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break_list_unittest.cc
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// Copyright (c) 2012 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 "ui/gfx/break_list.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/range/range.h"
namespace gfx {
class BreakListTest : public testing::Test {};
TEST_F(BreakListTest, SetValue) {
// Check the default values applied to new instances.
BreakList<bool> style_breaks(false);
EXPECT_TRUE(style_breaks.EqualsValueForTesting(false));
style_breaks.SetValue(true);
EXPECT_TRUE(style_breaks.EqualsValueForTesting(true));
// Ensure that setting values works correctly.
BreakList<SkColor> color_breaks(SK_ColorRED);
EXPECT_TRUE(color_breaks.EqualsValueForTesting(SK_ColorRED));
color_breaks.SetValue(SK_ColorBLACK);
EXPECT_TRUE(color_breaks.EqualsValueForTesting(SK_ColorBLACK));
}
TEST_F(BreakListTest, ApplyValue) {
BreakList<bool> breaks(false);
const size_t max = 99;
breaks.SetMax(max);
// Ensure ApplyValue is a no-op on invalid and empty ranges.
breaks.ApplyValue(true, Range::InvalidRange());
EXPECT_TRUE(breaks.EqualsValueForTesting(false));
for (size_t i = 0; i < 3; ++i) {
breaks.ApplyValue(true, Range(i, i));
EXPECT_TRUE(breaks.EqualsValueForTesting(false));
}
// Apply a value to a valid range, check breaks; repeating should be no-op.
std::vector<std::pair<size_t, bool> > expected;
expected.push_back(std::pair<size_t, bool>(0, false));
expected.push_back(std::pair<size_t, bool>(2, true));
expected.push_back(std::pair<size_t, bool>(3, false));
for (size_t i = 0; i < 2; ++i) {
breaks.ApplyValue(true, Range(2, 3));
EXPECT_TRUE(breaks.EqualsForTesting(expected));
}
// Ensure setting a value overrides the ranged value.
breaks.SetValue(true);
EXPECT_TRUE(breaks.EqualsValueForTesting(true));
// Ensure applying a value over [0, |max|) is the same as setting a value.
breaks.ApplyValue(false, Range(0, max));
EXPECT_TRUE(breaks.EqualsValueForTesting(false));
// Ensure applying a value that is already applied has no effect.
breaks.ApplyValue(false, Range(0, 2));
breaks.ApplyValue(false, Range(3, 6));
breaks.ApplyValue(false, Range(7, max));
EXPECT_TRUE(breaks.EqualsValueForTesting(false));
// Ensure applying an identical neighboring value merges the ranges.
breaks.ApplyValue(true, Range(0, 3));
breaks.ApplyValue(true, Range(3, 6));
breaks.ApplyValue(true, Range(6, max));
EXPECT_TRUE(breaks.EqualsValueForTesting(true));
// Ensure applying a value with the same range overrides the ranged value.
breaks.ApplyValue(false, Range(2, 3));
breaks.ApplyValue(true, Range(2, 3));
EXPECT_TRUE(breaks.EqualsValueForTesting(true));
// Ensure applying a value with a containing range overrides contained values.
breaks.ApplyValue(false, Range(0, 1));
breaks.ApplyValue(false, Range(2, 3));
breaks.ApplyValue(true, Range(0, 3));
EXPECT_TRUE(breaks.EqualsValueForTesting(true));
breaks.ApplyValue(false, Range(4, 5));
breaks.ApplyValue(false, Range(6, 7));
breaks.ApplyValue(false, Range(8, 9));
breaks.ApplyValue(true, Range(4, 9));
EXPECT_TRUE(breaks.EqualsValueForTesting(true));
// Ensure applying various overlapping values yields the intended results.
breaks.ApplyValue(false, Range(1, 4));
breaks.ApplyValue(false, Range(5, 8));
breaks.ApplyValue(true, Range(0, 2));
breaks.ApplyValue(true, Range(3, 6));
breaks.ApplyValue(true, Range(7, max));
std::vector<std::pair<size_t, bool> > overlap;
overlap.push_back(std::pair<size_t, bool>(0, true));
overlap.push_back(std::pair<size_t, bool>(2, false));
overlap.push_back(std::pair<size_t, bool>(3, true));
overlap.push_back(std::pair<size_t, bool>(6, false));
overlap.push_back(std::pair<size_t, bool>(7, true));
EXPECT_TRUE(breaks.EqualsForTesting(overlap));
}
TEST_F(BreakListTest, SetMax) {
// Ensure values adjust to accommodate max position changes.
BreakList<bool> breaks(false);
breaks.SetMax(9);
breaks.ApplyValue(true, Range(0, 2));
breaks.ApplyValue(true, Range(3, 6));
breaks.ApplyValue(true, Range(7, 9));
std::vector<std::pair<size_t, bool> > expected;
expected.push_back(std::pair<size_t, bool>(0, true));
expected.push_back(std::pair<size_t, bool>(2, false));
expected.push_back(std::pair<size_t, bool>(3, true));
expected.push_back(std::pair<size_t, bool>(6, false));
expected.push_back(std::pair<size_t, bool>(7, true));
EXPECT_TRUE(breaks.EqualsForTesting(expected));
// Setting a smaller max should remove any corresponding breaks.
breaks.SetMax(7);
expected.resize(4);
EXPECT_TRUE(breaks.EqualsForTesting(expected));
breaks.SetMax(4);
expected.resize(3);
EXPECT_TRUE(breaks.EqualsForTesting(expected));
breaks.SetMax(4);
EXPECT_TRUE(breaks.EqualsForTesting(expected));
// Setting a larger max should not change any breaks.
breaks.SetMax(50);
EXPECT_TRUE(breaks.EqualsForTesting(expected));
}
TEST_F(BreakListTest, GetBreakAndRange) {
BreakList<bool> breaks(false);
breaks.SetMax(8);
breaks.ApplyValue(true, Range(1, 2));
breaks.ApplyValue(true, Range(4, 6));
struct {
size_t position;
size_t break_index;
Range range;
} cases[] = {
{ 0, 0, Range(0, 1) },
{ 1, 1, Range(1, 2) },
{ 2, 2, Range(2, 4) },
{ 3, 2, Range(2, 4) },
{ 4, 3, Range(4, 6) },
{ 5, 3, Range(4, 6) },
{ 6, 4, Range(6, 8) },
{ 7, 4, Range(6, 8) },
// Positions at or beyond the max simply return the last break and range.
{ 8, 4, Range(6, 8) },
{ 9, 4, Range(6, 8) },
};
for (size_t i = 0; i < arraysize(cases); ++i) {
BreakList<bool>::const_iterator it = breaks.GetBreak(cases[i].position);
EXPECT_EQ(breaks.breaks()[cases[i].break_index], *it);
EXPECT_EQ(breaks.GetRange(it), cases[i].range);
}
}
} // namespace gfx