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https://github.com/tesseract-ocr/tesseract.git
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93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
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#include "tesseract/training/ligature_table.h"
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#include "tesseract/training/commandlineflags.h"
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#include "tesseract/training/fileio.h"
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#include "tesseract/training/pango_font_info.h"
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DECLARE_STRING_PARAM_FLAG(fonts_dir);
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DECLARE_STRING_PARAM_FLAG(fontconfig_tmpdir);
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namespace {
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using tesseract::File;
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using tesseract::LigatureTable;
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using tesseract::PangoFontInfo;
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const char kEngNonLigatureText[] = "fidelity effigy ſteep";
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// Same as above text, but with "fi" in the first word and "ffi" in the second
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// word replaced with their respective ligatures.
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const char kEngLigatureText[] = "fidelity effigy ſteep";
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// Same as kEngLigatureText but with "fi" in both words replaced with their
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// ligature. The test Verdana font does not support the "ffi" or "ſt" ligature.
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const char kRenderableEngLigatureText[] = "fidelity effigy ſteep";
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class LigatureTableTest : public ::testing::Test {
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protected:
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static void SetUpTestCase() {
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FLAGS_fonts_dir = File::JoinPath(FLAGS_test_srcdir, "testdata");
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FLAGS_fontconfig_tmpdir = FLAGS_test_tmpdir;
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}
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void SetUp() { lig_table_ = LigatureTable::Get(); }
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LigatureTable* lig_table_;
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};
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TEST_F(LigatureTableTest, DoesFillLigatureTables) {
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EXPECT_GT(lig_table_->norm_to_lig_table().size(), 0);
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EXPECT_GT(lig_table_->lig_to_norm_table().size(), 0);
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}
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TEST_F(LigatureTableTest, DoesAddLigatures) {
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EXPECT_STREQ(kEngLigatureText,
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lig_table_->AddLigatures(kEngNonLigatureText, nullptr).c_str());
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}
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TEST_F(LigatureTableTest, DoesAddLigaturesWithSupportedFont) {
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PangoFontInfo font;
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EXPECT_TRUE(font.ParseFontDescriptionName("Verdana"));
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EXPECT_STREQ(kRenderableEngLigatureText,
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lig_table_->AddLigatures(kEngNonLigatureText, &font).c_str());
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}
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TEST_F(LigatureTableTest, DoesNotAddLigaturesWithUnsupportedFont) {
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PangoFontInfo font;
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EXPECT_TRUE(font.ParseFontDescriptionName("Lohit Hindi"));
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EXPECT_STREQ(kEngNonLigatureText,
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lig_table_->AddLigatures(kEngNonLigatureText, &font).c_str());
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}
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TEST_F(LigatureTableTest, DoesRemoveLigatures) {
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EXPECT_STREQ(kEngNonLigatureText,
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lig_table_->RemoveLigatures(kEngLigatureText).c_str());
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}
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TEST_F(LigatureTableTest, TestCustomLigatures) {
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const char* kTestCases[] = {
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"act", "a\uE003", "publiſh", "publi\uE006", "ſince",
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"\uE007nce", "aſleep", "a\uE008eep", "neceſſary", "nece\uE009ary",
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};
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for (int i = 0; i < ARRAYSIZE(kTestCases); i += 2) {
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EXPECT_STREQ(kTestCases[i + 1],
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lig_table_->AddLigatures(kTestCases[i], nullptr).c_str());
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EXPECT_STREQ(kTestCases[i],
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lig_table_->RemoveLigatures(kTestCases[i + 1]).c_str());
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EXPECT_STREQ(kTestCases[i],
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lig_table_->RemoveCustomLigatures(kTestCases[i + 1]).c_str());
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}
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}
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TEST_F(LigatureTableTest, TestRemovesCustomLigatures) {
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const char* kTestCases[] = {
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"fiction",
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"fi\uE003ion",
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"fiction",
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};
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for (int i = 0; i < ARRAYSIZE(kTestCases); i += 3) {
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EXPECT_STREQ(kTestCases[i + 1],
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lig_table_->AddLigatures(kTestCases[i], nullptr).c_str());
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EXPECT_STREQ(kTestCases[i + 2],
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lig_table_->RemoveCustomLigatures(kTestCases[i + 1]).c_str());
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}
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}
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} // namespace
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