1 files changed, 236 insertions, 0 deletions
diff --git a/src/seastar/fmt/test/format-impl-test.cc b/src/seastar/fmt/test/format-impl-test.cc
new file mode 100644
index 00000000..f4d75aae
--- /dev/null
+++ b/src/seastar/fmt/test/format-impl-test.cc
@@ -0,0 +1,236 @@
+// Formatting library for C++ - formatting library implementation tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#define FMT_NOEXCEPT
+#undef FMT_SHARED
+#include "test-assert.h"
+
+// Include format.cc instead of format.h to test implementation.
+#include "../src/format.cc"
+#include "fmt/color.h"
+#include "fmt/printf.h"
+
+#include <algorithm>
+#include <cstring>
+
+#include "gmock.h"
+#include "gtest-extra.h"
+#include "util.h"
+
+#undef min
+#undef max
+
+#if FMT_HAS_CPP_ATTRIBUTE(noreturn)
+# define FMT_NORETURN [[noreturn]]
+#else
+# define FMT_NORETURN
+#endif
+
+using fmt::internal::fp;
+
+template <bool is_iec559>
+void test_construct_from_double() {
+  fmt::print("warning: double is not IEC559, skipping FP tests\n");
+}
+
+template <>
+void test_construct_from_double<true>() {
+  auto v = fp(1.23);
+  EXPECT_EQ(v.f, 0x13ae147ae147aeu);
+  EXPECT_EQ(v.e, -52);
+}
+
+TEST(FPTest, ConstructFromDouble) {
+  test_construct_from_double<std::numeric_limits<double>::is_iec559>();
+}
+
+TEST(FPTest, Normalize) {
+  auto v = fp(0xbeef, 42);
+  v.normalize();
+  EXPECT_EQ(0xbeef000000000000, v.f);
+  EXPECT_EQ(-6, v.e);
+}
+
+TEST(FPTest, ComputeBoundariesSubnormal) {
+  auto v = fp(0xbeef, 42);
+  fp lower, upper;
+  v.compute_boundaries(lower, upper);
+  EXPECT_EQ(0xbeee800000000000, lower.f);
+  EXPECT_EQ(-6, lower.e);
+  EXPECT_EQ(0xbeef800000000000, upper.f);
+  EXPECT_EQ(-6, upper.e);
+}
+
+TEST(FPTest, ComputeBoundaries) {
+  auto v = fp(0x10000000000000, 42);
+  fp lower, upper;
+  v.compute_boundaries(lower, upper);
+  EXPECT_EQ(0x7ffffffffffffe00, lower.f);
+  EXPECT_EQ(31, lower.e);
+  EXPECT_EQ(0x8000000000000400, upper.f);
+  EXPECT_EQ(31, upper.e);
+}
+
+TEST(FPTest, Subtract) {
+  auto v = fp(123, 1) - fp(102, 1);
+  EXPECT_EQ(v.f, 21u);
+  EXPECT_EQ(v.e, 1);
+}
+
+TEST(FPTest, Multiply) {
+  auto v = fp(123ULL << 32, 4) * fp(56ULL << 32, 7);
+  EXPECT_EQ(v.f, 123u * 56u);
+  EXPECT_EQ(v.e, 4 + 7 + 64);
+  v = fp(123ULL << 32, 4) * fp(567ULL << 31, 8);
+  EXPECT_EQ(v.f, (123 * 567 + 1u) / 2);
+  EXPECT_EQ(v.e, 4 + 8 + 64);
+}
+
+TEST(FPTest, GetCachedPower) {
+  typedef std::numeric_limits<double> limits;
+  for (auto exp = limits::min_exponent; exp <= limits::max_exponent; ++exp) {
+    int dec_exp = 0;
+    auto fp = fmt::internal::get_cached_power(exp, dec_exp);
+    EXPECT_LE(exp, fp.e);
+    int dec_exp_step = 8;
+    EXPECT_LE(fp.e, exp + dec_exp_step * log2(10));
+    EXPECT_DOUBLE_EQ(pow(10, dec_exp), ldexp(fp.f, fp.e));
+  }
+}
+
+TEST(FPTest, Grisu2FormatCompilesWithNonIEEEDouble) {
+  fmt::memory_buffer buf;
+  grisu2_format(4.2f, buf, fmt::core_format_specs());
+}
+
+template <typename T>
+struct ValueExtractor: fmt::internal::function<T> {
+  T operator()(T value) {
+    return value;
+  }
+
+  template <typename U>
+  FMT_NORETURN T operator()(U) {
+    throw std::runtime_error(fmt::format("invalid type {}", typeid(U).name()));
+  }
+};
+
+TEST(FormatTest, ArgConverter) {
+  long long value = std::numeric_limits<long long>::max();
+  auto arg = fmt::internal::make_arg<fmt::format_context>(value);
+  visit(fmt::internal::arg_converter<long long, fmt::format_context>(arg, 'd'),
+        arg);
+  EXPECT_EQ(value, visit(ValueExtractor<long long>(), arg));
+}
+
+TEST(FormatTest, FormatNegativeNaN) {
+  double nan = std::numeric_limits<double>::quiet_NaN();
+  if (std::signbit(-nan))
+    EXPECT_EQ("-nan", fmt::format("{}", -nan));
+  else
+    fmt::print("Warning: compiler doesn't handle negative NaN correctly");
+}
+
+TEST(FormatTest, StrError) {
+  char *message = FMT_NULL;
+  char buffer[BUFFER_SIZE];
+  EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = FMT_NULL, 0),
+                "invalid buffer");
+  EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = buffer, 0),
+                "invalid buffer");
+  buffer[0] = 'x';
+#if defined(_GNU_SOURCE) && !defined(__COVERITY__)
+  // Use invalid error code to make sure that safe_strerror returns an error
+  // message in the buffer rather than a pointer to a static string.
+  int error_code = -1;
+#else
+  int error_code = EDOM;
+#endif
+
+  int result = fmt::safe_strerror(error_code, message = buffer, BUFFER_SIZE);
+  EXPECT_EQ(result, 0);
+  std::size_t message_size = std::strlen(message);
+  EXPECT_GE(BUFFER_SIZE - 1u, message_size);
+  EXPECT_EQ(get_system_error(error_code), message);
+
+  // safe_strerror never uses buffer on MinGW.
+#ifndef __MINGW32__
+  result = fmt::safe_strerror(error_code, message = buffer, message_size);
+  EXPECT_EQ(ERANGE, result);
+  result = fmt::safe_strerror(error_code, message = buffer, 1);
+  EXPECT_EQ(buffer, message);  // Message should point to buffer.
+  EXPECT_EQ(ERANGE, result);
+  EXPECT_STREQ("", message);
+#endif
+}
+
+TEST(FormatTest, FormatErrorCode) {
+  std::string msg = "error 42", sep = ": ";
+  {
+    fmt::memory_buffer buffer;
+    format_to(buffer, "garbage");
+    fmt::format_error_code(buffer, 42, "test");
+    EXPECT_EQ("test: " + msg, to_string(buffer));
+  }
+  {
+    fmt::memory_buffer buffer;
+    std::string prefix(
+        fmt::inline_buffer_size - msg.size() - sep.size() + 1, 'x');
+    fmt::format_error_code(buffer, 42, prefix);
+    EXPECT_EQ(msg, to_string(buffer));
+  }
+  int codes[] = {42, -1};
+  for (std::size_t i = 0, n = sizeof(codes) / sizeof(*codes); i < n; ++i) {
+    // Test maximum buffer size.
+    msg = fmt::format("error {}", codes[i]);
+    fmt::memory_buffer buffer;
+    std::string prefix(
+        fmt::inline_buffer_size - msg.size() - sep.size(), 'x');
+    fmt::format_error_code(buffer, codes[i], prefix);
+    EXPECT_EQ(prefix + sep + msg, to_string(buffer));
+    std::size_t size = fmt::inline_buffer_size;
+    EXPECT_EQ(size, buffer.size());
+    buffer.resize(0);
+    // Test with a message that doesn't fit into the buffer.
+    prefix += 'x';
+    fmt::format_error_code(buffer, codes[i], prefix);
+    EXPECT_EQ(msg, to_string(buffer));
+  }
+}
+
+TEST(FormatTest, CountCodePoints) {
+  EXPECT_EQ(4, fmt::internal::count_code_points(fmt::u8string_view("ёжик")));
+}
+
+TEST(ColorsTest, Colors) {
+  EXPECT_WRITE(stdout, fmt::print(fg(fmt::rgb(255, 20, 30)), "rgb(255,20,30)"),
+               "\x1b[38;2;255;020;030mrgb(255,20,30)\x1b[0m");
+  EXPECT_WRITE(stdout, fmt::print(fg(fmt::color::blue), "blue"),
+               "\x1b[38;2;000;000;255mblue\x1b[0m");
+  EXPECT_WRITE(
+      stdout,
+      fmt::print(fg(fmt::color::blue) | bg(fmt::color::red), "two color"),
+      "\x1b[38;2;000;000;255m\x1b[48;2;255;000;000mtwo color\x1b[0m");
+  EXPECT_WRITE(stdout, fmt::print(fmt::emphasis::bold, "bold"),
+               "\x1b[1mbold\x1b[0m");
+  EXPECT_WRITE(stdout, fmt::print(fmt::emphasis::italic, "italic"),
+               "\x1b[3mitalic\x1b[0m");
+  EXPECT_WRITE(stdout, fmt::print(fmt::emphasis::underline, "underline"),
+               "\x1b[4munderline\x1b[0m");
+  EXPECT_WRITE(stdout,
+               fmt::print(fmt::emphasis::strikethrough, "strikethrough"),
+               "\x1b[9mstrikethrough\x1b[0m");
+  EXPECT_WRITE(
+      stdout,
+      fmt::print(fg(fmt::color::blue) | fmt::emphasis::bold, "blue/bold"),
+      "\x1b[1m\x1b[38;2;000;000;255mblue/bold\x1b[0m");
+  EXPECT_WRITE(stderr, fmt::print(stderr, fmt::emphasis::bold, "bold error"),
+               "\x1b[1mbold error\x1b[0m");
+  EXPECT_WRITE(stderr, fmt::print(stderr, fg(fmt::color::blue), "blue log"),
+                 "\x1b[38;2;000;000;255mblue log\x1b[0m");
+  EXPECT_WRITE(stdout, fmt::print(fmt::text_style(), "hi"), "hi");
+}