From ae3827c51058752107b49eca278cb2be0f5dd053 Mon Sep 17 00:00:00 2001
From: Scott Driggers <github@msd3.io>
Date: Wed, 22 Dec 2021 14:15:39 -0500
Subject: [PATCH] Add `test_duration_const()`

---
 src/duration.rs | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/src/duration.rs b/src/duration.rs
index 6547c3d82e..af1d73026a 100644
--- a/src/duration.rs
+++ b/src/duration.rs
@@ -791,4 +791,38 @@ mod tests {
             Err(OutOfRangeError(()))
         );
     }
+
+    #[test]
+    fn test_duration_const() {
+        const ONE_WEEK: Duration = Duration::weeks(1);
+        const ONE_DAY: Duration = Duration::days(1);
+        const ONE_HOUR: Duration = Duration::hours(1);
+        const ONE_MINUTE: Duration = Duration::minutes(1);
+        const ONE_SECOND: Duration = Duration::seconds(1);
+        const ONE_MILLI: Duration = Duration::milliseconds(1);
+        const ONE_MICRO: Duration = Duration::microseconds(1);
+        const ONE_NANO: Duration = Duration::nanoseconds(1);
+        let combo: Duration = ONE_WEEK
+            + ONE_DAY
+            + ONE_HOUR
+            + ONE_MINUTE
+            + ONE_SECOND
+            + ONE_MILLI
+            + ONE_MICRO
+            + ONE_NANO;
+
+        assert!(ONE_WEEK != Duration::zero());
+        assert!(ONE_DAY != Duration::zero());
+        assert!(ONE_HOUR != Duration::zero());
+        assert!(ONE_MINUTE != Duration::zero());
+        assert!(ONE_SECOND != Duration::zero());
+        assert!(ONE_MILLI != Duration::zero());
+        assert!(ONE_MICRO != Duration::zero());
+        assert!(ONE_NANO != Duration::zero());
+        assert_eq!(
+            combo,
+            Duration::seconds(86400 * 7 + 86400 + 3600 + 60 + 1)
+                + Duration::nanoseconds(1 + 1_000 + 1_000_000)
+        );
+    }
 }