| // Copyright 2014 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 <stddef.h> |
| |
| #include <cmath> |
| #include <limits> |
| |
| #include "base/stl_util.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "ui/gfx/geometry/scroll_offset.h" |
| |
| namespace gfx { |
| |
| TEST(ScrollOffsetTest, IsZero) { |
| ScrollOffset zero(0, 0); |
| ScrollOffset nonzero(0.1f, -0.1f); |
| |
| EXPECT_TRUE(zero.IsZero()); |
| EXPECT_FALSE(nonzero.IsZero()); |
| } |
| |
| TEST(ScrollOffsetTest, Add) { |
| ScrollOffset f1(3.1f, 5.1f); |
| ScrollOffset f2(4.3f, -1.3f); |
| |
| const struct { |
| ScrollOffset expected; |
| ScrollOffset actual; |
| } scroll_offset_tests[] = { |
| { ScrollOffset(3.1f, 5.1f), f1 + ScrollOffset() }, |
| { ScrollOffset(3.1f + 4.3f, 5.1f - 1.3f), f1 + f2 }, |
| { ScrollOffset(3.1f - 4.3f, 5.1f + 1.3f), f1 - f2 } |
| }; |
| |
| for (size_t i = 0; i < base::size(scroll_offset_tests); ++i) |
| EXPECT_EQ(scroll_offset_tests[i].expected.ToString(), |
| scroll_offset_tests[i].actual.ToString()); |
| } |
| |
| TEST(ScrollOffsetTest, Negative) { |
| const struct { |
| ScrollOffset expected; |
| ScrollOffset actual; |
| } scroll_offset_tests[] = { |
| { ScrollOffset(-0.3f, -0.3f), -ScrollOffset(0.3f, 0.3f) }, |
| { ScrollOffset(0.3f, 0.3f), -ScrollOffset(-0.3f, -0.3f) }, |
| { ScrollOffset(-0.3f, 0.3f), -ScrollOffset(0.3f, -0.3f) }, |
| { ScrollOffset(0.3f, -0.3f), -ScrollOffset(-0.3f, 0.3f) } |
| }; |
| |
| for (size_t i = 0; i < base::size(scroll_offset_tests); ++i) |
| EXPECT_EQ(scroll_offset_tests[i].expected.ToString(), |
| scroll_offset_tests[i].actual.ToString()); |
| } |
| |
| TEST(ScrollOffsetTest, Scale) { |
| float float_values[][4] = { |
| { 4.5f, 1.2f, 3.3f, 5.6f }, |
| { 4.5f, -1.2f, 3.3f, 5.6f }, |
| { 4.5f, 1.2f, 3.3f, -5.6f }, |
| { 4.5f, 1.2f, -3.3f, -5.6f }, |
| { -4.5f, 1.2f, 3.3f, 5.6f }, |
| { -4.5f, 1.2f, 0, 5.6f }, |
| { -4.5f, 1.2f, 3.3f, 0 }, |
| { 4.5f, 0, 3.3f, 5.6f }, |
| { 0, 1.2f, 3.3f, 5.6f } |
| }; |
| |
| for (size_t i = 0; i < base::size(float_values); ++i) { |
| ScrollOffset v(float_values[i][0], float_values[i][1]); |
| v.Scale(float_values[i][2], float_values[i][3]); |
| EXPECT_EQ(v.x(), float_values[i][0] * float_values[i][2]); |
| EXPECT_EQ(v.y(), float_values[i][1] * float_values[i][3]); |
| } |
| |
| float single_values[][3] = { |
| { 4.5f, 1.2f, 3.3f }, |
| { 4.5f, -1.2f, 3.3f }, |
| { 4.5f, 1.2f, 3.3f }, |
| { 4.5f, 1.2f, -3.3f }, |
| { -4.5f, 1.2f, 3.3f }, |
| { -4.5f, 1.2f, 0 }, |
| { -4.5f, 1.2f, 3.3f }, |
| { 4.5f, 0, 3.3f }, |
| { 0, 1.2f, 3.3f } |
| }; |
| |
| for (size_t i = 0; i < base::size(single_values); ++i) { |
| ScrollOffset v(single_values[i][0], single_values[i][1]); |
| v.Scale(single_values[i][2]); |
| EXPECT_EQ(v.x(), single_values[i][0] * single_values[i][2]); |
| EXPECT_EQ(v.y(), single_values[i][1] * single_values[i][2]); |
| } |
| } |
| |
| TEST(ScrollOffsetTest, ClampScrollOffset) { |
| ScrollOffset a; |
| |
| a = ScrollOffset(3.5, 5.5); |
| EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString()); |
| a.SetToMax(ScrollOffset(2.5, 4.5)); |
| EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString()); |
| a.SetToMax(ScrollOffset(3.5, 5.5)); |
| EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString()); |
| a.SetToMax(ScrollOffset(4.5, 2.5)); |
| EXPECT_EQ(ScrollOffset(4.5, 5.5).ToString(), a.ToString()); |
| a.SetToMax(ScrollOffset(8.5, 10.5)); |
| EXPECT_EQ(ScrollOffset(8.5, 10.5).ToString(), a.ToString()); |
| |
| a.SetToMin(ScrollOffset(9.5, 11.5)); |
| EXPECT_EQ(ScrollOffset(8.5, 10.5).ToString(), a.ToString()); |
| a.SetToMin(ScrollOffset(8.5, 10.5)); |
| EXPECT_EQ(ScrollOffset(8.5, 10.5).ToString(), a.ToString()); |
| a.SetToMin(ScrollOffset(11.5, 9.5)); |
| EXPECT_EQ(ScrollOffset(8.5, 9.5).ToString(), a.ToString()); |
| a.SetToMin(ScrollOffset(7.5, 11.5)); |
| EXPECT_EQ(ScrollOffset(7.5, 9.5).ToString(), a.ToString()); |
| a.SetToMin(ScrollOffset(3.5, 5.5)); |
| EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString()); |
| } |
| |
| } // namespace gfx |