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