tesseract  5.0.0
unichar_test.cc
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1 // (C) Copyright 2017, Google Inc.
2 // Licensed under the Apache License, Version 2.0 (the "License");
3 // you may not use this file except in compliance with the License.
4 // You may obtain a copy of the License at
5 // http://www.apache.org/licenses/LICENSE-2.0
6 // Unless required by applicable law or agreed to in writing, software
7 // distributed under the License is distributed on an "AS IS" BASIS,
8 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
9 // See the License for the specific language governing permissions and
10 // limitations under the License.
11 
12 #include <tesseract/unichar.h>
13 #include "gmock/gmock.h" // for testing::ElementsAreArray
14 #include "include_gunit.h"
15 
16 namespace tesseract {
17 
18 TEST(UnicharTest, Conversion) {
19  // This test verifies that Unichar::UTF8ToUTF32 and Unichar::UTF32ToUTF8
20  // show the required conversion properties.
21  // Test for round-trip utf8-32-8 for 1, 2, 3 and 4 byte codes.
22  const char *kUTF8Src = "a\u05d0\u0ca4\U0002a714";
23  const std::vector<char32> kUTF32Src = {'a', 0x5d0, 0xca4, 0x2a714};
24  // Check for round-trip conversion.
25  std::vector<char32> utf32 = UNICHAR::UTF8ToUTF32(kUTF8Src);
26  EXPECT_THAT(utf32, testing::ElementsAreArray(kUTF32Src));
27  std::string utf8 = UNICHAR::UTF32ToUTF8(utf32);
28  EXPECT_STREQ(kUTF8Src, utf8.c_str());
29 }
30 
31 TEST(UnicharTest, InvalidText) {
32  // This test verifies that Unichar correctly deals with invalid text.
33  const char *kInvalidUTF8 = "a b\200d string";
34  const std::vector<char32> kInvalidUTF32 = {'a', ' ', 0x200000, 'x'};
35  // Invalid utf8 produces an empty vector.
36  std::vector<char32> utf32 = UNICHAR::UTF8ToUTF32(kInvalidUTF8);
37  EXPECT_TRUE(utf32.empty());
38  // Invalid utf32 produces an empty string.
39  std::string utf8 = UNICHAR::UTF32ToUTF8(kInvalidUTF32);
40  EXPECT_TRUE(utf8.empty());
41 }
42 
43 } // namespace tesseract
TEST(TesseractInstanceTest, TestMultipleTessInstances)
static std::vector< char32 > UTF8ToUTF32(const char *utf8_str)
Definition: unichar.cpp:220
static std::string UTF32ToUTF8(const std::vector< char32 > &str32)
Definition: unichar.cpp:237