src/android/tests/src/com/google/android/inputmethod/japanese/view/DrawableCacheTest.java

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package org.mozc.android.inputmethod.japanese.view;

import static org.easymock.EasyMock.expect;

import org.mozc.android.inputmethod.japanese.testing.InstrumentationTestCaseWithMock;

import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.test.mock.MockResources;
import android.test.suitebuilder.annotation.SmallTest;

/**
 */
public class DrawableCacheTest extends InstrumentationTestCaseWithMock {

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    Skin.getFallbackInstance().resetDrawableFactory();
    for (SkinType skinType : SkinType.values()) {
      skinType.getSkin(
          getInstrumentation().getTargetContext().getResources()).resetDrawableFactory();
    }
 }

  @SmallTest
  public void testDrawableCache() {
    Resources resources = createMock(MockResources.class);
    DrawableCache drawableCache = new DrawableCache(resources);
    drawableCache.setSkin(Skin.getFallbackInstance());

    // For invalid resource id (0), getDrawable returns {@code Optional.<Drawable>absent()} without
    // looking up resources.
    replayAll();

    assertFalse(drawableCache.getDrawable(0).isPresent());

    verifyAll();

    // For first getDrawable, it loads from resources instance.
    Drawable drawable = new ColorDrawable(Color.BLACK);
    resetAll();
    expect(resources.getResourceTypeName(1)).andReturn("drawable");
    expect(resources.getDrawable(1)).andReturn(drawable);
    replayAll();

    assertSame(drawable, drawableCache.getDrawable(1).get());

    verifyAll();

    // For second getDrawable (or later), it returns cached instance.
    resetAll();
    replayAll();

    assertSame(drawable, drawableCache.getDrawable(1).get());

    verifyAll();

    // Once clear is invoked, the drawable will be loaded from resources again.
    drawableCache.clear();
    resetAll();
    expect(resources.getResourceTypeName(1)).andReturn("drawable");
    expect(resources.getDrawable(1)).andReturn(drawable);
    replayAll();

    assertSame(drawable, drawableCache.getDrawable(1).get());

    verifyAll();
  }

  @SmallTest
  public void testSetSkinType() {
    Resources resources = createMock(MockResources.class);
    DrawableCache drawableCache = new DrawableCache(resources);
    drawableCache.setSkin(SkinType.ORANGE_LIGHTGRAY.getSkin(resources));
    Drawable drawable = new ColorDrawable(Color.BLACK);
    expect(resources.getResourceTypeName(1)).andReturn("drawable");
    expect(resources.getDrawable(1)).andReturn(drawable);
    replayAll();

    assertSame(drawable, drawableCache.getDrawable(1).get());

    verifyAll();

    // If setSkinType is invoked but actually the skin is not changed,
    // cached drawables should be alive.
    resetAll();
    replayAll();

    drawableCache.setSkin(SkinType.ORANGE_LIGHTGRAY.getSkin(resources));
    assertSame(drawable, drawableCache.getDrawable(1).get());

    verifyAll();

    // If setSkinType is invoked and actually the skin is changed,
    // cached drawables should be invalidated.
    resetAll();
    expect(resources.getResourceTypeName(1)).andReturn("drawable");
    expect(resources.getDrawable(1)).andReturn(drawable);
    replayAll();

    drawableCache.setSkin(SkinType.TEST.getSkin(resources));
    assertSame(drawable, drawableCache.getDrawable(1).get());

    verifyAll();
  }
}