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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 fmt::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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