1 /*
2  * Copyright (C) 2013 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 
17 package com.android.inputmethod.keyboard.internal;
18 
19 import static org.junit.Assert.assertEquals;
20 import static org.junit.Assert.assertTrue;
21 
22 import androidx.test.filters.SmallTest;
23 import androidx.test.runner.AndroidJUnit4;
24 
25 import com.android.inputmethod.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
26 
27 import org.junit.Test;
28 import org.junit.runner.RunWith;
29 
30 @SmallTest
31 @RunWith(AndroidJUnit4.class)
32 public class SmoothingUtilsTests {
33     // "run tests" -c com.android.inputmethod.keyboard.internal.SmoothingUtilsTests
34     private static final boolean DEBUG = false;
35 
36     @Test
testGet3DParamaters()37     public void testGet3DParamaters() {
38         final float[] xs = new float[] {0, 1, 2, 3, 4};
39         final float[] ys = new float[] {1, 4, 15, 40, 85}; // y = x^3 + x^2 + x + 1
40         final float[][] retval = new float[4][1];
41         try {
42             SmoothingUtils.get3DParameters(xs, ys, retval);
43             if (DEBUG) {
44                 MatrixUtils.dump("3d", retval);
45             }
46             for (int i = 0; i < 4; ++i) {
47                 assertEquals(retval[i][0], 1.0f, 0.001f);
48             }
49         } catch (MatrixOperationFailedException e) {
50             assertTrue(false);
51         }
52     }
53 }
54