initial

tests/test_data.rs

@@ -0,0 +1,15 @@
+
+
+
+
+#[test]
+pub fn test_distance() {
+
+
+    let a = [0u8,2,3];
+    let p1 = &a[0];
+    let p2 = &a[2];
+    assert_eq!(x::distance(p1, p2), 2);
+    assert_eq!(x::distance(p2, p1), 2);
+    assert_eq!(x::distance(p1, p1), 0);
+}