From 972f617603feb24d3348991fa12483b16e415911 Mon Sep 17 00:00:00 2001
From: Bryce Kwon <bryce@brycekwon.com>
Date: Sat, 7 Nov 2026 13:03:15 -1000
Subject: Check a renamed file's diff leaves the rest out

A new path is diffed across the whole commit so the rename can be
found, and a filter then keeps that path alone. The rename commit
touched one file, so a diff that dropped the filter passed.
---
 tests/t0107-diff.sh | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/tests/t0107-diff.sh b/tests/t0107-diff.sh
index b779890..1f12220 100755
--- a/tests/t0107-diff.sh
+++ b/tests/t0107-diff.sh
@@ -136,7 +136,9 @@ test_expect_success 'stripping the highlight leaves every line intact' '
 '
 
 # The diffstat links a renamed file by its new name, and so does the log of
-# that file, but the old name lies outside a diff limited to the new one.
+# that file, but the old name lies outside a diff limited to the new one. That
+# diff runs over the whole commit to find the rename, so the commit changes
+# another file as well, which the limit still has to leave out.
 test_expect_success 'set up a renamed file' '
 	mkrepo repos/moved 1 &&
 	(
@@ -145,27 +147,32 @@ test_expect_success 'set up a renamed file' '
 		git add old.txt &&
 		git commit -m "add old.txt" &&
 		git mv old.txt new.txt &&
-		git commit -m "rename old.txt"
+		echo changed >file-1 &&
+		git commit -am "rename old.txt"
 	) &&
 	cgitrc_repo movedrc moved
 '
 
-test_expect_success 'the diff of a renamed file shows the rename' '
-	cgit_rc movedrc "url=moved/diff/new.txt" >tmp &&
+test_expect_success 'the diff of a renamed file shows the rename alone' '
+	cgit_ok movedrc "url=moved/diff/new.txt" >tmp &&
 	grep "diff --git a/old.txt b/new.txt" tmp &&
 	grep "</a> (renamed from old.txt)</td>" tmp &&
-	! grep "new file mode" tmp
+	grep "<div class=.diffstat-summary.>1 file changed, 0 insertions, 0 deletions</div>" tmp &&
+	! grep "new file mode" tmp &&
+	! grep "a/file-1 b/file-1" tmp
 '
 
 test_expect_success 'so does the commit page limited to the new name' '
-	cgit_rc movedrc "url=moved/commit/new.txt" >tmp &&
+	cgit_ok movedrc "url=moved/commit/new.txt" >tmp &&
 	grep "diff --git a/old.txt b/new.txt" tmp &&
-	! grep "new file mode" tmp
+	grep "<div class=.diffstat-summary.>1 file changed, 0 insertions, 0 deletions</div>" tmp &&
+	! grep "new file mode" tmp &&
+	! grep "a/file-1 b/file-1" tmp
 '
 
 test_expect_success 'a file added outright still shows as new' '
 	added=$(git -C repos/moved rev-parse HEAD~1) &&
-	cgit_rc movedrc "url=moved/diff/old.txt&id=$added" >tmp &&
+	cgit_ok movedrc "url=moved/diff/old.txt&id=$added" >tmp &&
 	grep "new file mode 100644" tmp &&
 	grep "<div class=.add.>+10</div>" tmp
 '
-- 
cgit 2.12.1