proxy/tests/proxy_fmt_format_tests.cpp at 8add62f5ce79a9fe382441b2b0dc42cbd9f200b2 · mingxwa/proxy · GitHub

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// Copyright (c) 2022-2026 Microsoft Corporation.
// Copyright (c) 2026-Present Next Gen C++ Foundation.
// Licensed under the MIT License.

#include <gtest/gtest.h>

#include <fmt/format.h>
#include <fmt/xchar.h>
#include <proxy/proxy.h>
#include <proxy/proxy_fmt.h>

namespace proxy_fmt_format_tests_details {

struct NonFormattable : pro::facade_builder::build {};

static_assert(
    !std::is_default_constructible_v<
        fmt::formatter<pro::proxy_indirect_accessor<NonFormattable>, char>>);
static_assert(
    !std::is_default_constructible_v<
        fmt::formatter<pro::proxy_indirect_accessor<NonFormattable>, wchar_t>>);

struct Formattable : pro::facade_builder                   //
                     ::add_skill<pro::skills::fmt_format>  //
                     ::add_skill<pro::skills::fmt_wformat> //
                     ::build {};

static_assert(std::is_default_constructible_v<
              fmt::formatter<pro::proxy_indirect_accessor<Formattable>, char>>);
static_assert(
    std::is_default_constructible_v<
        fmt::formatter<pro::proxy_indirect_accessor<Formattable>, wchar_t>>);

} // namespace proxy_fmt_format_tests_details

namespace details = proxy_fmt_format_tests_details;

TEST(ProxyFmtFormatTests, TestFormat) {
  int v = 123;
  pro::proxy<details::Formattable> p = &v;
  ASSERT_EQ(fmt::format("{}", *p), "123");
  ASSERT_EQ(fmt::format("{:*<6}", *p), "123***");
}

TEST(ProxyFmtFormatTests, TestWformat) {
  int v = 123;
  pro::proxy<details::Formattable> p = &v;
  ASSERT_EQ(fmt::format(L"{}", *p), L"123");
  ASSERT_EQ(fmt::format(L"{:*<6}", *p), L"123***");
}