From fbd92183841633507f71eb305824c6d5c0edf215 Mon Sep 17 00:00:00 2001
From: Christian Schwarz <cmrs@cmrs.io>
Date: Sat, 29 Jul 2023 14:15:47 +0200
Subject: [PATCH] dd regression tests for #236

---
 src/slice/tests.rs | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/slice/tests.rs b/src/slice/tests.rs
index edcb7a6c..feb2584b 100644
--- a/src/slice/tests.rs
+++ b/src/slice/tests.rs
@@ -75,6 +75,31 @@ fn copying() {
 	}
 }
 
+// regression tests for #236
+#[test]
+fn copy_within_supports_empty_ranges() {
+	let empty = bits![mut u8, Lsb0; 0; 0];
+	empty.copy_within(0..0, 0);
+	assert_eq!(empty, bits![]);
+
+	let non_empty = bits![mut u8, Lsb0; 0; 3];
+	non_empty.copy_within(2..2, 0);
+	assert_eq!(non_empty, bits![0, 0, 0]);
+}
+#[test]
+#[should_panic]
+fn copy_within_panics_if_empty_range_exceeds_bounds() {
+	let empty_slice = bits![mut u8, Lsb0; 0; 0];
+	empty_slice.copy_within(2..2, 0);
+}
+#[test]
+#[should_panic]
+fn copy_within_panics_if_dest_for_empty_range_exceeds_bounds() {
+	let empty_slice = bits![mut u8, Lsb0; 0; 0];
+	empty_slice.copy_within(0..0, 1);
+}
+
+
 #[test]
 fn writing() {
 	let bits = bits![mut 0; 2];