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// Copyright 2015 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/fxcrt/fx_bidi.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
const wchar_t kNeutralChar = 32;
const wchar_t kLeftChar = 65;
const wchar_t kRightChar = 1424;
} // namespace
TEST(fxcrt, BidiCharEmpty) {
CFX_BidiChar bidi;
CFX_BidiChar::Segment info;
info = bidi.GetSegmentInfo();
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, info.direction);
EXPECT_EQ(0, info.start);
EXPECT_EQ(0, info.count);
EXPECT_FALSE(bidi.EndChar());
}
TEST(fxcrt, BidiCharLeft) {
CFX_BidiChar bidi;
CFX_BidiChar::Segment info;
EXPECT_TRUE(bidi.AppendChar(kLeftChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(0, info.start);
EXPECT_EQ(0, info.count);
EXPECT_FALSE(bidi.AppendChar(kLeftChar));
EXPECT_FALSE(bidi.AppendChar(kLeftChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, info.direction);
EXPECT_EQ(0, info.start);
EXPECT_EQ(0, info.count);
EXPECT_TRUE(bidi.EndChar());
info = bidi.GetSegmentInfo();
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, info.direction);
EXPECT_EQ(0, info.start);
EXPECT_EQ(3, info.count);
EXPECT_FALSE(bidi.EndChar());
}
TEST(fxcrt, BidiCharLeftNeutralRight) {
CFX_BidiChar bidi;
CFX_BidiChar::Segment info;
EXPECT_TRUE(bidi.AppendChar(kLeftChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(0, info.start);
EXPECT_EQ(0, info.count);
EXPECT_FALSE(bidi.AppendChar(kLeftChar));
EXPECT_FALSE(bidi.AppendChar(kLeftChar));
EXPECT_TRUE(bidi.AppendChar(kNeutralChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(0, info.start);
EXPECT_EQ(3, info.count);
EXPECT_FALSE(bidi.AppendChar(kNeutralChar));
EXPECT_FALSE(bidi.AppendChar(kNeutralChar));
EXPECT_FALSE(bidi.AppendChar(kNeutralChar));
EXPECT_TRUE(bidi.AppendChar(kRightChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, info.direction);
EXPECT_EQ(3, info.start);
EXPECT_EQ(4, info.count);
EXPECT_TRUE(bidi.EndChar());
info = bidi.GetSegmentInfo();
EXPECT_EQ(CFX_BidiChar::Direction::kRight, info.direction);
EXPECT_EQ(7, info.start);
EXPECT_EQ(1, info.count);
EXPECT_FALSE(bidi.EndChar());
}
TEST(fxcrt, BidiCharLeftRightLeft) {
CFX_BidiChar bidi;
CFX_BidiChar::Segment info;
EXPECT_TRUE(bidi.AppendChar(kLeftChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(0, info.start);
EXPECT_EQ(0, info.count);
EXPECT_FALSE(bidi.AppendChar(kLeftChar));
EXPECT_FALSE(bidi.AppendChar(kLeftChar));
EXPECT_TRUE(bidi.AppendChar(kRightChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(0, info.start);
EXPECT_EQ(3, info.count);
EXPECT_FALSE(bidi.AppendChar(kRightChar));
EXPECT_FALSE(bidi.AppendChar(kRightChar));
EXPECT_FALSE(bidi.AppendChar(kRightChar));
EXPECT_TRUE(bidi.AppendChar(kLeftChar));
info = bidi.GetSegmentInfo();
EXPECT_EQ(CFX_BidiChar::Direction::kRight, info.direction);
EXPECT_EQ(3, info.start);
EXPECT_EQ(4, info.count);
EXPECT_TRUE(bidi.EndChar());
info = bidi.GetSegmentInfo();
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, info.direction);
EXPECT_EQ(7, info.start);
EXPECT_EQ(1, info.count);
EXPECT_FALSE(bidi.EndChar());
}
TEST(fxcrt, BidiStringEmpty) {
CFX_BidiString bidi(L"");
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, bidi.OverallDirection());
EXPECT_TRUE(bidi.begin() == bidi.end());
}
TEST(fxcrt, BidiStringAllNeutral) {
{
const wchar_t str[] = {kNeutralChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, bidi.OverallDirection());
auto it = bidi.begin();
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
++it;
EXPECT_TRUE(it == bidi.end());
}
{
const wchar_t str[] = {kNeutralChar, kNeutralChar, kNeutralChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, bidi.OverallDirection());
auto it = bidi.begin();
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(3, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
++it;
EXPECT_TRUE(it == bidi.end());
}
}
TEST(fxcrt, BidiStringAllLeft) {
{
const wchar_t str[] = {kLeftChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, bidi.OverallDirection());
auto it = bidi.begin();
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(0, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(0, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_TRUE(it == bidi.end());
}
{
const wchar_t str[] = {kLeftChar, kLeftChar, kLeftChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, bidi.OverallDirection());
auto it = bidi.begin();
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(0, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(0, it->start);
EXPECT_EQ(3, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_TRUE(it == bidi.end());
}
}
TEST(fxcrt, BidiStringAllRight) {
{
const wchar_t str[] = {kRightChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, bidi.OverallDirection());
auto it = bidi.begin();
EXPECT_EQ(0, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(0, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_TRUE(it == bidi.end());
}
{
const wchar_t str[] = {kRightChar, kRightChar, kRightChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, bidi.OverallDirection());
auto it = bidi.begin();
EXPECT_EQ(0, it->start);
EXPECT_EQ(3, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(0, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_TRUE(it == bidi.end());
}
}
TEST(fxcrt, BidiStringLeftNeutralLeftRight) {
const wchar_t str[] = {kLeftChar, kNeutralChar, kLeftChar, kRightChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, bidi.OverallDirection());
auto it = bidi.begin();
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(0, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(0, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(1, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(2, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(3, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_TRUE(it == bidi.end());
}
TEST(fxcrt, BidiStringRightNeutralLeftRight) {
const wchar_t str[] = {kRightChar, kNeutralChar, kLeftChar, kRightChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, bidi.OverallDirection());
auto it = bidi.begin();
EXPECT_EQ(3, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(2, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(1, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_EQ(0, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(0, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
EXPECT_TRUE(it == bidi.end());
}
TEST(fxcrt, BidiStringReverse) {
const wchar_t str[] = {kLeftChar, kNeutralChar, kRightChar, kLeftChar, 0};
CFX_BidiString bidi(str);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, bidi.OverallDirection());
bidi.SetOverallDirectionRight();
auto it = bidi.begin();
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(3, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, it->direction);
++it;
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(2, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kRight, it->direction);
ASSERT_FALSE(it == bidi.end());
++it;
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(1, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
++it;
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(1, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kLeft, it->direction);
++it;
ASSERT_FALSE(it == bidi.end());
EXPECT_EQ(0, it->start);
EXPECT_EQ(0, it->count);
EXPECT_EQ(CFX_BidiChar::Direction::kNeutral, it->direction);
++it;
EXPECT_TRUE(it == bidi.end());
}