Upstream accessibility font size preferences.

chrome/android/javatests/src/org/chromium/chrome/browser/accessibility/FontSizePrefsTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/accessibility/FontSizePrefsTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/accessibility/FontSizePrefsTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/accessibility/FontSizePrefsTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..ccd1a264491c21fbe0e291afaab7c878b65f927e
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/accessibility/FontSizePrefsTest.java
@@ -0,0 +1,161 @@
+// 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.
+
+package org.chromium.chrome.browser.accessibility;
+
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.test.util.Feature;
+import org.chromium.base.ThreadUtils;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.shell.ChromeShellTestBase;
+import org.chromium.content.browser.test.util.UiUtils;
+
+/**
+ * Test class for {@link FontSizePrefs}.
+ */
+public class FontSizePrefsTest extends ChromeShellTestBase {
+
+    private FontSizePrefs mFontSizePrefs;
+
+    private static final float FONT_SMALLER_THAN_THRESHOLD =
+            FontSizePrefs.FORCE_ENABLE_ZOOM_THRESHOLD_MULTIPLIER - 0.4f;
+    private static final float FONT_LARGER_THAN_THRESHOLD =
+            FontSizePrefs.FORCE_ENABLE_ZOOM_THRESHOLD_MULTIPLIER + 0.4f;
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        startChromeBrowserProcessSync(getInstrumentation().getTargetContext());
+        mFontSizePrefs = FontSizePrefs.getForProfile(Profile.getLastUsedProfile(),
+                launchChromeShellWithBlankPage().getApplicationContext());
+    }
+
+    @SmallTest
+    @Feature({"Accessibility"})
+    public void testGetAndSetFontAndForceEnableZoom() throws InterruptedException {
+        // Check default font.
+        assertEquals(1f, mFontSizePrefs.getFontScaleFactor());
+
+        // Check the default value of force enable zoom.
+        assertEquals(false, mFontSizePrefs.getForceEnableZoom());
+        setForceEnableZoom(true);
+        assertEquals(true, mFontSizePrefs.getForceEnableZoom());
+
+        // Set force enable zoom false again to ensure that when font is now changed but remains
+        // below the threshold, force enable zoom remains false.
+        setForceEnableZoom(false);
+        // Check that font size can be correctly set and force enable zoom does
+        // not change when font size is not increased above the threshold.
+        setFontScale(FONT_SMALLER_THAN_THRESHOLD);
+        UiUtils.settleDownUI(getInstrumentation());
+        assertEquals(FONT_SMALLER_THAN_THRESHOLD, mFontSizePrefs.getFontScaleFactor());
+        assertEquals(false, mFontSizePrefs.getForceEnableZoom());
+
+        // Check that force enable zoom does change when font increased above
+        // threshold, since user has not checked the set enable zoom.
+        setFontScale(FONT_LARGER_THAN_THRESHOLD);
+        UiUtils.settleDownUI(getInstrumentation());
+        assertEquals(FONT_LARGER_THAN_THRESHOLD, mFontSizePrefs.getFontScaleFactor());
+        assertEquals(true, mFontSizePrefs.getForceEnableZoom());
+    }
+
+    @SmallTest
+    @Feature({"Accessibility"})
+    public void testObserversForceEnableZoom() throws InterruptedException {
+        TestingObserver test1 = new TestingObserver();
+        TestingObserver test2 = new TestingObserver();
+        mFontSizePrefs.addObserver(test1);
+        mFontSizePrefs.addObserver(test2);
+
+        // Checks that force enable zoom for both observers is correctly changed.
+        setForceEnableZoom(true);
+        UiUtils.settleDownUI(getInstrumentation());
+        assertEquals(true, test1.getForceEnableZoom());
+        assertEquals(true, test2.getForceEnableZoom());
+
+        //Checks that removing observer and setting force enable zoom works.
+        mFontSizePrefs.removeObserver(test1);
+        setForceEnableZoom(false);
+        UiUtils.settleDownUI(getInstrumentation());
+        assertEquals(true, test1.getForceEnableZoom());
+        assertEquals(false, test2.getForceEnableZoom());
+        mFontSizePrefs.removeObserver(test2);
+    }
+
+
+    @SmallTest
+    @Feature({"Accessibility"})
+    public void testObserversFontScale() throws InterruptedException {
+        TestingObserver test1 = new TestingObserver();
+        TestingObserver test2 = new TestingObserver();
+        mFontSizePrefs.addObserver(test1);
+        mFontSizePrefs.addObserver(test2);
+
+        // Checks that font scale for both observers is correctly changed.
+        setFontScale(FONT_SMALLER_THAN_THRESHOLD);
+        UiUtils.settleDownUI(getInstrumentation());
+        assertEquals(FONT_SMALLER_THAN_THRESHOLD, test1.getFontScaleFactor());
+        assertEquals(FONT_SMALLER_THAN_THRESHOLD, test2.getFontScaleFactor());
+
+        //Checks that font scale for both observers is correctly changed and when the font scale is
+        // increased above the threshold, force enable zoom also changes correspondingly.
+        setFontScale(FONT_LARGER_THAN_THRESHOLD);
+        UiUtils.settleDownUI(getInstrumentation());
+        assertEquals(FONT_LARGER_THAN_THRESHOLD, test1.getFontScaleFactor());
+        assertEquals(FONT_LARGER_THAN_THRESHOLD, test2.getFontScaleFactor());
+        assertEquals(true, test1.getForceEnableZoom());
+        assertEquals(true, test2.getForceEnableZoom());
+
+        //Checks that removing observer and setting font works.
+        mFontSizePrefs.removeObserver(test1);
+        setFontScale(FONT_SMALLER_THAN_THRESHOLD);
+        UiUtils.settleDownUI(getInstrumentation());
+        assertEquals(FONT_LARGER_THAN_THRESHOLD, test1.getFontScaleFactor());
+        assertEquals(FONT_SMALLER_THAN_THRESHOLD, test2.getFontScaleFactor());
+        mFontSizePrefs.removeObserver(test2);
+    }
+
+    private static class TestingObserver implements FontSizePrefs.Observer {
+      private float mFontSize;
+      private boolean mForceEnableZoom;
+
+        public TestingObserver() {
+            mFontSize = 1;
+            mForceEnableZoom = false;
+        }
+
+        public float getFontScaleFactor() {
+            return mFontSize;
+        }
+
+        public void onChangeFontSize(float font) {
+            mFontSize = font;
+        }
+
+        public boolean getForceEnableZoom() {
+            return mForceEnableZoom;
+        }
+
+        public void onChangeForceEnableZoom(boolean enabled) {
+            mForceEnableZoom = enabled;
+        }
+    }
+
+    private void setFontScale(final float fontsize) {
+      ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+        public void run() {
+          mFontSizePrefs.setFontScaleFactor(fontsize);
+        }
+      });
+    }
+
+    private void setForceEnableZoom(final boolean enabled) {
+      ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+        public void run() {
+          mFontSizePrefs.setForceEnableZoom(enabled);
+        }
+      });
+    }
+}