| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/platform/geometry/float_point.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "third_party/blink/renderer/platform/geometry/geometry_test_helpers.h" |
| |
| namespace blink { |
| |
| TEST(FloatPointTest, LengthTest) { |
| // Sanity check the Pythagorean triples 3-4-5 and 5-12-13 |
| FloatPoint p1 = FloatPoint(3.f, 4.f); |
| EXPECT_PRED_FORMAT2(geometry_test::AssertAlmostEqual, p1.length(), 5.f); |
| FloatPoint p2 = FloatPoint(5.f, 12.f); |
| EXPECT_PRED_FORMAT2(geometry_test::AssertAlmostEqual, p2.length(), 13.f); |
| |
| // Test very small numbers. This fails under the old implementation of |
| // FloatPoint::length(): `return sqrtf(lengthSquared());' |
| FloatPoint p3 = FloatPoint(.5e-20f, .5e-20f); |
| EXPECT_PRED_FORMAT2(geometry_test::AssertAlmostEqual, p3.length(), |
| .707106781186548e-20f); |
| |
| // Test very large numbers. |
| FloatPoint p4 = FloatPoint(.5e20f, .5e20f); |
| EXPECT_PRED_FORMAT2(geometry_test::AssertAlmostEqual, p4.length(), |
| .707106781186548e20f); |
| } |
| |
| } // namespace blink |
