mirror of
https://github.com/fmtlib/fmt.git
synced 2024-11-19 20:18:49 +00:00
360 lines
13 KiB
C++
360 lines
13 KiB
C++
// Formatting library for C++ - formatting library tests
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#include "fmt/compile.h"
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#include <type_traits>
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#include "fmt/chrono.h"
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#include "gmock/gmock.h"
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#include "gtest-extra.h"
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TEST(iterator_test, counting_iterator) {
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auto it = fmt::detail::counting_iterator();
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auto prev = it++;
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EXPECT_EQ(prev.count(), 0);
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EXPECT_EQ(it.count(), 1);
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EXPECT_EQ((it + 41).count(), 42);
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}
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TEST(iterator_test, truncating_iterator) {
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char* p = nullptr;
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auto it = fmt::detail::truncating_iterator<char*>(p, 3);
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auto prev = it++;
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EXPECT_EQ(prev.base(), p);
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EXPECT_EQ(it.base(), p + 1);
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}
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TEST(iterator_test, truncating_iterator_default_construct) {
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auto it = fmt::detail::truncating_iterator<char*>();
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EXPECT_EQ(nullptr, it.base());
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EXPECT_EQ(std::size_t{0}, it.count());
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}
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#ifdef __cpp_lib_ranges
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TEST(iterator_test, truncating_iterator_is_output_iterator) {
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static_assert(
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std::output_iterator<fmt::detail::truncating_iterator<char*>, char>);
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}
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#endif
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TEST(iterator_test, truncating_back_inserter) {
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auto buffer = std::string();
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auto bi = std::back_inserter(buffer);
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auto it = fmt::detail::truncating_iterator<decltype(bi)>(bi, 2);
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*it++ = '4';
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*it++ = '2';
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*it++ = '1';
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EXPECT_EQ(buffer.size(), 2);
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EXPECT_EQ(buffer, "42");
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}
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TEST(compile_test, compile_fallback) {
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// FMT_COMPILE should fallback on runtime formatting when `if constexpr` is
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// not available.
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
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}
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#ifdef __cpp_if_constexpr
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struct test_formattable {};
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FMT_BEGIN_NAMESPACE
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template <> struct formatter<test_formattable> : formatter<const char*> {
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char word_spec = 'f';
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constexpr auto parse(format_parse_context& ctx) {
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auto it = ctx.begin(), end = ctx.end();
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if (it == end || *it == '}') return it;
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if (it != end && (*it == 'f' || *it == 'b')) word_spec = *it++;
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if (it != end && *it != '}') throw format_error("invalid format");
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return it;
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}
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template <typename FormatContext>
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constexpr auto format(test_formattable, FormatContext& ctx) const
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-> decltype(ctx.out()) {
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return formatter<const char*>::format(word_spec == 'f' ? "foo" : "bar",
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ctx);
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}
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};
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FMT_END_NAMESPACE
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TEST(compile_test, format_default) {
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42u));
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42ll));
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42ull));
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EXPECT_EQ("true", fmt::format(FMT_COMPILE("{}"), true));
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EXPECT_EQ("x", fmt::format(FMT_COMPILE("{}"), 'x'));
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EXPECT_EQ("4.2", fmt::format(FMT_COMPILE("{}"), 4.2));
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EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), "foo"));
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EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), std::string("foo")));
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EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), test_formattable()));
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auto t = std::chrono::system_clock::now();
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EXPECT_EQ(fmt::format("{}", t), fmt::format(FMT_COMPILE("{}"), t));
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# ifdef __cpp_lib_byte
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), std::byte{42}));
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# endif
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}
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TEST(compile_test, format_wide_string) {
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EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{}"), 42));
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}
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TEST(compile_test, format_specs) {
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{:x}"), 0x42));
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EXPECT_EQ("1.2 ms ",
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fmt::format(FMT_COMPILE("{:7.1%Q %q}"),
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std::chrono::duration<double, std::milli>(1.234)));
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}
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TEST(compile_test, dynamic_format_specs) {
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EXPECT_EQ("foo ", fmt::format(FMT_COMPILE("{:{}}"), "foo", 5));
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EXPECT_EQ(" 3.14", fmt::format(FMT_COMPILE("{:{}.{}f}"), 3.141592, 6, 2));
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EXPECT_EQ(
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"=1.234ms=",
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fmt::format(FMT_COMPILE("{:=^{}.{}}"),
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std::chrono::duration<double, std::milli>(1.234), 9, 3));
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}
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TEST(compile_test, manual_ordering) {
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{0}"), 42));
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EXPECT_EQ(" -42", fmt::format(FMT_COMPILE("{0:4}"), -42));
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EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{0} {1}"), 41, 43));
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EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{1} {0}"), 43, 41));
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EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{0} {2}"), 41, 42, 43));
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EXPECT_EQ(" 41 43", fmt::format(FMT_COMPILE("{1:{2}} {0:4}"), 43, 41, 4));
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EXPECT_EQ("42 1.2 ms ",
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fmt::format(FMT_COMPILE("{0} {1:7.1%Q %q}"), 42,
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std::chrono::duration<double, std::milli>(1.234)));
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EXPECT_EQ(
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"true 42 42 foo 0x1234 foo",
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fmt::format(FMT_COMPILE("{0} {1} {2} {3} {4} {5}"), true, 42, 42.0f,
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"foo", reinterpret_cast<void*>(0x1234), test_formattable()));
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EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{0}"), 42));
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}
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TEST(compile_test, named) {
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auto runtime_named_field_compiled =
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fmt::detail::compile<decltype(fmt::arg("arg", 42))>(FMT_COMPILE("{arg}"));
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static_assert(std::is_same_v<decltype(runtime_named_field_compiled),
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fmt::detail::runtime_named_field<char>>);
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EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), fmt::arg("arg", 42)));
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EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{} {}"), fmt::arg("arg", 41),
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fmt::arg("arg", 43)));
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EXPECT_EQ("foobar",
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fmt::format(FMT_COMPILE("{a0}{a1}"), fmt::arg("a0", "foo"),
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fmt::arg("a1", "bar")));
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EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{}{a1}"), fmt::arg("a0", "foo"),
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fmt::arg("a1", "bar")));
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EXPECT_EQ("foofoo", fmt::format(FMT_COMPILE("{a0}{}"), fmt::arg("a0", "foo"),
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fmt::arg("a1", "bar")));
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EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{0}{a1}"), fmt::arg("a0", "foo"),
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fmt::arg("a1", "bar")));
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EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{a0}{1}"), fmt::arg("a0", "foo"),
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fmt::arg("a1", "bar")));
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EXPECT_EQ("foobar",
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fmt::format(FMT_COMPILE("{}{a1}"), "foo", fmt::arg("a1", "bar")));
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EXPECT_EQ("foobar",
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fmt::format(FMT_COMPILE("{a0}{a1}"), fmt::arg("a1", "bar"),
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fmt::arg("a2", "baz"), fmt::arg("a0", "foo")));
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EXPECT_EQ(" bar foo ",
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fmt::format(FMT_COMPILE(" {foo} {bar} "), fmt::arg("foo", "bar"),
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fmt::arg("bar", "foo")));
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EXPECT_THROW(fmt::format(FMT_COMPILE("{invalid}"), fmt::arg("valid", 42)),
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fmt::format_error);
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# if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
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using namespace fmt::literals;
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auto statically_named_field_compiled =
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fmt::detail::compile<decltype("arg"_a = 42)>(FMT_COMPILE("{arg}"));
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static_assert(std::is_same_v<decltype(statically_named_field_compiled),
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fmt::detail::field<char, int, 0>>);
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EXPECT_EQ("41 43",
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fmt::format(FMT_COMPILE("{a0} {a1}"), "a0"_a = 41, "a1"_a = 43));
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EXPECT_EQ("41 43",
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fmt::format(FMT_COMPILE("{a1} {a0}"), "a0"_a = 43, "a1"_a = 41));
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# endif
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}
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TEST(compile_test, format_to) {
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char buf[8];
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auto end = fmt::format_to(buf, FMT_COMPILE("{}"), 42);
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*end = '\0';
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EXPECT_STREQ("42", buf);
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end = fmt::format_to(buf, FMT_COMPILE("{:x}"), 42);
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*end = '\0';
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EXPECT_STREQ("2a", buf);
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}
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TEST(compile_test, format_to_n) {
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constexpr auto buffer_size = 8;
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char buffer[buffer_size];
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auto res = fmt::format_to_n(buffer, buffer_size, FMT_COMPILE("{}"), 42);
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*res.out = '\0';
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EXPECT_STREQ("42", buffer);
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res = fmt::format_to_n(buffer, buffer_size, FMT_COMPILE("{:x}"), 42);
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*res.out = '\0';
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EXPECT_STREQ("2a", buffer);
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}
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TEST(compile_test, formatted_size) {
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EXPECT_EQ(2, fmt::formatted_size(FMT_COMPILE("{0}"), 42));
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EXPECT_EQ(5, fmt::formatted_size(FMT_COMPILE("{0:<4.2f}"), 42.0));
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}
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TEST(compile_test, text_and_arg) {
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EXPECT_EQ(">>>42<<<", fmt::format(FMT_COMPILE(">>>{}<<<"), 42));
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EXPECT_EQ("42!", fmt::format(FMT_COMPILE("{}!"), 42));
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}
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TEST(compile_test, unknown_format_fallback) {
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EXPECT_EQ(" 42 ",
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fmt::format(FMT_COMPILE("{name:^4}"), fmt::arg("name", 42)));
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std::vector<char> v;
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fmt::format_to(std::back_inserter(v), FMT_COMPILE("{name:^4}"),
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fmt::arg("name", 42));
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EXPECT_EQ(" 42 ", fmt::string_view(v.data(), v.size()));
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char buffer[4];
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auto result = fmt::format_to_n(buffer, 4, FMT_COMPILE("{name:^5}"),
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fmt::arg("name", 42));
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EXPECT_EQ(5u, result.size);
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EXPECT_EQ(buffer + 4, result.out);
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EXPECT_EQ(" 42 ", fmt::string_view(buffer, 4));
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}
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TEST(compile_test, empty) { EXPECT_EQ("", fmt::format(FMT_COMPILE(""))); }
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struct to_stringable {
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friend fmt::string_view to_string_view(to_stringable) { return {}; }
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};
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FMT_BEGIN_NAMESPACE
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template <> struct formatter<to_stringable> {
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auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
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return ctx.begin();
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}
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template <typename FormatContext>
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auto format(const to_stringable&, FormatContext& ctx) -> decltype(ctx.out()) {
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return ctx.out();
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}
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};
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FMT_END_NAMESPACE
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TEST(compile_test, to_string_and_formatter) {
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fmt::format(FMT_COMPILE("{}"), to_stringable());
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}
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TEST(compile_test, print) {
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EXPECT_WRITE(stdout, fmt::print(FMT_COMPILE("Don't {}!"), "panic"),
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"Don't panic!");
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EXPECT_WRITE(stderr, fmt::print(stderr, FMT_COMPILE("Don't {}!"), "panic"),
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"Don't panic!");
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}
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#endif
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#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
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TEST(compile_test, compile_format_string_literal) {
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using namespace fmt::literals;
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EXPECT_EQ("", fmt::format(""_cf));
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EXPECT_EQ("42", fmt::format("{}"_cf, 42));
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EXPECT_EQ(L"42", fmt::format(L"{}"_cf, 42));
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}
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#endif
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#if __cplusplus >= 202002L || \
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(__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
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template <size_t max_string_length, typename Char = char> struct test_string {
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template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
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return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
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}
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Char buffer[max_string_length]{};
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};
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template <size_t max_string_length, typename Char = char, typename... Args>
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consteval auto test_format(auto format, const Args&... args) {
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test_string<max_string_length, Char> string{};
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fmt::format_to(string.buffer, format, args...);
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return string;
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}
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TEST(compile_time_formatting_test, bool) {
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EXPECT_EQ("true", test_format<5>(FMT_COMPILE("{}"), true));
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EXPECT_EQ("false", test_format<6>(FMT_COMPILE("{}"), false));
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EXPECT_EQ("true ", test_format<6>(FMT_COMPILE("{:5}"), true));
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EXPECT_EQ("1", test_format<2>(FMT_COMPILE("{:d}"), true));
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}
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TEST(compile_time_formatting_test, integer) {
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EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), 42));
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EXPECT_EQ("420", test_format<4>(FMT_COMPILE("{}"), 420));
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EXPECT_EQ("42 42", test_format<6>(FMT_COMPILE("{} {}"), 42, 42));
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EXPECT_EQ("42 42",
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test_format<6>(FMT_COMPILE("{} {}"), uint32_t{42}, uint64_t{42}));
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EXPECT_EQ("+42", test_format<4>(FMT_COMPILE("{:+}"), 42));
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EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{:-}"), 42));
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EXPECT_EQ(" 42", test_format<4>(FMT_COMPILE("{: }"), 42));
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EXPECT_EQ("-0042", test_format<6>(FMT_COMPILE("{:05}"), -42));
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EXPECT_EQ("101010", test_format<7>(FMT_COMPILE("{:b}"), 42));
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EXPECT_EQ("0b101010", test_format<9>(FMT_COMPILE("{:#b}"), 42));
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EXPECT_EQ("0B101010", test_format<9>(FMT_COMPILE("{:#B}"), 42));
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EXPECT_EQ("042", test_format<4>(FMT_COMPILE("{:#o}"), 042));
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EXPECT_EQ("0x4a", test_format<5>(FMT_COMPILE("{:#x}"), 0x4a));
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EXPECT_EQ("0X4A", test_format<5>(FMT_COMPILE("{:#X}"), 0x4a));
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EXPECT_EQ(" 42", test_format<6>(FMT_COMPILE("{:5}"), 42));
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EXPECT_EQ(" 42", test_format<6>(FMT_COMPILE("{:5}"), 42ll));
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EXPECT_EQ(" 42", test_format<6>(FMT_COMPILE("{:5}"), 42ull));
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EXPECT_EQ("42 ", test_format<5>(FMT_COMPILE("{:<4}"), 42));
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EXPECT_EQ(" 42", test_format<5>(FMT_COMPILE("{:>4}"), 42));
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EXPECT_EQ(" 42 ", test_format<5>(FMT_COMPILE("{:^4}"), 42));
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EXPECT_EQ("**-42", test_format<6>(FMT_COMPILE("{:*>5}"), -42));
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}
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TEST(compile_time_formatting_test, char) {
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EXPECT_EQ("c", test_format<2>(FMT_COMPILE("{}"), 'c'));
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EXPECT_EQ("c ", test_format<4>(FMT_COMPILE("{:3}"), 'c'));
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EXPECT_EQ("99", test_format<3>(FMT_COMPILE("{:d}"), 'c'));
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}
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TEST(compile_time_formatting_test, string) {
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EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), "42"));
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EXPECT_EQ("The answer is 42",
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test_format<17>(FMT_COMPILE("{} is {}"), "The answer", "42"));
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EXPECT_EQ("abc**", test_format<6>(FMT_COMPILE("{:*<5}"), "abc"));
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EXPECT_EQ("**🤡**", test_format<9>(FMT_COMPILE("{:*^6}"), "🤡"));
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}
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TEST(compile_time_formatting_test, combination) {
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EXPECT_EQ("420, true, answer",
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test_format<18>(FMT_COMPILE("{}, {}, {}"), 420, true, "answer"));
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EXPECT_EQ(" -42", test_format<5>(FMT_COMPILE("{:{}}"), -42, 4));
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}
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TEST(compile_time_formatting_test, custom_type) {
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EXPECT_EQ("foo", test_format<4>(FMT_COMPILE("{}"), test_formattable()));
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EXPECT_EQ("bar", test_format<4>(FMT_COMPILE("{:b}"), test_formattable()));
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}
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TEST(compile_time_formatting_test, multibyte_fill) {
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EXPECT_EQ("жж42", test_format<8>(FMT_COMPILE("{:ж>4}"), 42));
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}
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#endif
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