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125 lines
3.8 KiB
125 lines
3.8 KiB
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <stddef.h>
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#include <cmath>
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#include <limits>
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#include "base/macros.h"
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#include "testing/gtest/include/gtest/gtest.h"
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#include "ui/gfx/geometry/scroll_offset.h"
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namespace gfx {
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TEST(ScrollOffsetTest, IsZero) {
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ScrollOffset zero(0, 0);
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ScrollOffset nonzero(0.1f, -0.1f);
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EXPECT_TRUE(zero.IsZero());
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EXPECT_FALSE(nonzero.IsZero());
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}
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TEST(ScrollOffsetTest, Add) {
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ScrollOffset f1(3.1f, 5.1f);
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ScrollOffset f2(4.3f, -1.3f);
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const struct {
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ScrollOffset expected;
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ScrollOffset actual;
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} scroll_offset_tests[] = {
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{ ScrollOffset(3.1f, 5.1f), f1 + ScrollOffset() },
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{ ScrollOffset(3.1f + 4.3f, 5.1f - 1.3f), f1 + f2 },
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{ ScrollOffset(3.1f - 4.3f, 5.1f + 1.3f), f1 - f2 }
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};
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for (size_t i = 0; i < arraysize(scroll_offset_tests); ++i)
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EXPECT_EQ(scroll_offset_tests[i].expected.ToString(),
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scroll_offset_tests[i].actual.ToString());
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}
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TEST(ScrollOffsetTest, Negative) {
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const struct {
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ScrollOffset expected;
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ScrollOffset actual;
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} scroll_offset_tests[] = {
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{ ScrollOffset(-0.3f, -0.3f), -ScrollOffset(0.3f, 0.3f) },
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{ ScrollOffset(0.3f, 0.3f), -ScrollOffset(-0.3f, -0.3f) },
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{ ScrollOffset(-0.3f, 0.3f), -ScrollOffset(0.3f, -0.3f) },
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{ ScrollOffset(0.3f, -0.3f), -ScrollOffset(-0.3f, 0.3f) }
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};
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for (size_t i = 0; i < arraysize(scroll_offset_tests); ++i)
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EXPECT_EQ(scroll_offset_tests[i].expected.ToString(),
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scroll_offset_tests[i].actual.ToString());
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}
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TEST(ScrollOffsetTest, Scale) {
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float float_values[][4] = {
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{ 4.5f, 1.2f, 3.3f, 5.6f },
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{ 4.5f, -1.2f, 3.3f, 5.6f },
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{ 4.5f, 1.2f, 3.3f, -5.6f },
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{ 4.5f, 1.2f, -3.3f, -5.6f },
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{ -4.5f, 1.2f, 3.3f, 5.6f },
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{ -4.5f, 1.2f, 0, 5.6f },
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{ -4.5f, 1.2f, 3.3f, 0 },
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{ 4.5f, 0, 3.3f, 5.6f },
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{ 0, 1.2f, 3.3f, 5.6f }
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};
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for (size_t i = 0; i < arraysize(float_values); ++i) {
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ScrollOffset v(float_values[i][0], float_values[i][1]);
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v.Scale(float_values[i][2], float_values[i][3]);
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EXPECT_EQ(v.x(), float_values[i][0] * float_values[i][2]);
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EXPECT_EQ(v.y(), float_values[i][1] * float_values[i][3]);
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}
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float single_values[][3] = {
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{ 4.5f, 1.2f, 3.3f },
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{ 4.5f, -1.2f, 3.3f },
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{ 4.5f, 1.2f, 3.3f },
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{ 4.5f, 1.2f, -3.3f },
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{ -4.5f, 1.2f, 3.3f },
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{ -4.5f, 1.2f, 0 },
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{ -4.5f, 1.2f, 3.3f },
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{ 4.5f, 0, 3.3f },
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{ 0, 1.2f, 3.3f }
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};
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for (size_t i = 0; i < arraysize(single_values); ++i) {
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ScrollOffset v(single_values[i][0], single_values[i][1]);
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v.Scale(single_values[i][2]);
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EXPECT_EQ(v.x(), single_values[i][0] * single_values[i][2]);
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EXPECT_EQ(v.y(), single_values[i][1] * single_values[i][2]);
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}
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}
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TEST(ScrollOffsetTest, ClampScrollOffset) {
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ScrollOffset a;
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a = ScrollOffset(3.5, 5.5);
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EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString());
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a.SetToMax(ScrollOffset(2.5, 4.5));
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EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString());
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a.SetToMax(ScrollOffset(3.5, 5.5));
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EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString());
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a.SetToMax(ScrollOffset(4.5, 2.5));
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EXPECT_EQ(ScrollOffset(4.5, 5.5).ToString(), a.ToString());
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a.SetToMax(ScrollOffset(8.5, 10.5));
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EXPECT_EQ(ScrollOffset(8.5, 10.5).ToString(), a.ToString());
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a.SetToMin(ScrollOffset(9.5, 11.5));
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EXPECT_EQ(ScrollOffset(8.5, 10.5).ToString(), a.ToString());
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a.SetToMin(ScrollOffset(8.5, 10.5));
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EXPECT_EQ(ScrollOffset(8.5, 10.5).ToString(), a.ToString());
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a.SetToMin(ScrollOffset(11.5, 9.5));
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EXPECT_EQ(ScrollOffset(8.5, 9.5).ToString(), a.ToString());
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a.SetToMin(ScrollOffset(7.5, 11.5));
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EXPECT_EQ(ScrollOffset(7.5, 9.5).ToString(), a.ToString());
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a.SetToMin(ScrollOffset(3.5, 5.5));
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EXPECT_EQ(ScrollOffset(3.5, 5.5).ToString(), a.ToString());
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}
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} // namespace gfx
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