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/*
* Copyright (C) 2011 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 com.android.chimpchat.adb;
import com.google.common.collect.Lists;
import com.android.chimpchat.adb.LinearInterpolator.Point;
import junit.framework.TestCase;
import java.util.List;
/**
* Unit tests for the LinerInterpolator class.S
*/
public class LinearInterpolatorTest extends TestCase {
private static class Collector implements LinearInterpolator.Callback {
private final List<LinearInterpolator.Point> points = Lists.newArrayList();
public List<LinearInterpolator.Point> getPoints() {
return points;
}
public void end(Point input) {
points.add(input);
}
public void start(Point input) {
points.add(input);
}
public void step(Point input) {
points.add(input);
}
}
List<Integer> STEP_POINTS = Lists.newArrayList(0, 100, 200, 300, 400, 500, 600, 700, 800, 900,
1000);
List<Integer> REVERSE_STEP_POINTS = Lists.newArrayList(1000, 900, 800, 700, 600, 500, 400, 300,
200, 100, 0);
public void testLerpRight() {
LinearInterpolator lerp = new LinearInterpolator(10);
Collector collector = new Collector();
lerp.interpolate(new LinearInterpolator.Point(0, 100),
new LinearInterpolator.Point(1000, 100),
collector);
List<LinearInterpolator.Point> points = collector.getPoints();
assertEquals(11, points.size());
for (int x = 0; x < points.size(); x++) {
assertEquals(new Point(STEP_POINTS.get(x), 100), points.get(x));
}
}
public void testLerpLeft() {
LinearInterpolator lerp = new LinearInterpolator(10);
Collector collector = new Collector();
lerp.interpolate(new LinearInterpolator.Point(1000, 100),
new LinearInterpolator.Point(0, 100),
collector);
List<LinearInterpolator.Point> points = collector.getPoints();
assertEquals(11, points.size());
for (int x = 0; x < points.size(); x++) {
assertEquals(new Point(REVERSE_STEP_POINTS.get(x), 100), points.get(x));
}
}
public void testLerpUp() {
LinearInterpolator lerp = new LinearInterpolator(10);
Collector collector = new Collector();
lerp.interpolate(new LinearInterpolator.Point(100, 1000),
new LinearInterpolator.Point(100, 0),
collector);
List<LinearInterpolator.Point> points = collector.getPoints();
assertEquals(11, points.size());
for (int x = 0; x < points.size(); x++) {
assertEquals(new Point(100, REVERSE_STEP_POINTS.get(x)), points.get(x));
}
}
public void testLerpDown() {
LinearInterpolator lerp = new LinearInterpolator(10);
Collector collector = new Collector();
lerp.interpolate(new LinearInterpolator.Point(100, 0),
new LinearInterpolator.Point(100, 1000),
collector);
List<LinearInterpolator.Point> points = collector.getPoints();
assertEquals(11, points.size());
for (int x = 0; x < points.size(); x++) {
assertEquals(new Point(100, STEP_POINTS.get(x)), points.get(x));
}
}
public void testLerpNW() {
LinearInterpolator lerp = new LinearInterpolator(10);
Collector collector = new Collector();
lerp.interpolate(new LinearInterpolator.Point(0, 0),
new LinearInterpolator.Point(1000, 1000),
collector);
List<LinearInterpolator.Point> points = collector.getPoints();
assertEquals(11, points.size());
for (int x = 0; x < points.size(); x++) {
assertEquals(new Point(STEP_POINTS.get(x), STEP_POINTS.get(x)), points.get(x));
}
}
public void testLerpNE() {
LinearInterpolator lerp = new LinearInterpolator(10);
Collector collector = new Collector();
lerp.interpolate(new LinearInterpolator.Point(1000, 1000),
new LinearInterpolator.Point(0, 0),
collector);
List<LinearInterpolator.Point> points = collector.getPoints();
assertEquals(11, points.size());
for (int x = 0; x < points.size(); x++) {
assertEquals(new Point(REVERSE_STEP_POINTS.get(x), REVERSE_STEP_POINTS.get(x)), points.get(x));
}
}
}
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