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https://github.com/tesseract-ocr/tesseract.git
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47 lines
1.8 KiB
C++
47 lines
1.8 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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#include "include_gunit.h"
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#include "gmock/gmock.h" // for testing::ElementsAreArray
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#include <tesseract/unichar.h>
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using tesseract::char32;
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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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std::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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std::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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