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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/accessibility/ax_text_utils.h"
#include <stddef.h>
#include <utility>
#include "base/strings/utf_string_conversions.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/accessibility/ax_enums.mojom.h"
namespace ui {
TEST(AXTextUtils, FindAccessibleTextBoundaryWord) {
const std::u16string text = u"Hello there.This/is\ntesting.";
const size_t text_length = text.length();
std::vector<int> line_start_offsets;
line_start_offsets.push_back(19);
size_t result;
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 0,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(6UL, result);
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kWordStart, 5,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(0UL, result);
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 6,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(12UL, result);
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kWordStart, 11,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(6UL, result);
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kWordStart, 12,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(12UL, result);
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 15,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(17UL, result);
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kWordStart, 15,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(12UL, result);
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 16,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(17UL, result);
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 17,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(20UL, result);
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 20,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(text_length, result);
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kWordStart,
text_length, ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(20UL, result);
}
TEST(AXTextUtils, FindAccessibleTextBoundaryLine) {
const std::u16string text = u"Line 1.\nLine 2\n\t";
const size_t text_length = text.length();
std::vector<int> line_start_offsets;
line_start_offsets.push_back(8);
line_start_offsets.push_back(15);
size_t result;
// Basic cases.
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 5,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(8UL, result);
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kLineStart, 9,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(8UL, result);
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 10,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(15UL, result);
// Edge cases.
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kLineStart,
text_length, ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(15UL, result);
// When the start_offset is at the start of the next line and we are searching
// backwards, it should not move.
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kLineStart, 15,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(15UL, result);
// When the start_offset is at a hard line break and we are searching
// backwards, it should return the start of the previous line.
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kLineStart, 14,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(8UL, result);
// When the start_offset is at the start of a line and we are searching
// forwards, it should return the start of the next line.
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 8,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(15UL, result);
// When there is no previous line break and we are searching backwards,
// it should return 0.
result = FindAccessibleTextBoundary(text, line_start_offsets,
ax::mojom::TextBoundary::kLineStart, 4,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(0UL, result);
// When we are at the start of the last line and we are searching forwards.
// it should return the text length.
result = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 15,
ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(text_length, result);
}
TEST(AXTextUtils, FindAccessibleTextBoundarySentence) {
auto find_sentence_boundaries_at_offset = [](const std::u16string& text,
int offset) {
std::vector<int> line_start_offsets;
size_t backwards = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kSentenceStart,
offset, ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
size_t forwards = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kSentenceStart,
offset, ax::mojom::MoveDirection::kForward,
ax::mojom::TextAffinity::kDownstream);
return std::make_pair(backwards, forwards);
};
const std::u16string text =
u"Sentence 1. Sentence 2...\n\tSentence 3! Sentence 4";
std::pair<size_t, size_t> boundaries =
find_sentence_boundaries_at_offset(text, 5);
EXPECT_EQ(0UL, boundaries.first);
EXPECT_EQ(12UL, boundaries.second);
// When a sentence ends with multiple punctuation, we should look for the
// first word character that follows.
boundaries = find_sentence_boundaries_at_offset(text, 16);
EXPECT_EQ(12UL, boundaries.first);
EXPECT_EQ(27UL, boundaries.second);
// This is also true if we start in the middle of that punctuation.
boundaries = find_sentence_boundaries_at_offset(text, 23);
EXPECT_EQ(12UL, boundaries.first);
EXPECT_EQ(27UL, boundaries.second);
// When the offset is in the whitespace between two sentences, the boundaries
// should be those of the previous sentence to the beginning of the first
// non-whitespace character of the next one.
boundaries = find_sentence_boundaries_at_offset(text, 38);
EXPECT_EQ(27UL, boundaries.first);
EXPECT_EQ(39UL, boundaries.second);
// The end of the string should be considered the end of the last sentence
// regardless of whether or not there is punctuation.
boundaries = find_sentence_boundaries_at_offset(text, 44);
EXPECT_EQ(39UL, boundaries.first);
EXPECT_EQ(49UL, boundaries.second);
// The sentence should include whitespace all the way until the end of the
// string.
const std::u16string text2 = u"A sentence . \n\n\t\t\n";
boundaries = find_sentence_boundaries_at_offset(text2, 10);
EXPECT_EQ(0UL, boundaries.first);
EXPECT_EQ(18UL, boundaries.second);
}
TEST(AXTextUtils, FindAccessibleTextBoundaryCharacter) {
static const wchar_t* kCharacters[] = {
// An English word consisting of four ASCII characters.
L"w",
L"o",
L"r",
L"d",
L" ",
// A Hindi word (which means "Hindi") consisting of three Devanagari
// characters.
L"\x0939\x093F",
L"\x0928\x094D",
L"\x0926\x0940",
L" ",
// A Thai word (which means "feel") consisting of three Thai characters.
L"\x0E23\x0E39\x0E49",
L"\x0E2A\x0E36",
L"\x0E01",
L" ",
};
std::vector<std::u16string> characters;
std::u16string text;
for (auto*& i : kCharacters) {
characters.push_back(base::WideToUTF16(i));
text.append(characters.back());
}
auto verify_boundaries_at_offset = [&text](int offset, size_t start,
size_t end) {
testing::Message message;
message << "Testing character bounds at index " << offset;
SCOPED_TRACE(message);
std::vector<int> line_start_offsets;
size_t backwards = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kCharacter, offset,
ax::mojom::MoveDirection::kBackward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(backwards, start);
size_t forwards = FindAccessibleTextBoundary(
text, line_start_offsets, ax::mojom::TextBoundary::kCharacter, offset,
ax::mojom::MoveDirection::kForward,
ax::mojom::TextAffinity::kDownstream);
EXPECT_EQ(forwards, end);
};
verify_boundaries_at_offset(0, 0UL, 1UL);
verify_boundaries_at_offset(1, 1UL, 2UL);
verify_boundaries_at_offset(2, 2UL, 3UL);
verify_boundaries_at_offset(3, 3UL, 4UL);
verify_boundaries_at_offset(4, 4UL, 5UL);
verify_boundaries_at_offset(5, 5UL, 7UL);
verify_boundaries_at_offset(6, 5UL, 7UL);
verify_boundaries_at_offset(7, 7UL, 11UL);
verify_boundaries_at_offset(8, 7UL, 11UL);
verify_boundaries_at_offset(9, 7UL, 11UL);
verify_boundaries_at_offset(10, 7UL, 11UL);
verify_boundaries_at_offset(11, 11L, 12UL);
verify_boundaries_at_offset(12, 12L, 15UL);
verify_boundaries_at_offset(13, 12L, 15UL);
verify_boundaries_at_offset(14, 12L, 15UL);
verify_boundaries_at_offset(15, 15L, 17UL);
verify_boundaries_at_offset(16, 15L, 17UL);
verify_boundaries_at_offset(17, 17L, 18UL);
verify_boundaries_at_offset(18, 18L, 19UL);
}
TEST(AXTextUtils, GetWordOffsetsEmptyTest) {
const std::u16string text = u"";
std::vector<int> word_starts = GetWordStartOffsets(text);
std::vector<int> word_ends = GetWordEndOffsets(text);
EXPECT_EQ(0UL, word_starts.size());
EXPECT_EQ(0UL, word_ends.size());
}
TEST(AXTextUtils, GetWordStartOffsetsBasicTest) {
const std::u16string text = u"This is very simple input";
EXPECT_THAT(GetWordStartOffsets(text), testing::ElementsAre(0, 5, 8, 13, 20));
}
TEST(AXTextUtils, GetWordEndOffsetsBasicTest) {
const std::u16string text = u"This is very simple input";
EXPECT_THAT(GetWordEndOffsets(text), testing::ElementsAre(4, 7, 12, 19, 25));
}
TEST(AXTextUtils, GetWordStartOffsetsMalformedInputTest) {
const std::u16string text =
u"..we *## should parse $#@$ through bad ,, input";
EXPECT_THAT(GetWordStartOffsets(text),
testing::ElementsAre(2, 9, 16, 27, 35, 43));
}
TEST(AXTextUtils, GetSentenceStartOffsetsBasicTest) {
const std::u16string text =
u"This is the first sentence. This is the second sentence";
EXPECT_THAT(GetSentenceStartOffsets(text), testing::ElementsAre(0, 28));
}
TEST(AXTextUtils, GetSentenceEndOffsetsBasicTest) {
const std::u16string text =
u"This is the first sentence. This is the second sentence";
EXPECT_THAT(GetSentenceEndOffsets(text), testing::ElementsAre(28, 55));
}
TEST(AXTextUtils, GetSentenceStartOffsetsMalformedInputTest) {
const std::u16string text = u"is the first ... second.";
EXPECT_THAT(GetSentenceStartOffsets(text), testing::ElementsAre(0));
}
TEST(AXTextUtils, GetSentenceEndOffsetsMalformedInputTest) {
const std::u16string text = u"is the first ... second.";
EXPECT_THAT(GetSentenceEndOffsets(text), testing::ElementsAre(24));
}
} // namespace ui
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