mirror of
https://github.com/tesseract-ocr/tesseract.git
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2b7df59187
They were provided by Jeff Breidenbach <jbreiden@google.com>. Signed-off-by: Stefan Weil <sw@weilnetz.de>
65 lines
2.7 KiB
C++
65 lines
2.7 KiB
C++
#include "tesseract/training/validator.h"
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namespace tesseract {
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namespace {
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class TestableValidator : public Validator {
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public:
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static ViramaScript TestableMostFrequentViramaScript(
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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,
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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(
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{'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(
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{0x905, 0xc05, 0x906, 0x907}));
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EXPECT_EQ(ViramaScript::kKannada,
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TestableValidator::TestableMostFrequentViramaScript(
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{0xc85, 0xc05, 0xc86, 0xc87}));
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EXPECT_EQ(ViramaScript::kBengali,
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TestableValidator::TestableMostFrequentViramaScript(
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{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(
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{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(
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{0xd24, 0xd23, 0xd32, 0xd4d, '\'', 0x200d, 0x200c, 0x200d, 0x200c});
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std::vector<char32> str2(
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{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(Validator::ValidateCleanAndSegment(
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GraphemeNormMode::kSingleString, true, str1, &result1));
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EXPECT_TRUE(Validator::ValidateCleanAndSegment(
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GraphemeNormMode::kSingleString, true, result1[0], &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(Validator::ValidateCleanAndSegment(
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GraphemeNormMode::kSingleString, true, str2, &result3));
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EXPECT_TRUE(Validator::ValidateCleanAndSegment(
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GraphemeNormMode::kSingleString, true, result3[0], &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
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} // namespace tesseract
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