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      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 
     17 #include <gtest/gtest.h>
     18 
     19 #include <Interpolator.h>
     20 
     21 namespace android {
     22 namespace uirenderer {
     23 
     24 struct TestData {
     25     const std::vector<float> x;
     26     const std::vector<float> y;
     27     const std::vector<float> inFraction;
     28     const std::vector<float> outFraction;
     29 };
     30 
     31 const static TestData sTestDataSet[] = {
     32         {
     33                 // Straight line as a path.
     34                 {0.0f, 1.0f},
     35                 {0.0f, 1.0f},
     36                 {0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f},
     37                 {0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f},
     38         },
     39 
     40         {
     41                 {
     42                         0.0f, 0.5f, 0.5178955f, 0.5341797f, 0.5489991f, 0.5625f, 0.5748291f,
     43                         0.5861328f, 0.60625005f, 0.62402344f, 0.640625f, 0.675f, 0.6951172f,
     44                         0.71875f, 0.7470703f, 0.78125f, 0.82246095f, 0.84606934f, 0.871875f,
     45                         0.9000244f, 0.93066406f, 0.96394044f, 1.0f
     46                 },
     47                 {
     48                         0.0f, 0.0f, 0.0028686523f, 0.011230469f, 0.024719238f, 0.04296875f,
     49                         0.06561279f, 0.092285156f, 0.15625f, 0.2319336f, 0.31640625f, 0.5f,
     50                         0.5932617f, 0.68359375f, 0.7680664f, 0.84375f, 0.90771484f, 0.9343872f,
     51                         0.95703125f, 0.97528076f, 0.98876953f, 0.99713135f, 1.0f
     52                 },
     53                 {
     54                         0.0f, 0.03375840187072754f, 0.13503384590148926f, 0.23630905151367188f,
     55                         0.336834192276001f, 0.4508626461029053f, 0.564141035079956f,
     56                         0.6781694889068604f, 0.7921979427337646f, 0.9054763317108154f, 1.0f
     57                 },
     58                 {
     59                         0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0459827296435833f,
     60                         0.5146934390068054f, 0.8607426285743713f, 0.9776809215545654f, 1.0f
     61 
     62                 }
     63 
     64         },
     65         {
     66                 {
     67                         0.0f, 0.017895509f, 0.034179688f, 0.048999026f, 0.0625f, 0.0748291f,
     68                         0.08613282f, 0.10625f, 0.12402344f, 0.140625f, 0.17500001f, 0.19511719f,
     69                         0.21875f, 0.24707031f, 0.28125f, 0.32246095f, 0.34606934f, 0.371875f,
     70                         0.4000244f, 0.43066406f, 0.46394044f, 0.5f, 1.0f
     71                 },
     72                 {
     73                         0.0f, 0.0028686523f, 0.011230469f, 0.024719238f, 0.04296875f, 0.06561279f,
     74                         0.092285156f, 0.15625f, 0.2319336f, 0.31640625f, 0.5f, 0.5932617f,
     75                         0.68359375f, 0.7680664f, 0.84375f, 0.90771484f, 0.9343872f, 0.95703125f,
     76                         0.97528076f, 0.98876953f, 0.99713135f, 1.0f, 1.0f
     77                 },
     78                 {
     79                         0.0f, 0.102020263671875f, 0.20330810546875f, 0.3165740966796875f,
     80                         0.43060302734375f, 0.5318756103515625f, 0.6331634521484375f,
     81                         0.746429443359375f, 0.84771728515625f, 0.9617462158203125f, 1.0f
     82                 },
     83                 {
     84                         0.0f, 0.14280107617378235f, 0.6245699524879456f, 0.8985776901245117f,
     85                         0.9887426495552063f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f
     86                 }
     87         },
     88 
     89 
     90 };
     91 
     92 static std::vector<float> getX(const TestData& data) {
     93     return data.x;
     94 }
     95 
     96 static std::vector<float> getY(const TestData& data) {
     97     return data.y;
     98 }
     99 
    100 TEST(Interpolator, pathInterpolation) {
    101     for (const TestData& data: sTestDataSet) {
    102         PathInterpolator interpolator(getX(data), getY(data));
    103         for (size_t i = 0; i < data.inFraction.size(); i++) {
    104             EXPECT_FLOAT_EQ(data.outFraction[i], interpolator.interpolate(data.inFraction[i]));
    105         }
    106     }
    107 }
    108 
    109 }
    110 }
    111