| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view.animation.cts; |
| |
| import android.app.Activity; |
| import android.test.ActivityInstrumentationTestCase2; |
| import android.view.View; |
| import android.view.animation.AlphaAnimation; |
| import android.view.animation.Animation; |
| import android.view.animation.AnimationUtils; |
| import android.view.animation.Interpolator; |
| import android.view.animation.LinearInterpolator; |
| import android.view.animation.Transformation; |
| |
| import com.android.cts.stub.R; |
| |
| |
| /** |
| * Test {@link LinearInterpolator}. |
| */ |
| public class LinearInterpolatorTest extends ActivityInstrumentationTestCase2<AnimationTestStubActivity> { |
| |
| private Activity mActivity; |
| private static final float ALPHA_DELTA = 0.001f; |
| |
| /** It is defined in R.anim.alpha */ |
| private static final long LINEAR_ALPHA_DURATION = 500; |
| private static final long LINEAR_ALPHA_TIME_STEP = LINEAR_ALPHA_DURATION / 5; |
| |
| public LinearInterpolatorTest() { |
| super("com.android.cts.stub", AnimationTestStubActivity.class); |
| } |
| |
| @Override |
| protected void setUp() throws Exception { |
| super.setUp(); |
| mActivity = getActivity(); |
| } |
| |
| public void testConstructor() { |
| new LinearInterpolator(); |
| new LinearInterpolator(mActivity, null); |
| } |
| |
| public void testGetInterpolation() { |
| LinearInterpolator interpolator = new LinearInterpolator(); |
| final float delta1 = interpolator.getInterpolation(0.1f) |
| - interpolator.getInterpolation(0.0f); |
| final float delta2 = interpolator.getInterpolation(0.2f) |
| - interpolator.getInterpolation(0.1f); |
| final float delta3 = interpolator.getInterpolation(0.3f) |
| - interpolator.getInterpolation(0.2f); |
| assertEquals(delta1, delta2, ALPHA_DELTA); |
| assertEquals(delta2, delta3, ALPHA_DELTA); |
| } |
| |
| public void testLinearInterpolator() { |
| final View animWindow = mActivity.findViewById(R.id.anim_window); |
| final Animation anim = AnimationUtils.loadAnimation(mActivity, R.anim.alpha); |
| assertEquals(LINEAR_ALPHA_DURATION, anim.getDuration()); |
| assertTrue(anim instanceof AlphaAnimation); |
| |
| Interpolator interpolator = new LinearInterpolator(); |
| anim.setInterpolator(interpolator); |
| assertFalse(anim.hasStarted()); |
| |
| AnimationTestUtils.assertRunAnimation(getInstrumentation(), animWindow, anim); |
| |
| Transformation transformation = new Transformation(); |
| final long startTime = anim.getStartTime(); |
| anim.getTransformation(startTime, transformation); |
| final float alpha1 = transformation.getAlpha(); |
| assertEquals(0.0f, alpha1, ALPHA_DELTA); |
| |
| anim.getTransformation(startTime + LINEAR_ALPHA_TIME_STEP, transformation); |
| final float alpha2 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + LINEAR_ALPHA_TIME_STEP * 2, transformation); |
| final float alpha3 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + LINEAR_ALPHA_TIME_STEP * 3, transformation); |
| final float alpha4 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + LINEAR_ALPHA_TIME_STEP * 4, transformation); |
| final float alpha5 = transformation.getAlpha(); |
| |
| anim.getTransformation(startTime + LINEAR_ALPHA_DURATION, transformation); |
| final float alpha6 = transformation.getAlpha(); |
| assertEquals(1.0f, alpha6, ALPHA_DELTA); |
| |
| final float delta1 = alpha2 - alpha1; |
| final float delta2 = alpha3 - alpha2; |
| final float delta3 = alpha4 - alpha3; |
| final float delta4 = alpha5 - alpha4; |
| final float delta5 = alpha6 - alpha5; |
| assertEquals(delta1, delta2, ALPHA_DELTA); |
| assertEquals(delta2, delta3, ALPHA_DELTA); |
| assertEquals(delta3, delta4, ALPHA_DELTA); |
| assertEquals(delta4, delta5, ALPHA_DELTA); |
| } |
| } |