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33 lines
1.1 KiB
C++
33 lines
1.1 KiB
C++
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#include "tesseract/ccutil/unichar.h"
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using tesseract::UNICHAR;
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namespace {
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TEST(UnicharTest, Conversion) {
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// This test verifies that Unichar::UTF8ToUTF32 and Unichar::UTF32ToUTF8
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// show the required conversion properties.
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// Test for round-trip utf8-32-8 for 1, 2, 3 and 4 byte codes.
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const char* kUTF8Src = "a\u05d0\u0ca4\U0002a714";
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const std::vector<char32> kUTF32Src = {'a', 0x5d0, 0xca4, 0x2a714};
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// Check for round-trip conversion.
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std::vector<char32> utf32 = UNICHAR::UTF8ToUTF32(kUTF8Src);
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EXPECT_THAT(utf32, testing::ElementsAreArray(kUTF32Src));
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string utf8 = UNICHAR::UTF32ToUTF8(utf32);
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EXPECT_STREQ(kUTF8Src, utf8.c_str());
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}
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TEST(UnicharTest, InvalidText) {
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// This test verifies that Unichar correctly deals with invalid text.
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const char* kInvalidUTF8 = "a b\200d string";
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const std::vector<char32> kInvalidUTF32 = {'a', ' ', 0x200000, 'x'};
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// Invalid utf8 produces an empty vector.
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std::vector<char32> utf32 = UNICHAR::UTF8ToUTF32(kInvalidUTF8);
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EXPECT_TRUE(utf32.empty());
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// Invalid utf32 produces an empty string.
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string utf8 = UNICHAR::UTF32ToUTF8(kInvalidUTF32);
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EXPECT_TRUE(utf8.empty());
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}
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} // namespace
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