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https://github.com/tesseract-ocr/tesseract.git
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68 lines
3.3 KiB
C++
68 lines
3.3 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 "validator.h"
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#include "gmock/gmock.h" // for testing::ElementsAreArray
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#include "include_gunit.h"
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namespace tesseract {
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class TestableValidator : public Validator {
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public:
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static ViramaScript TestableMostFrequentViramaScript(const std::vector<char32> &utf32) {
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return MostFrequentViramaScript(utf32);
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}
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};
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// The majority of Validator is tested by the script-specific tests of its
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// subclasses, but the MostFrequentViramaScript function is worth a unittest.
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TEST(ValidatorTest, MostFrequentViramaScript) {
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// The most frequent virama script should come out correct, despite
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// distractions from other scripts.
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EXPECT_EQ(ViramaScript::kTelugu, TestableValidator::TestableMostFrequentViramaScript({0xc05}));
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// It is still Telugu surrounded by Latin.
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EXPECT_EQ(ViramaScript::kTelugu,
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TestableValidator::TestableMostFrequentViramaScript({'a', 0xc05, 'b', 'c'}));
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// But not still Telugu surrounded by Devanagari.
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EXPECT_EQ(ViramaScript::kDevanagari,
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TestableValidator::TestableMostFrequentViramaScript({0x905, 0xc05, 0x906, 0x907}));
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EXPECT_EQ(ViramaScript::kKannada,
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TestableValidator::TestableMostFrequentViramaScript({0xc85, 0xc05, 0xc86, 0xc87}));
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EXPECT_EQ(ViramaScript::kBengali,
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TestableValidator::TestableMostFrequentViramaScript({0x985, 0xc05, 0x986, 0x987}));
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// Danda and double Danda don't count as Devanagari, as they are common.
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EXPECT_EQ(ViramaScript::kTelugu,
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TestableValidator::TestableMostFrequentViramaScript({0x964, 0xc05, 0x965, 0x965}));
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}
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// ValidateCleanAndSegment doesn't modify the input by much, but its
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// transformation should be idempotent. (Doesn't change again if re-applied.)
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TEST(ValidatorTest, Idempotency) {
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std::vector<char32> str1({0xd24, 0xd23, 0xd32, 0xd4d, '\'', 0x200d, 0x200c, 0x200d, 0x200c});
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std::vector<char32> str2({0xd24, 0xd23, 0xd32, 0xd4d, 0x200c, 0x200d, 0x200c, 0x200d, '\''});
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std::vector<std::vector<char32>> result1, result2, result3, result4;
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EXPECT_TRUE(
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Validator::ValidateCleanAndSegment(GraphemeNormMode::kSingleString, true, str1, &result1));
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EXPECT_TRUE(Validator::ValidateCleanAndSegment(GraphemeNormMode::kSingleString, true, result1[0],
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&result2));
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EXPECT_EQ(result1.size(), result2.size());
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EXPECT_THAT(result2[0], testing::ElementsAreArray(result1[0]));
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EXPECT_TRUE(
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Validator::ValidateCleanAndSegment(GraphemeNormMode::kSingleString, true, str2, &result3));
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EXPECT_TRUE(Validator::ValidateCleanAndSegment(GraphemeNormMode::kSingleString, true, result3[0],
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&result4));
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EXPECT_EQ(result3.size(), result4.size());
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EXPECT_THAT(result4[0], testing::ElementsAreArray(result3[0]));
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}
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} // namespace tesseract
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