Import of CCTZ from GitHub.

PiperOrigin-RevId: 538241594
Change-Id: Ie6f0d913bcf07dea2f33e47198ba952b3800d70e

1 files changed, 15 insertions, 6 deletions

diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
index 4b093b37..38f10f48 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
@@ -1034,16 +1034,16 @@ TEST(MakeTime, SysSecondsLimits) {
     const time_zone cut = LoadZone("libc:UTC");
     const year_t max_tm_year = year_t{std::numeric_limits<int>::max()} + 1900;
     tp = convert(civil_second(max_tm_year, 12, 31, 23, 59, 59), cut);
-#if defined(__FreeBSD__) || defined(__OpenBSD__)
-    // The BSD gmtime_r() fails on extreme positive tm_year values.
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__EMSCRIPTEN__)
+    // Some gmtime_r() impls fail on extreme positive values.
 #else
     EXPECT_EQ("2147485547-12-31T23:59:59+00:00",
               absl::time_internal::cctz::format(RFC3339, tp, cut));
 #endif
     const year_t min_tm_year = year_t{std::numeric_limits<int>::min()} + 1900;
     tp = convert(civil_second(min_tm_year, 1, 1, 0, 0, 0), cut);
-#if defined(__Fuchsia__)
-    // Fuchsia's gmtime_r() fails on extreme negative values (fxbug.dev/78527).
+#if defined(__Fuchsia__) || defined(__EMSCRIPTEN__)
+    // Some gmtime_r() impls fail on extreme negative values (fxbug.dev/78527).
 #else
     EXPECT_EQ("-2147481748-01-01T00:00:00+00:00",
               absl::time_internal::cctz::format(RFC3339, tp, cut));
@@ -1072,7 +1072,7 @@ TEST(MakeTime, LocalTimeLibC) {
          tp = zi.lookup(transition.to).trans) {
       const auto fcl = zi.lookup(transition.from);
       const auto tcl = zi.lookup(transition.to);
-      civil_second cs;  // compare cs in zi and lc
+      civil_second cs, us;  // compare cs and us in zi and lc
       if (fcl.kind == time_zone::civil_lookup::UNIQUE) {
         if (tcl.kind == time_zone::civil_lookup::UNIQUE) {
           // Both unique; must be an is_dst or abbr change.
@@ -1088,12 +1088,14 @@ TEST(MakeTime, LocalTimeLibC) {
         }
         ASSERT_EQ(time_zone::civil_lookup::REPEATED, tcl.kind);
         cs = transition.to;
+        us = transition.from;
       } else {
         ASSERT_EQ(time_zone::civil_lookup::UNIQUE, tcl.kind);
         ASSERT_EQ(time_zone::civil_lookup::SKIPPED, fcl.kind);
         cs = transition.from;
+        us = transition.to;
       }
-      if (cs.year() > 2037) break;  // limit test time (and to 32-bit time_t)
+      if (us.year() > 2037) break;  // limit test time (and to 32-bit time_t)
       const auto cl_zi = zi.lookup(cs);
       if (zi.lookup(cl_zi.pre).is_dst == zi.lookup(cl_zi.post).is_dst) {
         // The "libc" implementation cannot correctly classify transitions
@@ -1125,6 +1127,13 @@ TEST(MakeTime, LocalTimeLibC) {
       EXPECT_EQ(cl_zi.pre, cl_lc.pre);
       EXPECT_EQ(cl_zi.trans, cl_lc.trans);
       EXPECT_EQ(cl_zi.post, cl_lc.post);
+      const auto ucl_zi = zi.lookup(us);
+      const auto ucl_lc = lc.lookup(us);
+      SCOPED_TRACE(testing::Message() << "For " << us << " in " << *np);
+      EXPECT_EQ(ucl_zi.kind, ucl_lc.kind);
+      EXPECT_EQ(ucl_zi.pre, ucl_lc.pre);
+      EXPECT_EQ(ucl_zi.trans, ucl_lc.trans);
+      EXPECT_EQ(ucl_zi.post, ucl_lc.post);
     }
   }
   if (ep == nullptr) {