Add test for unblamed hunk enclosing deletion

Author: cruessler

gix-blame/tests/blame.rs

@@ -1653,6 +1653,42 @@ fn process_change_works_enclosing_addition() {
     assert_eq!(offset_in_destination, Offset::Added(3));
 }
 
+#[test]
+fn process_change_works_enclosing_deletion() {
+    let mut lines_blamed: Vec<BlameEntry> = vec![];
+    let mut new_hunks_to_blame: Vec<UnblamedHunk> = vec![];
+    let mut offset_in_destination: Offset = Offset::Added(3);
+    let suspect = ObjectId::null(gix_hash::Kind::Sha1);
+
+    let (hunk, change) = process_change(
+        &mut lines_blamed,
+        &mut new_hunks_to_blame,
+        &mut offset_in_destination,
+        suspect,
+        // range_in_destination: 13..20
+        Some(UnblamedHunk::new(12..19, Offset::Deleted(1))),
+        Some(Change::Deleted(15, 2)),
+    );
+
+    assert_eq!(
+        hunk,
+        Some(UnblamedHunk {
+            range_in_blamed_file: 14..19,
+            range_in_destination: 15..20
+        })
+    );
+    assert_eq!(change, None);
+    assert_eq!(lines_blamed, vec![]);
+    assert_eq!(
+        new_hunks_to_blame,
+        vec![UnblamedHunk {
+            range_in_blamed_file: 12..14,
+            range_in_destination: 10..12
+        }]
+    );
+    assert_eq!(offset_in_destination, Offset::Added(1));
+}
+
 #[test]
 fn process_change_works_enclosing_unchanged_lines() {
     let mut lines_blamed: Vec<BlameEntry> = vec![];