1 // Copyright 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "cc/animation/timing_function.h" 6 7 #include "testing/gtest/include/gtest/gtest.h" 8 9 namespace cc { 10 namespace { 11 12 TEST(TimingFunctionTest, CubicBezierTimingFunction) { 13 scoped_ptr<CubicBezierTimingFunction> function = 14 CubicBezierTimingFunction::Create(0.25, 0.0, 0.75, 1.0); 15 16 double epsilon = 0.00015; 17 18 EXPECT_NEAR(function->GetValue(0), 0, epsilon); 19 EXPECT_NEAR(function->GetValue(0.05), 0.01136, epsilon); 20 EXPECT_NEAR(function->GetValue(0.1), 0.03978, epsilon); 21 EXPECT_NEAR(function->GetValue(0.15), 0.079780, epsilon); 22 EXPECT_NEAR(function->GetValue(0.2), 0.12803, epsilon); 23 EXPECT_NEAR(function->GetValue(0.25), 0.18235, epsilon); 24 EXPECT_NEAR(function->GetValue(0.3), 0.24115, epsilon); 25 EXPECT_NEAR(function->GetValue(0.35), 0.30323, epsilon); 26 EXPECT_NEAR(function->GetValue(0.4), 0.36761, epsilon); 27 EXPECT_NEAR(function->GetValue(0.45), 0.43345, epsilon); 28 EXPECT_NEAR(function->GetValue(0.5), 0.5, epsilon); 29 EXPECT_NEAR(function->GetValue(0.6), 0.63238, epsilon); 30 EXPECT_NEAR(function->GetValue(0.65), 0.69676, epsilon); 31 EXPECT_NEAR(function->GetValue(0.7), 0.75884, epsilon); 32 EXPECT_NEAR(function->GetValue(0.75), 0.81764, epsilon); 33 EXPECT_NEAR(function->GetValue(0.8), 0.87196, epsilon); 34 EXPECT_NEAR(function->GetValue(0.85), 0.92021, epsilon); 35 EXPECT_NEAR(function->GetValue(0.9), 0.96021, epsilon); 36 EXPECT_NEAR(function->GetValue(0.95), 0.98863, epsilon); 37 EXPECT_NEAR(function->GetValue(1), 1, epsilon); 38 } 39 40 // Tests that the bezier timing function works with knots with y not in (0, 1). 41 TEST(TimingFunctionTest, CubicBezierTimingFunctionUnclampedYValues) { 42 scoped_ptr<CubicBezierTimingFunction> function = 43 CubicBezierTimingFunction::Create(0.5, -1.0, 0.5, 2.0); 44 45 double epsilon = 0.00015; 46 47 EXPECT_NEAR(function->GetValue(0.0), 0.0, epsilon); 48 EXPECT_NEAR(function->GetValue(0.05), -0.08954, epsilon); 49 EXPECT_NEAR(function->GetValue(0.1), -0.15613, epsilon); 50 EXPECT_NEAR(function->GetValue(0.15), -0.19641, epsilon); 51 EXPECT_NEAR(function->GetValue(0.2), -0.20651, epsilon); 52 EXPECT_NEAR(function->GetValue(0.25), -0.18232, epsilon); 53 EXPECT_NEAR(function->GetValue(0.3), -0.11992, epsilon); 54 EXPECT_NEAR(function->GetValue(0.35), -0.01672, epsilon); 55 EXPECT_NEAR(function->GetValue(0.4), 0.12660, epsilon); 56 EXPECT_NEAR(function->GetValue(0.45), 0.30349, epsilon); 57 EXPECT_NEAR(function->GetValue(0.5), 0.50000, epsilon); 58 EXPECT_NEAR(function->GetValue(0.55), 0.69651, epsilon); 59 EXPECT_NEAR(function->GetValue(0.6), 0.87340, epsilon); 60 EXPECT_NEAR(function->GetValue(0.65), 1.01672, epsilon); 61 EXPECT_NEAR(function->GetValue(0.7), 1.11992, epsilon); 62 EXPECT_NEAR(function->GetValue(0.75), 1.18232, epsilon); 63 EXPECT_NEAR(function->GetValue(0.8), 1.20651, epsilon); 64 EXPECT_NEAR(function->GetValue(0.85), 1.19641, epsilon); 65 EXPECT_NEAR(function->GetValue(0.9), 1.15613, epsilon); 66 EXPECT_NEAR(function->GetValue(0.95), 1.08954, epsilon); 67 EXPECT_NEAR(function->GetValue(1.0), 1.0, epsilon); 68 } 69 70 } // namespace 71 } // namespace cc 72
