Fix to_string(time_t) and write a unit test for it

1 files changed, 5 insertions, 4 deletions

diff --git a/louloulibs/utils/time.cpp b/louloulibs/utils/time.cpp
index e23def4..b85d764 100644
--- a/louloulibs/utils/time.cpp
+++ b/louloulibs/utils/time.cpp
@@ -4,9 +4,10 @@ namespace utils
 {
 std::string to_string(const std::time_t& timestamp)
 {
-    constexpr std::size_t stamp_size = 20;
-    char date_buf[stamp_size];
-    std::strftime(date_buf, stamp_size, "%FT%TZ", std::gmtime(&timestamp));
-    return {std::begin(date_buf), std::end(date_buf)};
+  constexpr std::size_t stamp_size = 21;
+  char date_buf[stamp_size];
+  if (std::strftime(date_buf, stamp_size, "%FT%TZ", std::gmtime(&timestamp)) != stamp_size - 1)
+    return "";
+  return {std::begin(date_buf), std::end(date_buf) - 1};
 }
 }
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