From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 17 Jul 2021 11:34:56 +0000 (+0100)
Subject: zcoord tests: Test some bad ranges
X-Git-Tag: otter-0.7.2~50
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=508173f857913d2071166842fe7399a57b91f53a;p=otter.git

zcoord tests: Test some bad ranges

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/base/zcoord.rs b/base/zcoord.rs
index 3d5bdbe4..83f83a66 100644
--- a/base/zcoord.rs
+++ b/base/zcoord.rs
@@ -969,7 +969,22 @@ mod test {
     it.nxt("1g00000000");
     it.nxt("1o00000000");
     assert_eq!(it.i.next(), None);
-  }
+
+    assert_eq!(mk             ("aaaaaaaaaa_vvvvvvvvvv")
+               .range_upto(&mk("aaaaaaaaaa_vvvvvvvvvv"), 4)
+               .unwrap_err(),
+               RangeImpossible::Empty);
+ 
+    assert_eq!(mk             ("0000000001")
+               .range_upto(&mk("0000000001"), 4)
+               .unwrap_err(),
+               RangeImpossible::Empty);
+
+    assert_eq!(mk             ("0000000002")
+               .range_upto(&mk("0000000001"), 4)
+               .unwrap_err(),
+               RangeImpossible::Backwards);
+ }
 
   #[test]
   fn some_range() {