257 lines
8.5 KiB
C++
257 lines
8.5 KiB
C++
// Formatting library for C++ - tests of formatters for standard library types
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#include "fmt/std.h"
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#include <bitset>
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#include <stdexcept>
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#include <string>
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#include <vector>
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#include "fmt/os.h" // fmt::system_category
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#include "fmt/ranges.h"
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#include "gtest-extra.h" // StartsWith
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#ifdef __cpp_lib_filesystem
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TEST(std_test, path) {
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using std::filesystem::path;
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EXPECT_EQ(fmt::format("{}", path("/usr/bin")), "/usr/bin");
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EXPECT_EQ(fmt::format("{:?}", path("/usr/bin")), "\"/usr/bin\"");
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EXPECT_EQ(fmt::format("{:8}", path("foo")), "foo ");
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EXPECT_EQ(fmt::format("{}", path("foo\"bar")), "foo\"bar");
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EXPECT_EQ(fmt::format("{:?}", path("foo\"bar")), "\"foo\\\"bar\"");
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# ifdef _WIN32
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EXPECT_EQ(fmt::format("{}", path(
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L"\x0428\x0447\x0443\x0447\x044B\x043D\x0448"
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L"\x0447\x044B\x043D\x0430")),
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"Шчучыншчына");
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EXPECT_EQ(fmt::format("{}", path(L"\xd800")), "<EFBFBD>");
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EXPECT_EQ(fmt::format("{:?}", path(L"\xd800")), "\"\\ud800\"");
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# endif
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}
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// Test ambiguity problem described in #2954.
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TEST(ranges_std_test, format_vector_path) {
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auto p = std::filesystem::path("foo/bar.txt");
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auto c = std::vector<std::string>{"abc", "def"};
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EXPECT_EQ(fmt::format("path={}, range={}", p, c),
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"path=foo/bar.txt, range=[\"abc\", \"def\"]");
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}
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// Test that path is not escaped twice in the debug mode.
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TEST(ranges_std_test, format_quote_path) {
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auto vec =
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std::vector<std::filesystem::path>{"path1/file1.txt", "path2/file2.txt"};
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EXPECT_EQ(fmt::format("{}", vec),
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"[\"path1/file1.txt\", \"path2/file2.txt\"]");
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# ifdef __cpp_lib_optional
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auto o = std::optional<std::filesystem::path>("path/file.txt");
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EXPECT_EQ(fmt::format("{}", o), "optional(\"path/file.txt\")");
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EXPECT_EQ(fmt::format("{:?}", o), "optional(\"path/file.txt\")");
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# endif
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}
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#endif
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TEST(std_test, thread_id) {
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EXPECT_FALSE(fmt::format("{}", std::this_thread::get_id()).empty());
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}
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TEST(std_test, optional) {
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#ifdef __cpp_lib_optional
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EXPECT_EQ(fmt::format("{}", std::optional<int>{}), "none");
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EXPECT_EQ(fmt::format("{}", std::pair{1, "second"}), "(1, \"second\")");
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EXPECT_EQ(fmt::format("{}", std::vector{std::optional{1}, std::optional{2},
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std::optional{3}}),
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"[optional(1), optional(2), optional(3)]");
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EXPECT_EQ(
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fmt::format("{}", std::optional<std::optional<const char*>>{{"nested"}}),
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"optional(optional(\"nested\"))");
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EXPECT_EQ(
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fmt::format("{:<{}}", std::optional{std::string{"left aligned"}}, 30),
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"optional(\"left aligned\" )");
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EXPECT_EQ(
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fmt::format("{::d}", std::optional{std::vector{'h', 'e', 'l', 'l', 'o'}}),
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"optional([104, 101, 108, 108, 111])");
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EXPECT_EQ(fmt::format("{}", std::optional{std::string{"string"}}),
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"optional(\"string\")");
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EXPECT_EQ(fmt::format("{}", std::optional{'C'}), "optional(\'C\')");
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EXPECT_EQ(fmt::format("{:.{}f}", std::optional{3.14}, 1), "optional(3.1)");
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struct unformattable {};
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EXPECT_FALSE((fmt::is_formattable<unformattable>::value));
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EXPECT_FALSE((fmt::is_formattable<std::optional<unformattable>>::value));
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EXPECT_TRUE((fmt::is_formattable<std::optional<int>>::value));
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#endif
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}
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struct throws_on_move {
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throws_on_move() = default;
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[[noreturn]] throws_on_move(throws_on_move&&) {
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throw std::runtime_error("Thrown by throws_on_move");
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}
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throws_on_move(const throws_on_move&) = default;
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};
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namespace fmt {
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template <> struct formatter<throws_on_move> : formatter<string_view> {
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auto format(const throws_on_move&, format_context& ctx) const
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-> decltype(ctx.out()) {
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string_view str("<throws_on_move>");
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return formatter<string_view>::format(str, ctx);
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}
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};
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} // namespace fmt
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TEST(std_test, variant) {
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#ifdef __cpp_lib_variant
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EXPECT_EQ(fmt::format("{}", std::monostate{}), "monostate");
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using V0 = std::variant<int, float, std::string, char>;
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V0 v0(42);
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V0 v1(1.5f);
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V0 v2("hello");
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V0 v3('i');
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EXPECT_EQ(fmt::format("{}", v0), "variant(42)");
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EXPECT_EQ(fmt::format("{}", v1), "variant(1.5)");
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EXPECT_EQ(fmt::format("{}", v2), "variant(\"hello\")");
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EXPECT_EQ(fmt::format("{}", v3), "variant('i')");
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struct unformattable {};
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EXPECT_FALSE((fmt::is_formattable<unformattable>::value));
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EXPECT_FALSE((fmt::is_formattable<std::variant<unformattable>>::value));
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EXPECT_FALSE((fmt::is_formattable<std::variant<unformattable, int>>::value));
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EXPECT_FALSE((fmt::is_formattable<std::variant<int, unformattable>>::value));
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EXPECT_FALSE(
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(fmt::is_formattable<std::variant<unformattable, unformattable>>::value));
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EXPECT_TRUE((fmt::is_formattable<std::variant<int, float>>::value));
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using V1 = std::variant<std::monostate, std::string, std::string>;
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V1 v4{};
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V1 v5{std::in_place_index<1>, "yes, this is variant"};
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EXPECT_EQ(fmt::format("{}", v4), "variant(monostate)");
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EXPECT_EQ(fmt::format("{}", v5), "variant(\"yes, this is variant\")");
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volatile int i = 42; // Test compile error before GCC 11 described in #3068.
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EXPECT_EQ(fmt::format("{}", i), "42");
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std::variant<std::monostate, throws_on_move> v6;
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try {
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throws_on_move thrower;
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v6.emplace<throws_on_move>(std::move(thrower));
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} catch (const std::runtime_error&) {
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}
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// v6 is now valueless by exception
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EXPECT_EQ(fmt::format("{}", v6), "variant(valueless by exception)");
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#endif
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}
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TEST(std_test, error_code) {
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EXPECT_EQ("generic:42",
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fmt::format(FMT_STRING("{0}"),
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std::error_code(42, std::generic_category())));
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EXPECT_EQ("system:42",
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fmt::format(FMT_STRING("{0}"),
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std::error_code(42, fmt::system_category())));
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EXPECT_EQ("system:-42",
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fmt::format(FMT_STRING("{0}"),
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std::error_code(-42, fmt::system_category())));
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}
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template <typename Catch> void exception_test() {
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try {
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throw std::runtime_error("Test Exception");
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} catch (const Catch& ex) {
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EXPECT_EQ("Test Exception", fmt::format("{}", ex));
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EXPECT_EQ("std::runtime_error: Test Exception", fmt::format("{:t}", ex));
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}
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}
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namespace my_ns1 {
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namespace my_ns2 {
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struct my_exception : public std::exception {
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private:
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std::string msg;
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public:
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my_exception(const std::string& s) : msg(s) {}
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const char* what() const noexcept override;
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};
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const char* my_exception::what() const noexcept { return msg.c_str(); }
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} // namespace my_ns2
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} // namespace my_ns1
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TEST(std_test, exception) {
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using testing::StartsWith;
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exception_test<std::exception>();
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exception_test<std::runtime_error>();
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try {
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using namespace my_ns1::my_ns2;
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throw my_exception("My Exception");
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} catch (const std::exception& ex) {
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EXPECT_EQ("my_ns1::my_ns2::my_exception: My Exception",
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fmt::format("{:t}", ex));
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EXPECT_EQ("My Exception", fmt::format("{:}", ex));
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}
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try {
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throw std::system_error(std::error_code(), "message");
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} catch (const std::system_error& ex) {
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EXPECT_THAT(fmt::format("{:t}", ex), StartsWith("std::system_error: "));
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}
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#ifdef __cpp_lib_filesystem
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// Tests that the inline namespace is stripped out, e.g.
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// std::filesystem::__cxx11::* -> std::filesystem::*.
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try {
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throw std::filesystem::filesystem_error("message", std::error_code());
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} catch (const std::filesystem::filesystem_error& ex) {
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EXPECT_THAT(fmt::format("{:t}", ex),
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StartsWith("std::filesystem::filesystem_error: "));
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}
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#endif
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}
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TEST(std_test, format_bit_reference) {
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std::bitset<2> bs(1);
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EXPECT_EQ(fmt::format("{} {}", bs[0], bs[1]), "true false");
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std::vector<bool> v = {true, false};
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EXPECT_EQ(fmt::format("{} {}", v[0], v[1]), "true false");
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}
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TEST(std_test, format_const_bit_reference) {
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const std::bitset<2> bs(1);
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EXPECT_EQ(fmt::format("{} {}", bs[0], bs[1]), "true false");
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const std::vector<bool> v = {true, false};
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EXPECT_EQ(fmt::format("{} {}", v[0], v[1]), "true false");
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}
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TEST(std_test, format_atomic) {
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std::atomic<bool> b(false);
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EXPECT_EQ(fmt::format("{}", b), "false");
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const std::atomic<bool> cb(true);
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EXPECT_EQ(fmt::format("{}", cb), "true");
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}
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#ifdef __cpp_lib_atomic_flag_test
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TEST(std_test, format_atomic_flag) {
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std::atomic_flag f = ATOMIC_FLAG_INIT;
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(void) f.test_and_set();
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EXPECT_EQ(fmt::format("{}", f), "true");
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const std::atomic_flag cf = ATOMIC_FLAG_INIT;
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EXPECT_EQ(fmt::format("{}", cf), "false");
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}
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#endif // __cpp_lib_atomic_flag_test
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