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- // Formatting library for C++ - dynamic argument store tests
- //
- // Copyright (c) 2012 - present, Victor Zverovich
- // All rights reserved.
- //
- // For the license information refer to format.h.
- #include "fmt/args.h"
- #include <memory>
- #include "gtest/gtest.h"
- TEST(args_test, basic) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- store.push_back(42);
- store.push_back("abc1");
- store.push_back(1.5f);
- EXPECT_EQ("42 and abc1 and 1.5", fmt::vformat("{} and {} and {}", store));
- }
- TEST(args_test, strings_and_refs) {
- // Unfortunately the tests are compiled with old ABI so strings use COW.
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- char str[] = "1234567890";
- store.push_back(str);
- store.push_back(std::cref(str));
- store.push_back(fmt::string_view{str});
- str[0] = 'X';
- auto result = fmt::vformat("{} and {} and {}", store);
- EXPECT_EQ("1234567890 and X234567890 and X234567890", result);
- }
- struct custom_type {
- int i = 0;
- };
- FMT_BEGIN_NAMESPACE
- template <> struct formatter<custom_type> {
- auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
- return ctx.begin();
- }
- template <typename FormatContext>
- auto format(const custom_type& p, FormatContext& ctx) -> decltype(ctx.out()) {
- return format_to(ctx.out(), "cust={}", p.i);
- }
- };
- FMT_END_NAMESPACE
- TEST(args_test, custom_format) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- auto c = custom_type();
- store.push_back(c);
- ++c.i;
- store.push_back(c);
- ++c.i;
- store.push_back(std::cref(c));
- ++c.i;
- auto result = fmt::vformat("{} and {} and {}", store);
- EXPECT_EQ("cust=0 and cust=1 and cust=3", result);
- }
- struct to_stringable {
- friend fmt::string_view to_string_view(to_stringable) { return {}; }
- };
- FMT_BEGIN_NAMESPACE
- template <> struct formatter<to_stringable> {
- auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
- return ctx.begin();
- }
- auto format(to_stringable, format_context& ctx) -> decltype(ctx.out()) {
- return ctx.out();
- }
- };
- FMT_END_NAMESPACE
- TEST(args_test, to_string_and_formatter) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- auto s = to_stringable();
- store.push_back(s);
- store.push_back(std::cref(s));
- fmt::vformat("", store);
- }
- TEST(args_test, named_int) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- store.push_back(fmt::arg("a1", 42));
- EXPECT_EQ("42", fmt::vformat("{a1}", store));
- }
- TEST(args_test, named_strings) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- char str[] = "1234567890";
- store.push_back(fmt::arg("a1", str));
- store.push_back(fmt::arg("a2", std::cref(str)));
- str[0] = 'X';
- EXPECT_EQ("1234567890 and X234567890", fmt::vformat("{a1} and {a2}", store));
- }
- TEST(args_test, named_arg_by_ref) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- char band[] = "Rolling Stones";
- store.push_back(fmt::arg("band", std::cref(band)));
- band[9] = 'c'; // Changing band affects the output.
- EXPECT_EQ(fmt::vformat("{band}", store), "Rolling Scones");
- }
- TEST(args_test, named_custom_format) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- auto c = custom_type();
- store.push_back(fmt::arg("c1", c));
- ++c.i;
- store.push_back(fmt::arg("c2", c));
- ++c.i;
- store.push_back(fmt::arg("c_ref", std::cref(c)));
- ++c.i;
- auto result = fmt::vformat("{c1} and {c2} and {c_ref}", store);
- EXPECT_EQ("cust=0 and cust=1 and cust=3", result);
- }
- TEST(args_test, clear) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- store.push_back(42);
- auto result = fmt::vformat("{}", store);
- EXPECT_EQ("42", result);
- store.push_back(43);
- result = fmt::vformat("{} and {}", store);
- EXPECT_EQ("42 and 43", result);
- store.clear();
- store.push_back(44);
- result = fmt::vformat("{}", store);
- EXPECT_EQ("44", result);
- }
- TEST(args_test, reserve) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- store.reserve(2, 1);
- store.push_back(1.5f);
- store.push_back(fmt::arg("a1", 42));
- auto result = fmt::vformat("{a1} and {}", store);
- EXPECT_EQ("42 and 1.5", result);
- }
- struct copy_throwable {
- copy_throwable() {}
- copy_throwable(const copy_throwable&) { throw "deal with it"; }
- };
- FMT_BEGIN_NAMESPACE
- template <> struct formatter<copy_throwable> {
- auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
- return ctx.begin();
- }
- auto format(copy_throwable, format_context& ctx) -> decltype(ctx.out()) {
- return ctx.out();
- }
- };
- FMT_END_NAMESPACE
- TEST(args_test, throw_on_copy) {
- fmt::dynamic_format_arg_store<fmt::format_context> store;
- store.push_back(std::string("foo"));
- try {
- store.push_back(copy_throwable());
- } catch (...) {
- }
- EXPECT_EQ(fmt::vformat("{}", store), "foo");
- }
- TEST(args_test, move_constructor) {
- using store_type = fmt::dynamic_format_arg_store<fmt::format_context>;
- auto store = std::unique_ptr<store_type>(new store_type());
- store->push_back(42);
- store->push_back(std::string("foo"));
- store->push_back(fmt::arg("a1", "foo"));
- auto moved_store = std::move(*store);
- store.reset();
- EXPECT_EQ(fmt::vformat("{} {} {a1}", moved_store), "42 foo foo");
- }
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