129 lines
2.5 KiB
C++
129 lines
2.5 KiB
C++
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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#include <gtest/gtest.h>
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#include <cstring>
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#include <map>
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#include <stdexcept>
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#include <string>
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#include <utility>
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#include "opentelemetry/nostd/string_view.h"
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using opentelemetry::nostd::string_view;
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TEST(StringViewTest, DefaultConstruction)
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{
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string_view ref;
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EXPECT_EQ(ref.data(), nullptr);
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EXPECT_EQ(ref.length(), 0);
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}
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TEST(StringViewTest, CStringInitialization)
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{
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const char *val = "hello world";
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string_view ref(val);
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EXPECT_EQ(ref.data(), val);
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EXPECT_EQ(ref.length(), std::strlen(val));
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}
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TEST(StringViewTest, StdStringInitialization)
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{
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const std::string val = "hello world";
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string_view ref(val);
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EXPECT_EQ(ref.data(), val.data());
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EXPECT_EQ(ref.length(), val.size());
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}
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TEST(StringViewTest, Copy)
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{
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const std::string val = "hello world";
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string_view ref(val);
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string_view cpy(ref);
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EXPECT_EQ(cpy.data(), val);
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EXPECT_EQ(cpy.length(), val.length());
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EXPECT_EQ(cpy, val);
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}
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TEST(StringViewTest, Accessor)
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{
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string_view s = "abc123";
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EXPECT_EQ(s.data(), &s[0]);
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EXPECT_EQ(s.data() + 1, &s[1]);
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}
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TEST(StringViewTest, ExplicitStdStringConversion)
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{
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std::string s = static_cast<std::string>(string_view{"abc"});
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EXPECT_EQ(s, "abc");
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}
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TEST(StringViewTest, SubstrPortion)
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{
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string_view s = "abc123";
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EXPECT_EQ("123", s.substr(3));
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EXPECT_EQ("12", s.substr(3, 2));
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}
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TEST(StringViewTest, SubstrOutOfRange)
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{
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string_view s = "abc123";
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#if __EXCEPTIONS || (defined(OPENTELEMETRY_STL_VERSION) && (OPENTELEMETRY_STL_VERSION >= 2017))
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EXPECT_THROW((void)s.substr(10), std::out_of_range);
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#else
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EXPECT_DEATH({ s.substr(10); }, "");
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#endif
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}
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TEST(StringViewTest, FindSingleCharacter)
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{
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string_view s = "abc";
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// starting from 0-th position (default)
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EXPECT_EQ(s.find('a'), 0);
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EXPECT_EQ(s.find('b'), 1);
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EXPECT_EQ(s.find('c'), 2);
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EXPECT_EQ(s.find('d'), -1); // FIXME: string_view:npos - problem with linker
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// starting from given index
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EXPECT_EQ(s.find('a', 1), -1);
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EXPECT_EQ(s.find('b', 1), 1);
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// out of index
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EXPECT_EQ(s.find('a', 10), -1);
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}
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TEST(StringViewTest, Compare)
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{
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string_view s1 = "aaa";
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string_view s2 = "bbb";
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string_view s3 = "aaa";
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// Equals
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EXPECT_EQ(s1, s3);
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EXPECT_EQ(s1, s1);
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// Less then
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EXPECT_LT(s1, s2);
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// Greater then
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EXPECT_GT(s2, s1);
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}
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TEST(StringViewTest, MapKeyOrdering)
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{
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std::map<string_view, size_t> m = {{"bbb", 2}, {"aaa", 1}, {"ccc", 3}};
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size_t i = 1;
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for (const auto &kv : m)
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{
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EXPECT_EQ(kv.second, i);
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i++;
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}
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}
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