mirror of
https://github.com/tesseract-ocr/tesseract.git
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115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
// (C) Copyright 2017, Google Inc.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#if defined(_WIN32)
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#include <io.h> // for _access
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#else
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#include <unistd.h> // for access
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#endif
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#include "include_gunit.h"
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#include "dawg.h"
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#include "trie.h"
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#include "unicharset.h"
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#ifdef INCLUDE_TENSORFLOW
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#include "util/utf8/unicodetext.h" // for UnicodeText
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#endif
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namespace tesseract {
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// Replacement for std::filesystem::exists (C++-17)
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static bool file_exists(const char* filename) {
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#if defined(_WIN32)
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return _access(filename, 0) == 0;
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#else
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return access(filename, 0) == 0;
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#endif
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}
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class TatweelTest : public ::testing::Test {
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protected:
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void SetUp() override {
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static std::locale system_locale("");
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std::locale::global(system_locale);
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}
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TatweelTest() {
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#ifdef INCLUDE_TENSORFLOW
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std::string filename = TestDataNameToPath("ara.wordlist");
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if (file_exists(filename.c_str())) {
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std::string wordlist(u8"\u0640");
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CHECK_OK(file::GetContents(filename, &wordlist, file::Defaults()));
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// Put all the unicodes in the unicharset_.
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UnicodeText text;
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text.PointToUTF8(wordlist.data(), wordlist.size());
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int num_tatweel = 0;
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for (auto it = text.begin(); it != text.end(); ++it) {
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std::string utf8 = it.get_utf8_string();
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if (utf8.find(u8"\u0640") != std::string::npos) ++num_tatweel;
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unicharset_.unichar_insert(utf8.c_str());
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}
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LOG(INFO) << "Num tatweels in source data=" << num_tatweel;
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EXPECT_GT(num_tatweel, 0);
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}
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#endif
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}
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std::string TestDataNameToPath(const std::string& name) {
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return file::JoinPath(TESTDATA_DIR, name);
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}
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UNICHARSET unicharset_;
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};
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TEST_F(TatweelTest, UnicharsetIgnoresTatweel) {
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// This test verifies that the unicharset ignores the Tatweel character.
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for (int i = 0; i < unicharset_.size(); ++i) {
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const char* utf8 = unicharset_.id_to_unichar(i);
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EXPECT_EQ(strstr(utf8, u8"\u0640"), nullptr);
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}
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}
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TEST_F(TatweelTest, DictIgnoresTatweel) {
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// This test verifies that the dictionary ignores the Tatweel character.
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tesseract::Trie trie(tesseract::DAWG_TYPE_WORD, "ara", SYSTEM_DAWG_PERM,
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unicharset_.size(), 0);
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std::string filename = TestDataNameToPath("ara.wordlist");
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if (!file_exists(filename.c_str())) {
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LOG(INFO) << "Skip test because of missing " << filename;
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GTEST_SKIP();
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} else {
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EXPECT_TRUE(trie.read_and_add_word_list(
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filename.c_str(), unicharset_,
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tesseract::Trie::RRP_REVERSE_IF_HAS_RTL));
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EXPECT_EQ(0, trie.check_for_words(filename.c_str(), unicharset_, false));
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}
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}
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TEST_F(TatweelTest, UnicharsetLoadKeepsTatweel) {
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// This test verifies that a load of an existing unicharset keeps any
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// existing tatweel for backwards compatibility.
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std::string filename = TestDataNameToPath("ara.unicharset");
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if (!file_exists(filename.c_str())) {
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LOG(INFO) << "Skip test because of missing " << filename;
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GTEST_SKIP();
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} else {
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EXPECT_TRUE(unicharset_.load_from_file(filename.c_str()));
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int num_tatweel = 0;
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for (int i = 0; i < unicharset_.size(); ++i) {
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const char* utf8 = unicharset_.id_to_unichar(i);
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if (strstr(utf8, u8"\u0640") != nullptr) ++num_tatweel;
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}
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LOG(INFO) << "Num tatweels in unicharset=" << num_tatweel;
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EXPECT_EQ(num_tatweel, 4);
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}
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}
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} // namespace
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