Fix negative subsec for time_point (#3261)

2023-01-11 11:36:50 -08:00
parent 2c80cedc39
commit 676c2a107e
2 changed files with 17 additions and 22 deletions
@@ -908,4 +908,14 @@ TEST(chrono_test, timestamps_sub_seconds) {
      t10(std::chrono::milliseconds(2000));

  EXPECT_EQ(fmt::format("{:%S}", t10), "02.000");
+
+  {
+    const auto epoch = std::chrono::time_point<std::chrono::system_clock,
+                                               std::chrono::milliseconds>();
+    const auto d = std::chrono::milliseconds(250);
+
+    EXPECT_EQ("59.750", fmt::format("{:%S}", epoch - d));
+    EXPECT_EQ("00.000", fmt::format("{:%S}", epoch));
+    EXPECT_EQ("00.250", fmt::format("{:%S}", epoch + d));
+  }
 }