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Diffstat (limited to 'tesseract/unittest/unichar_test.cc')
-rw-r--r-- | tesseract/unittest/unichar_test.cc | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tesseract/unittest/unichar_test.cc b/tesseract/unittest/unichar_test.cc new file mode 100644 index 00000000..54394436 --- /dev/null +++ b/tesseract/unittest/unichar_test.cc @@ -0,0 +1,43 @@ +// (C) Copyright 2017, Google Inc. +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// http://www.apache.org/licenses/LICENSE-2.0 +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "include_gunit.h" +#include "gmock/gmock.h" // for testing::ElementsAreArray +#include <tesseract/unichar.h> + +namespace tesseract { + +TEST(UnicharTest, Conversion) { + // This test verifies that Unichar::UTF8ToUTF32 and Unichar::UTF32ToUTF8 + // show the required conversion properties. + // Test for round-trip utf8-32-8 for 1, 2, 3 and 4 byte codes. + const char* kUTF8Src = "a\u05d0\u0ca4\U0002a714"; + const std::vector<char32> kUTF32Src = {'a', 0x5d0, 0xca4, 0x2a714}; + // Check for round-trip conversion. + std::vector<char32> utf32 = UNICHAR::UTF8ToUTF32(kUTF8Src); + EXPECT_THAT(utf32, testing::ElementsAreArray(kUTF32Src)); + std::string utf8 = UNICHAR::UTF32ToUTF8(utf32); + EXPECT_STREQ(kUTF8Src, utf8.c_str()); +} + +TEST(UnicharTest, InvalidText) { + // This test verifies that Unichar correctly deals with invalid text. + const char* kInvalidUTF8 = "a b\200d string"; + const std::vector<char32> kInvalidUTF32 = {'a', ' ', 0x200000, 'x'}; + // Invalid utf8 produces an empty vector. + std::vector<char32> utf32 = UNICHAR::UTF8ToUTF32(kInvalidUTF8); + EXPECT_TRUE(utf32.empty()); + // Invalid utf32 produces an empty string. + std::string utf8 = UNICHAR::UTF32ToUTF8(kInvalidUTF32); + EXPECT_TRUE(utf8.empty()); +} + +} // namespace |