1 files changed, 67 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/transforms/rotation_test.cc b/chromium/third_party/blink/renderer/platform/transforms/rotation_test.cc
new file mode 100644
index 00000000000..87ebd020144
--- /dev/null
+++ b/chromium/third_party/blink/renderer/platform/transforms/rotation_test.cc
@@ -0,0 +1,67 @@
+// Copyright 2016 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/transforms/rotation.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+TEST(RotationTest, GetCommonAxisTest) {
+  FloatPoint3D axis;
+  double angle_a;
+  double angle_b;
+
+  EXPECT_TRUE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(0, 0, 0), 0),
+                                      Rotation(FloatPoint3D(1, 2, 3), 100),
+                                      axis, angle_a, angle_b));
+  EXPECT_EQ(FloatPoint3D(1, 2, 3), axis);
+  EXPECT_EQ(0, angle_a);
+  EXPECT_EQ(100, angle_b);
+
+  EXPECT_TRUE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(1, 2, 3), 100),
+                                      Rotation(FloatPoint3D(0, 0, 0), 0), axis,
+                                      angle_a, angle_b));
+  EXPECT_EQ(FloatPoint3D(1, 2, 3), axis);
+  EXPECT_EQ(100, angle_a);
+  EXPECT_EQ(0, angle_b);
+
+  EXPECT_TRUE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(0, 0, 0), 100),
+                                      Rotation(FloatPoint3D(1, 2, 3), 100),
+                                      axis, angle_a, angle_b));
+  EXPECT_EQ(FloatPoint3D(1, 2, 3), axis);
+  EXPECT_EQ(0, angle_a);
+  EXPECT_EQ(100, angle_b);
+
+  EXPECT_TRUE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(3, 2, 1), 0),
+                                      Rotation(FloatPoint3D(1, 2, 3), 100),
+                                      axis, angle_a, angle_b));
+  EXPECT_EQ(FloatPoint3D(1, 2, 3), axis);
+  EXPECT_EQ(0, angle_a);
+  EXPECT_EQ(100, angle_b);
+
+  EXPECT_TRUE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(1, 2, 3), 50),
+                                      Rotation(FloatPoint3D(1, 2, 3), 100),
+                                      axis, angle_a, angle_b));
+  EXPECT_EQ(FloatPoint3D(1, 2, 3), axis);
+  EXPECT_EQ(50, angle_a);
+  EXPECT_EQ(100, angle_b);
+
+  EXPECT_TRUE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(1, 2, 3), 50),
+                                      Rotation(FloatPoint3D(2, 4, 6), 100),
+                                      axis, angle_a, angle_b));
+  EXPECT_EQ(FloatPoint3D(1, 2, 3), axis);
+  EXPECT_EQ(50, angle_a);
+  EXPECT_EQ(100, angle_b);
+
+  EXPECT_FALSE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(1, 2, 3), 50),
+                                       Rotation(FloatPoint3D(3, 2, 1), 100),
+                                       axis, angle_a, angle_b));
+
+  EXPECT_FALSE(Rotation::GetCommonAxis(Rotation(FloatPoint3D(1, 2, 3), 50),
+                                       Rotation(FloatPoint3D(-1, -2, -3), 100),
+                                       axis, angle_a, angle_b));
+}
+
+}  // namespace blink