5f76edd296
- Extract the metric parsing routine from ranking. - Add a test. - Accept null for string view.
44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
/**
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* Copyright 2021-2023 by XGBoost Contributors
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*/
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#include <gtest/gtest.h>
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#include <xgboost/string_view.h>
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#include <algorithm> // std::equal
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#include <sstream> // std::stringstream
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#include <string> // std::string
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namespace xgboost {
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TEST(StringView, Basic) {
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StringView str{"This is a string."};
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std::stringstream ss;
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ss << str;
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std::string res = ss.str();
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ASSERT_EQ(str.size(), res.size());
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ASSERT_TRUE(std::equal(res.cbegin(), res.cend(), str.cbegin()));
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auto substr = str.substr(5, 2);
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ASSERT_EQ(substr.size(), 2);
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ASSERT_EQ(StringView{"is"}.size(), 2);
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ASSERT_TRUE(substr == "is");
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ASSERT_FALSE(substr != "is");
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ASSERT_FALSE(substr == "foobar");
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ASSERT_FALSE(substr == "i");
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ASSERT_TRUE(std::equal(substr.crbegin(), substr.crend(), StringView{"si"}.cbegin()));
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{
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StringView empty{nullptr};
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ASSERT_TRUE(empty.empty());
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}
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{
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StringView empty{""};
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ASSERT_TRUE(empty.empty());
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StringView empty2{nullptr};
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ASSERT_EQ(empty, empty2);
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}
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}
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} // namespace xgboost
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