New tests

test/chrono-test.cc

@@ -51,6 +51,7 @@ TEST(chrono_test, format_tm) {
   EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
             "The date is 2016-04-25 11:22:33.");
   EXPECT_EQ(fmt::format("{:%Y}", tm), "2016");
+  EXPECT_EQ(fmt::format("{:%C}", tm), "20");
   EXPECT_EQ(fmt::format("{:%e}", tm), "25");
   EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/16");
   EXPECT_EQ(fmt::format("{:%F}", tm), "2016-04-25");
@@ -72,6 +73,7 @@ TEST(chrono_test, format_tm_future) {
   EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
             "The date is 12345-04-25 11:22:33.");
   EXPECT_EQ(fmt::format("{:%Y}", tm), "12345");
+  EXPECT_EQ(fmt::format("{:%C}", tm), "123");
   EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/45");
   EXPECT_EQ(fmt::format("{:%F}", tm), "12345-04-25");
   EXPECT_EQ(fmt::format("{:%T}", tm), "11:22:33");
@@ -89,6 +91,10 @@ TEST(chrono_test, format_tm_past) {
             "The date is -101-04-25 11:22:33.");
   EXPECT_EQ(fmt::format("{:%Y}", tm), "-101");
 
+  // macOS %C - "-1"
+  // Linux %C - "-2"
+  // EXPECT_EQ(fmt::format("{:%C}", tm), "-1");
+
   // macOS %D - "04/25/01" (%y)
   // Linux %D - "04/25/99" (%y)
   // EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/01");
@@ -160,6 +166,7 @@ TEST(chrono_test, time_point) {
       "%w",  "%Ow", "%u",  "%Ou", "%H",  "%OH", "%I",  "%OI", "%M",  "%OM",
       "%S",  "%OS", "%c",  "%Ec", "%x",  "%Ex", "%X",  "%EX", "%D",  "%F",
       "%r",  "%R",  "%T",  "%p",  "%z",  "%Z"};
+  spec_list.push_back("%Y-%m-%d %H:%M:%S");
   for (const auto& spec : spec_list) {
     auto t = std::chrono::system_clock::to_time_t(t1);
     auto tm = *std::localtime(&t);

test/xchar-test.cc

@@ -8,6 +8,8 @@
 #include "fmt/xchar.h"
 
 #include <complex>
+#include <cwchar>
+#include <vector>
 
 #include "fmt/chrono.h"
 #include "fmt/color.h"
@@ -265,6 +267,30 @@ TEST(xchar_test, chrono) {
   EXPECT_EQ(fmt::format(L"{:%T}", tm), L"11:22:33");
 }
 
+TEST(chrono_test, time_point) {
+  auto t1 = std::chrono::system_clock::now();
+
+  std::vector<std::wstring> spec_list = {
+      L"%%",  L"%n",  L"%t",  L"%Y",  L"%EY", L"%y",  L"%Oy", L"%Ey",
+      L"%C",  L"%EC", L"%G",  L"%g",  L"%b",  L"%h",  L"%B",  L"%m",
+      L"%Om", L"%U",  L"%OU", L"%W",  L"%OW", L"%V",  L"%OV", L"%j",
+      L"%d",  L"%Od", L"%e",  L"%Oe", L"%a",  L"%A",  L"%w",  L"%Ow",
+      L"%u",  L"%Ou", L"%H",  L"%OH", L"%I",  L"%OI", L"%M",  L"%OM",
+      L"%S",  L"%OS", L"%c",  L"%Ec", L"%x",  L"%Ex", L"%X",  L"%EX",
+      L"%D",  L"%F",  L"%r",  L"%R",  L"%T",  L"%p",  L"%z",  L"%Z"};
+  spec_list.push_back(L"%Y-%m-%d %H:%M:%S");
+  for (const auto& spec : spec_list) {
+    auto t = std::chrono::system_clock::to_time_t(t1);
+    auto tm = *std::localtime(&t);
+    wchar_t output[1024] = {};
+    std::wcsftime(output, sizeof(output) / sizeof(wchar_t), spec.c_str(), &tm);
+
+    auto fmt_spec = std::wstring(L"{:").append(spec).append(L"}");
+    EXPECT_EQ(output, fmt::format(fmt_spec, t1));
+    EXPECT_EQ(output, fmt::format(fmt_spec, tm));
+  }
+}
+
 TEST(xchar_test, color) {
   EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), L"rgb(255,20,30) wide"),
             L"\x1b[38;2;255;020;030mrgb(255,20,30) wide\x1b[0m");