      lock_screen_apps::Action action,
+      lock_screen_apps::ActionState state) override {
+    ASSERT_EQ(kTestAction, action);
+
+    state_change_count_++;

[xiyuan, 2017/05/02 18:12:23]

nit: pre-inc, i.e. ++state_change_count_;

[tbarzic, 2017/05/02 18:43:37]

Done.

+  }
+
+  int state_change_count() const { return state_change_count_; }
+
+ private:
+  int state_change_count_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(TestStateObserver);
+};
+
+class LockScreenAppStateControllerNotSupportedTest : public testing::Test {
+ public:
+  LockScreenAppStateControllerNotSupportedTest() = default;
+
+  ~LockScreenAppStateControllerNotSupportedTest() override = default;
+
+  void SetUp() override {
+    command_line_ = base::MakeUnique<base::test::ScopedCommandLine>();
+    command_line_->GetProcessCommandLine()->InitFromArgv({""});
+  }
+
+ private:
+  std::unique_ptr<base::test::ScopedCommandLine> command_line_;
+
+  DISALLOW_COPY_AND_ASSIGN(LockScreenAppStateControllerNotSupportedTest);
+};
+
+class LockScreenAppStateControllerTest : public testing::Test {
+ public:
+  LockScreenAppStateControllerTest() = default;
+  ~LockScreenAppStateControllerTest() override = default;
+
+  void SetUp() override {
+    command_line_ = base::MakeUnique<base::test::ScopedCommandLine>();
+    command_line_->GetProcessCommandLine()->InitFromArgv(
+        {"", "--enable-lock-screen-apps"});
+
+    state_controller_ = lock_screen_apps::StateController::Get();
+    ASSERT_TRUE(state_controller_);
+
+    state_controller_->AddObserver(&observer_);
+  }
+
+  void TearDown() override { state_controller_->RemoveObserver(&observer_); }
+
+  const TestStateObserver& observer() const { return observer_; }
+
+  lock_screen_apps::StateController* state_controller() {
+    return state_controller_;
+  }
+
+ private:
+  std::unique_ptr<base::test::ScopedCommandLine> command_line_;
+
+  lock_screen_apps::StateController* state_controller_;
+  TestStateObserver observer_;
+
+  DISALLOW_COPY_AND_ASSIGN(LockScreenAppStateControllerTest);
+};
+
+}  // namespace
+
+TEST_F(LockScreenAppStateControllerNotSupportedTest, NoControllerInstance) {
+  EXPECT_FALSE(lock_screen_apps::StateController::Get());
+}
+
+TEST_F(LockScreenAppStateControllerTest, InitialState) {
+  EXPECT_EQ(lock_screen_apps::ActionState::kNotSupported,
+            state_controller()->GetActionState(kTestAction));
+
+  ASSERT_EQ(0, observer().state_change_count());
+
+  state_controller()->MoveToBackground();
+
+  EXPECT_EQ(lock_screen_apps::ActionState::kNotSupported,
+            state_controller()->GetActionState(kTestAction));
+
+  ASSERT_EQ(0, observer().state_change_count());
+}