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// Formatting library for C++ - dynamic argument store tests

// 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) -> decltype(ctx.begin()) {

return ctx.begin();

}

template <typename FormatContext>

auto format(const custom_type& p, FormatContext& ctx) const

-> 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 auto to_string_view(to_stringable) -> fmt::string_view { return {}; }

};

FMT_BEGIN_NAMESPACE

template <> struct formatter<to_stringable> {

auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {

return ctx.begin();

}

auto format(to_stringable, format_context& ctx) const -> 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("a", 42));

auto result = fmt::vformat("{} and {a}", store);

EXPECT_EQ("1.5 and 42", 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) -> decltype(ctx.begin()) {

return ctx.begin();

}

auto format(copy_throwable, format_context& ctx) const

-> 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");

}

TEST(args_test, size) {

fmt::dynamic_format_arg_store<fmt::format_context> store;

EXPECT_EQ(store.size(), 0);

store.push_back(42);

EXPECT_EQ(store.size(), 1);

store.push_back("Molybdenum");

EXPECT_EQ(store.size(), 2);

store.clear();

EXPECT_EQ(store.size(), 0);

}

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