Font size in DomDistiller prefs syncs with local scaling

components/dom_distiller/core/distilled_page_prefs_unittests.cc

 // Copyright 2014 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 "components/dom_distiller/core/distilled_page_prefs.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "components/pref_registry/testing_pref_service_syncable.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace dom_distiller {
 
 namespace {
 
 class TestingObserver : public DistilledPagePrefs::Observer {
  public:
   TestingObserver()
       : font_(DistilledPagePrefs::SANS_SERIF),
-        theme_(DistilledPagePrefs::LIGHT) {}
+        theme_(DistilledPagePrefs::LIGHT),
+        scaling_(1.0f) {}
 
   void OnChangeFontFamily(DistilledPagePrefs::FontFamily new_font) override {
     font_ = new_font;
   }
 
   DistilledPagePrefs::FontFamily GetFontFamily() { return font_; }
 
   void OnChangeTheme(DistilledPagePrefs::Theme new_theme) override {
     theme_ = new_theme;
   }
 
   DistilledPagePrefs::Theme GetTheme() { return theme_; }
 
+  void OnChangeFontScaling(float new_scaling) override {
+    scaling_ = new_scaling;
+  }
+
+  float GetFontScaling() { return scaling_; }
+
  private:
   DistilledPagePrefs::FontFamily font_;
   DistilledPagePrefs::Theme theme_;
+  float scaling_;
 };
 
 }  // namespace
 
 class DistilledPagePrefsTest : public testing::Test {
  protected:
   void SetUp() override {
     pref_service_.reset(new user_prefs::TestingPrefServiceSyncable());
     DistilledPagePrefs::RegisterProfilePrefs(pref_service_->registry());
     distilled_page_prefs_.reset(new DistilledPagePrefs(pref_service_.get()));
   }
 
   scoped_ptr<user_prefs::TestingPrefServiceSyncable> pref_service_;
   scoped_ptr<DistilledPagePrefs> distilled_page_prefs_;
 
  private:
   base::MessageLoop message_loop_;
 };
 
 TEST_F(DistilledPagePrefsTest, TestingOnChangeFontIsBeingCalled) {
   TestingObserver obs;
   distilled_page_prefs_->AddObserver(&obs);
+
   distilled_page_prefs_->SetFontFamily(DistilledPagePrefs::MONOSPACE);
   EXPECT_EQ(DistilledPagePrefs::SANS_SERIF, obs.GetFontFamily());
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::MONOSPACE, obs.GetFontFamily());
+
   distilled_page_prefs_->SetFontFamily(DistilledPagePrefs::SERIF);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::SERIF, obs.GetFontFamily());
   distilled_page_prefs_->RemoveObserver(&obs);
 }
 
 TEST_F(DistilledPagePrefsTest, TestingMultipleObserversFont) {
   TestingObserver obs;
   distilled_page_prefs_->AddObserver(&obs);
   TestingObserver obs2;
   distilled_page_prefs_->AddObserver(&obs2);
+
   distilled_page_prefs_->SetFontFamily(DistilledPagePrefs::SERIF);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::SERIF, obs.GetFontFamily());
   EXPECT_EQ(DistilledPagePrefs::SERIF, obs2.GetFontFamily());
+
   distilled_page_prefs_->RemoveObserver(&obs);
+
   distilled_page_prefs_->SetFontFamily(DistilledPagePrefs::MONOSPACE);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::SERIF, obs.GetFontFamily());
   EXPECT_EQ(DistilledPagePrefs::MONOSPACE, obs2.GetFontFamily());
+
   distilled_page_prefs_->RemoveObserver(&obs2);
 }
 
 TEST_F(DistilledPagePrefsTest, TestingOnChangeThemeIsBeingCalled) {
   TestingObserver obs;
   distilled_page_prefs_->AddObserver(&obs);
+
   distilled_page_prefs_->SetTheme(DistilledPagePrefs::SEPIA);
   EXPECT_EQ(DistilledPagePrefs::LIGHT, obs.GetTheme());
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::SEPIA, obs.GetTheme());
+
   distilled_page_prefs_->SetTheme(DistilledPagePrefs::DARK);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::DARK, obs.GetTheme());
+
   distilled_page_prefs_->RemoveObserver(&obs);
 }
 
 TEST_F(DistilledPagePrefsTest, TestingMultipleObserversTheme) {
   TestingObserver obs;
   distilled_page_prefs_->AddObserver(&obs);
   TestingObserver obs2;
   distilled_page_prefs_->AddObserver(&obs2);
+
   distilled_page_prefs_->SetTheme(DistilledPagePrefs::SEPIA);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::SEPIA, obs.GetTheme());
   EXPECT_EQ(DistilledPagePrefs::SEPIA, obs2.GetTheme());
+
   distilled_page_prefs_->RemoveObserver(&obs);
+
   distilled_page_prefs_->SetTheme(DistilledPagePrefs::LIGHT);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(DistilledPagePrefs::SEPIA, obs.GetTheme());
   EXPECT_EQ(DistilledPagePrefs::LIGHT, obs2.GetTheme());
+
   distilled_page_prefs_->RemoveObserver(&obs2);
 }
 
+TEST_F(DistilledPagePrefsTest, TestingOnChangeFontScalingIsBeingCalled) {
+  TestingObserver obs;
+  distilled_page_prefs_->AddObserver(&obs);
+
+  distilled_page_prefs_->SetFontScaling(1.5f);
+  ASSERT_FLOAT_EQ(1.0f, obs.GetFontScaling());
+  base::RunLoop().RunUntilIdle();
+  ASSERT_FLOAT_EQ(1.5f, obs.GetFontScaling());
+
+  distilled_page_prefs_->SetFontScaling(0.7f);
+  base::RunLoop().RunUntilIdle();
+  ASSERT_FLOAT_EQ(0.7f, obs.GetFontScaling());
+
+  distilled_page_prefs_->RemoveObserver(&obs);
+}
+
+TEST_F(DistilledPagePrefsTest, TestingMultipleObserversFontScaling) {
+  TestingObserver obs;
+  distilled_page_prefs_->AddObserver(&obs);
+  TestingObserver obs2;
+  distilled_page_prefs_->AddObserver(&obs2);
+
+  distilled_page_prefs_->SetFontScaling(1.3f);
+  base::RunLoop().RunUntilIdle();
+  ASSERT_FLOAT_EQ(1.3f, obs.GetFontScaling());
+  ASSERT_FLOAT_EQ(1.3f, obs2.GetFontScaling());
+
+  distilled_page_prefs_->RemoveObserver(&obs);
+
+  distilled_page_prefs_->SetFontScaling(0.9f);
+  base::RunLoop().RunUntilIdle();
+  ASSERT_FLOAT_EQ(1.3f, obs.GetFontScaling());
+  ASSERT_FLOAT_EQ(0.9f, obs2.GetFontScaling());
+
+  distilled_page_prefs_->RemoveObserver(&obs2);
+}
+
 }  // namespace dom_distiller