Fix local_time test

Author: vitaut

test/chrono-test.cc

@@ -375,16 +375,12 @@ TEST(chrono_test, local_time) {
 #endif
   specs.push_back("%Y-%m-%d %H:%M:%S");
 
-#if FMT_USE_LOCAL_TIME
 #  ifdef _WIN32
   return;  // Not supported on Windows.
 #  endif
 
   for (const auto& spec : specs) {
-    auto sys_time = std::chrono::system_clock::to_time_t(
-        std::chrono::current_zone()->to_sys(t));
-    auto tm = *std::localtime(&sys_time);
-
+    auto tm = fmt::gmtime(t.time_since_epoch().count());
     auto sys_output = system_strftime(spec, &tm);
 
     auto fmt_spec = fmt::format("{{:{}}}", spec);
@@ -393,10 +389,7 @@ TEST(chrono_test, local_time) {
   }
 
   if (std::find(specs.cbegin(), specs.cend(), "%z") != specs.cend()) {
-    auto sys_time = std::chrono::system_clock::to_time_t(
-        std::chrono::current_zone()->to_sys(t));
-    auto tm = *std::localtime(&sys_time);
-
+    auto tm = fmt::gmtime(t.time_since_epoch().count());
     auto sys_output = system_strftime("%z", &tm);
     sys_output.insert(sys_output.end() - 2, 1, ':');
 
@@ -406,7 +399,6 @@ TEST(chrono_test, local_time) {
     EXPECT_EQ(sys_output, fmt::format("{:%Oz}", t));
     EXPECT_EQ(sys_output, fmt::format("{:%Oz}", tm));
   }
-#endif  // FMT_USE_LOCAL_TIME
 }
 
 TEST(chrono_test, daylight_savings_time_end) {