Upstream accessibility font size preferences.

chrome/browser/accessibility/font_size_prefs_unittest.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 "chrome/browser/accessibility/font_size_prefs.h"
+
+#include "chrome/test/base/testing_profile.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class FontSizePrefsTest : public testing::Test {
+ protected:
+  virtual void SetUp() OVERRIDE {
+    profile_.reset(new TestingProfile());
+    font_size_prefs_.reset(new FontSizePrefs(profile_.get()));
+  }
+  scoped_ptr<TestingProfile> profile_;
+  scoped_ptr<FontSizePrefs> font_size_prefs_;
+};
+
+class TestingObserver : public FontSizePrefs::Observer {
+ public:
+  TestingObserver() : font_scale_factor_(1), force_enable_zoom_(false) {}
+
+  virtual void OnChangeFontSize(float font) OVERRIDE {
+    font_scale_factor_ = font;
+  }
+
+  virtual void OnChangeForceEnableZoom(bool enabled) OVERRIDE {
+    force_enable_zoom_ = enabled;
+  }
+
+  float GetFontScaleFactor() { return font_scale_factor_; }
+  bool GetForceEnableZoom() { return force_enable_zoom_; }
+
+ private:
+  float font_scale_factor_;
+  bool force_enable_zoom_;
+};
+
+TEST_F(FontSizePrefsTest, TestingSetFontSizeSingleObserver) {
+  TestingObserver obs;
+  font_size_prefs_->AddObserver(&obs);
+  EXPECT_EQ(1, obs.GetFontScaleFactor());
+
+  font_size_prefs_->SetFontScaleFactor(1.2f);
+  EXPECT_EQ(1.2f, obs.GetFontScaleFactor());
+  EXPECT_EQ(1.2f, font_size_prefs_->GetFontScaleFactor());
+
+  font_size_prefs_->RemoveObserver(&obs);
+}
+
+TEST_F(FontSizePrefsTest, TestingSetForceEnableZoomSingleObserver) {
+  TestingObserver obs;
+  font_size_prefs_->AddObserver(&obs);
+  EXPECT_EQ(false, obs.GetForceEnableZoom());
+
+  font_size_prefs_->SetForceEnableZoom(true);
+  EXPECT_EQ(true, font_size_prefs_->GetForceEnableZoom());
+  EXPECT_EQ(true, obs.GetForceEnableZoom());
+
+  font_size_prefs_->RemoveObserver(&obs);
+}
+
+TEST_F(FontSizePrefsTest, TestingMultipleObserversFontSize) {
+  TestingObserver obs1;
+  font_size_prefs_->AddObserver(&obs1);
+  TestingObserver obs2;
+  font_size_prefs_->AddObserver(&obs2);
+
+  font_size_prefs_->SetFontScaleFactor(1.2f);
+  EXPECT_EQ(1.2f, obs1.GetFontScaleFactor());
+  EXPECT_EQ(1.2f, obs2.GetFontScaleFactor());
+
+  font_size_prefs_->RemoveObserver(&obs1);
+  font_size_prefs_->SetFontScaleFactor(1.4f);
+  EXPECT_EQ(1.2f, obs1.GetFontScaleFactor());
+  EXPECT_EQ(1.4f, obs2.GetFontScaleFactor());
+
+  font_size_prefs_->RemoveObserver(&obs2);
+}
+
+TEST_F(FontSizePrefsTest, TestingMultipleObserversForceEnableZoom) {
+  TestingObserver obs1;
+  font_size_prefs_->AddObserver(&obs1);
+  TestingObserver obs2;
+  font_size_prefs_->AddObserver(&obs2);
+
+  font_size_prefs_->SetForceEnableZoom(true);
+  EXPECT_EQ(true, obs1.GetForceEnableZoom());
+  EXPECT_EQ(true, obs2.GetForceEnableZoom());
+
+  font_size_prefs_->RemoveObserver(&obs1);
+  font_size_prefs_->SetForceEnableZoom(false);
+  EXPECT_EQ(true, obs1.GetForceEnableZoom());
+  EXPECT_EQ(false, obs2.GetForceEnableZoom());
+
+  font_size_prefs_->RemoveObserver(&obs2);
+}