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https://github.com/tesseract-ocr/tesseract.git
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9e66fb918f
It was formatted with clang-format-7 -i unittest/*.{c*,h}.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
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#include <set>
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#include <string>
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#include <vector>
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#include "util/process/subprocess.h"
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#include "tesseract/ccstruct/ratngs.h"
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#include "tesseract/ccutil/unicharset.h"
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#include "tesseract/dict/trie.h"
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namespace {
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void RemoveTrailingLineTerminators(char* line) {
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char* end = line + strlen(line) - 1;
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while (end >= line && ('\n' == *end || '\r' == *end)) {
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*end-- = 0;
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}
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}
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void AddLineToSet(std::set<string>* words, char* line) {
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RemoveTrailingLineTerminators(line);
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words->insert(line);
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}
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// Test some basic functionality dealing with Dawgs (compressed dictionaries,
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// aka Directed Acyclic Word Graphs).
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class DawgTest : public testing::Test {
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protected:
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void LoadWordlist(const string& filename, std::set<string>* words) const {
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FileLineReader::Options options;
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options.set_comment_char(0);
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FileLineReader flr(filename.c_str(), options);
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flr.set_line_callback(NewPermanentCallback(AddLineToSet, words));
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flr.Reload();
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}
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string TestDataNameToPath(const string& name) const {
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return file::JoinPath(FLAGS_test_srcdir, "testdata/" + name);
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}
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string TessBinaryPath(const string& binary_name) const {
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return file::JoinPath(FLAGS_test_srcdir,
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}
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string OutputNameToPath(const string& name) const {
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return file::JoinPath(FLAGS_test_tmpdir, name);
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}
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int RunCommand(const string& program, const string& arg1, const string& arg2,
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const string& arg3) const {
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SubProcess p;
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std::vector<string> argv;
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argv.push_back(program);
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argv.push_back(arg1);
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argv.push_back(arg2);
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argv.push_back(arg3);
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p.SetProgram(TessBinaryPath(program), argv);
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p.Start();
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p.Wait();
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return p.exit_code();
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}
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// Test that we are able to convert a wordlist file (one "word" per line) to
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// a dawg (a compressed format) and then extract the original wordlist back
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// out using the tools "wordlist2dawg" and "dawg2wordlist."
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void TestDawgRoundTrip(const string& unicharset_filename,
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const string& wordlist_filename) const {
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std::set<string> orig_words, roundtrip_words;
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string unicharset = TestDataNameToPath(unicharset_filename);
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string orig_wordlist = TestDataNameToPath(wordlist_filename);
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string output_dawg = OutputNameToPath(wordlist_filename + ".dawg");
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string output_wordlist = OutputNameToPath(wordlist_filename);
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LoadWordlist(orig_wordlist, &orig_words);
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EXPECT_EQ(
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RunCommand("wordlist2dawg", orig_wordlist, output_dawg, unicharset), 0);
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EXPECT_EQ(
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RunCommand("dawg2wordlist", unicharset, output_dawg, output_wordlist),
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0);
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LoadWordlist(output_wordlist, &roundtrip_words);
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EXPECT_EQ(orig_words, roundtrip_words);
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}
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};
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TEST_F(DawgTest, TestDawgConversion) {
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TestDawgRoundTrip("eng.unicharset", "eng.wordlist.clean.freq");
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}
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TEST_F(DawgTest, TestMatching) {
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UNICHARSET unicharset;
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unicharset.load_from_file(TestDataNameToPath("eng.unicharset").c_str());
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tesseract::Trie trie(tesseract::DAWG_TYPE_WORD, "basic_dawg", NGRAM_PERM,
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unicharset.size(), 0);
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WERD_CHOICE space_apos(" '", unicharset);
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trie.add_word_to_dawg(space_apos);
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WERD_CHOICE space(" ", unicharset);
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// partial match ok - then good!
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EXPECT_TRUE(trie.prefix_in_dawg(space, false));
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// require complete match - not present.
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EXPECT_FALSE(trie.word_in_dawg(space));
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EXPECT_FALSE(trie.prefix_in_dawg(space, true));
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// partial or complete match ok for full word:
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EXPECT_TRUE(trie.prefix_in_dawg(space_apos, false));
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EXPECT_TRUE(trie.word_in_dawg(space_apos));
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EXPECT_TRUE(trie.prefix_in_dawg(space_apos, true));
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}
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} // namespace
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