blame: source/misc/embedded_libs/fmt-8.1.1/test/args-test.cc

// 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");

}