zcoord: test iter()

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

diff --git a/base/zcoord.rs b/base/zcoord.rs
index 610b5ce5227cc4c3246d57a7b90c0dee6968f8cf..37b38505fe3737eeb90b8941f9f2d5a98f284fe5 100644 (file)
--- a/base/zcoord.rs
+++ b/base/zcoord.rs
@@ -884,7 +884,13 @@ mod test {
 
   #[test]
   fn iter() {
-    
+    let mut m = mk("000000000a").iter(Increment);
+    assert_eq!( m.next(), Some(bf("000100000a")) );
+    assert_eq!( m.next(), Some(bf("000200000a")) );
+
+    let mut m = mk("000000000a").iter(Decrement);
+    assert_eq!( m.next(), Some(bf("0000000009_vvvvvvvvvv_vvvuvvvvvv")) );
+    assert_eq!( m.next(), Some(bf("0000000009_vvvvvvvvvv_vvvtvvvvvv")) );
   }
 
   #[test]