Improve local_time test

Author: vitaut

test/chrono-test.cc

@@ -358,8 +358,7 @@ TEST(chrono_test, local_time) {
   EXPECT_EQ(fmt::format("{:}", time), "1979-03-12 12:00:00");
 
   std::vector<std::string> specs = {
-      "%%",  "%n",  "%t",  "%Y",  "%EY", "%y",  "%Oy", "%Ey", "%C",
-      "%EC", "%G",  "%g",  "%b",  "%h",  "%B",  "%m",  "%Om", "%U",
+      "%m",  "%Om", "%U",
       "%OU", "%W",  "%OW", "%V",  "%OV", "%j",  "%d",  "%Od", "%e",
       "%Oe", "%a",  "%A",  "%w",  "%Ow", "%u",  "%Ou", "%H",  "%OH",
       "%I",  "%OI", "%M",  "%OM", "%S",  "%OS", "%x",  "%Ex", "%X",
@@ -368,12 +367,7 @@ TEST(chrono_test, local_time) {
   // Disabled on Windows because these formats are not consistent among
   // platforms.
   specs.insert(specs.end(), {"%c", "%Ec", "%r"});
-#elif !FMT_HAS_C99_STRFTIME
-  // Only C89 conversion specifiers when using MSVCRT instead of UCRT
-  specs = {"%%", "%Y", "%y", "%b", "%B", "%m", "%U", "%W", "%j", "%d", "%a",
-           "%A", "%w", "%H", "%I", "%M", "%S", "%x", "%X", "%p"};
 #endif
-  specs.push_back("%Y-%m-%d %H:%M:%S");
 
   for (const auto& spec : specs) {
     auto tm = fmt::gmtime(time.time_since_epoch().count());
@@ -382,9 +376,24 @@ TEST(chrono_test, local_time) {
     auto fmt_spec = fmt::format("{{:{}}}", spec);
     EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), time))
         << fmt_spec;
-    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), tm));
   }
 
+  EXPECT_EQ(fmt::format("{:%%}", time), "%");
+  EXPECT_EQ(fmt::format("{:%n}", time), "\n");
+  EXPECT_EQ(fmt::format("{:%t}", time), "\t");
+  EXPECT_EQ(fmt::format("{:%Y}", time), "1979");
+  EXPECT_EQ(fmt::format("{:%EY}", time), "1979");
+  EXPECT_EQ(fmt::format("{:%y}", time), "79");
+  EXPECT_EQ(fmt::format("{:%Oy}", time), "79");
+  EXPECT_EQ(fmt::format("{:%Ey}", time), "79");
+  EXPECT_EQ(fmt::format("{:%C}", time), "19");
+  EXPECT_EQ(fmt::format("{:%EC}", time), "19");
+  EXPECT_EQ(fmt::format("{:%G}", time), "1979");
+  EXPECT_EQ(fmt::format("{:%g}", time), "79");
+  EXPECT_EQ(fmt::format("{:%b}", time), "Mar");
+  EXPECT_EQ(fmt::format("{:%h}", time), "Mar");
+  EXPECT_EQ(fmt::format("{:%B}", time), "March");
+
   EXPECT_THROW_MSG((void)fmt::format(fmt::runtime("{:%z}"), time),
                    fmt::format_error, "no timezone");
   EXPECT_THROW_MSG((void)fmt::format(fmt::runtime("{:%Z}"), time),