Home | History | Annotate | Download | only in cts 
      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package android.transition.cts;
     17 
     18 import static org.junit.Assert.assertEquals;
     19 import static org.junit.Assert.assertFalse;
     20 
     21 import android.graphics.Path;
     22 import android.graphics.PathMeasure;
     23 
     24 public abstract class PathMotionTest {
     25     public static void assertPathMatches(Path expectedPath, Path path) {
     26         PathMeasure expectedMeasure = new PathMeasure(expectedPath, false);
     27         PathMeasure pathMeasure = new PathMeasure(path, false);
     28 
     29         boolean expectedNextContour;
     30         boolean pathNextContour;
     31         int contourIndex = 0;
     32         do {
     33             float expectedLength = expectedMeasure.getLength();
     34             assertEquals("Lengths differ", expectedLength, pathMeasure.getLength(), 0.01f);
     35 
     36             float minLength = Math.min(expectedLength, pathMeasure.getLength());
     37 
     38             float[] pos = new float[2];
     39 
     40             float increment = minLength / 5f;
     41             for (float along = 0; along <= minLength; along += increment) {
     42                 expectedMeasure.getPosTan(along, pos, null);
     43                 float expectedX = pos[0];
     44                 float expectedY = pos[1];
     45 
     46                 pathMeasure.getPosTan(along, pos, null);
     47                 assertEquals("Failed at " + increment + " in contour " + contourIndex,
     48                         expectedX, pos[0], 0.01f);
     49                 assertEquals("Failed at " + increment + " in contour " + contourIndex,
     50                         expectedY, pos[1], 0.01f);
     51             }
     52             expectedNextContour = expectedMeasure.nextContour();
     53             pathNextContour = pathMeasure.nextContour();
     54             contourIndex++;
     55         } while (expectedNextContour && pathNextContour);
     56         assertFalse(expectedNextContour);
     57         assertFalse(pathNextContour);
     58     }
     59 }
     60