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      1 /*
      2  * Copyright (C) 2009 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.gesture.cts;
     17 
     18 
     19 import android.gesture.GesturePoint;
     20 import android.gesture.GestureStroke;
     21 import android.gesture.OrientedBoundingBox;
     22 import android.graphics.Path;
     23 import android.graphics.RectF;
     24 
     25 import junit.framework.TestCase;
     26 
     27 /**
     28  * Simple compatibility unit tests for {@link GestureStroke}
     29  */
     30 public class GestureStrokeTest extends TestCase {
     31 
     32     private LineGestureStrokeHelper mHelper;
     33 
     34     @Override
     35     protected void setUp() throws Exception {
     36         mHelper = new LineGestureStrokeHelper();
     37     }
     38 
     39     /**
     40      * Test {@link GestureStroke#getPath()} when set of empty points are provided.
     41      */
     42     public void testGetPath_empty() {
     43         GestureStroke emptyStroke = mHelper.createGestureStroke();
     44         // null path currently returned
     45         assertNull(emptyStroke.getPath());
     46     }
     47 
     48     /**
     49      * Test {@link GestureStroke#getPath()} when a single point is provided.
     50      */
     51     public void testGetPath_singlePoint() {
     52         GestureStroke emptyStroke = mHelper.createGestureStroke(new GesturePoint(0, 0, 0));
     53         Path emptyPath = emptyStroke.getPath();
     54         // a single point is considered a tap and is not empty
     55         assertFalse(emptyPath.isEmpty());
     56     }
     57 
     58     /**
     59      * Test {@link GestureStroke#getPath()} when a line is provided.
     60      */
     61     public void testGetPath_line() {
     62         GestureStroke lineStroke = mHelper.createLineGesture();
     63         Path linePath = lineStroke.getPath();
     64         mHelper.assertLineBoundingBox(linePath);
     65     }
     66 
     67     /**
     68      * Test {@link android.gesture.GestureStroke#toPath(float, float, int)} returns expected results
     69      * for a single line, where the given toPath bounds exceeds the expected path.
     70      */
     71     public void testToPath_line() {
     72         // use the same
     73         GestureStroke lineStroke = mHelper.createLineGesture();
     74         // bound the path by the endpoint
     75         Path linePath = lineStroke.toPath(LineGestureStrokeHelper.LINE_END_POINT,
     76                 LineGestureStrokeHelper.LINE_END_POINT, 2);
     77 
     78         // expect the same results generated by getPath
     79         mHelper.assertLineBoundingBox(linePath);
     80     }
     81 
     82     /**
     83      * Test for {@link android.gesture.GestureStroke#toPath(float, float, int)}
     84      *
     85      * Verifies method returns expected results for a single line, where the given toPath bounds
     86      * truncates the expected path.
     87      */
     88     public void testToPath_boundedLine() {
     89         // use the same
     90         GestureStroke lineStroke = mHelper.createLineGesture();
     91         // bound the path by the midpoint
     92         Path linePath = lineStroke.toPath(LineGestureStrokeHelper.LINE_MIDWAY_POINT,
     93                 LineGestureStrokeHelper.LINE_MIDWAY_POINT, 2);
     94         RectF bounds = new RectF();
     95         linePath.computeBounds(bounds, true);
     96         // expect a square bounding box, starting at LINE_START_POINT and bounded by
     97         // LINE_QUARTER_POINT
     98         assertEquals(LineGestureStrokeHelper.LINE_QUARTER_POINT, bounds.bottom);
     99         assertEquals(LineGestureStrokeHelper.LINE_START_POINT, bounds.left);
    100         assertEquals(LineGestureStrokeHelper.LINE_QUARTER_POINT, bounds.right);
    101         assertEquals(LineGestureStrokeHelper.LINE_START_POINT, bounds.top);
    102     }
    103 
    104     /**
    105      * Test method for {@link android.gesture.GestureStroke#computeOrientedBoundingBox()}.
    106      *
    107      * Verifies method returns expected results for a single line.
    108      */
    109     public void testComputeOrientedBoundingBox() {
    110         GestureStroke line = mHelper.createLineGesture();
    111         OrientedBoundingBox box = line.computeOrientedBoundingBox();
    112         // expect a center of LINE_MIDWAY_POINT, LINE_MIDWAY_POINT, with a 45-degree orientation
    113         assertEquals(LineGestureStrokeHelper.LINE_MIDWAY_POINT, box.centerX);
    114         assertEquals(LineGestureStrokeHelper.LINE_MIDWAY_POINT, box.centerY);
    115         assertEquals(LineGestureStrokeHelper.LINE_ANGLE, box.orientation);
    116     }
    117 
    118     /**
    119      * Verifies that {@link android.gesture.GestureStroke#boundingBox} has expected values for
    120      * a simple straight line gesture
    121      */
    122     public void testBoundingBox_line() {
    123         GestureStroke line = mHelper.createLineGesture();
    124         mHelper.assertLineBoundingBox(line.boundingBox);
    125     }
    126 }
    127