From 5cfcfc64d82365c114afd58d00924fa721eb952a Mon Sep 17 00:00:00 2001
From: Aditya Bhargava <rightaditya@gmail.com>
Date: Tue, 7 Oct 2025 19:27:36 -0400
Subject: [PATCH] Add tests for final prompt having fewer lines than initial
 (transient)

Part of #11911
---
 tests/checks/tmux-transient-prompt.fish | 33 +++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tests/checks/tmux-transient-prompt.fish b/tests/checks/tmux-transient-prompt.fish
index f30593c72..f1ab4f1cc 100644
--- a/tests/checks/tmux-transient-prompt.fish
+++ b/tests/checks/tmux-transient-prompt.fish
@@ -53,3 +53,36 @@ isolated-tmux capture-pane -p
 # CHECK: final line2
 # CHECK: transient line1
 # CHECK: transient line2
+
+# Test that multi-line initial prompt is properly cleared with single-line
+# final.
+isolated-tmux send-keys C-u C-l '
+    function fish_prompt
+        if contains -- --final-rendering $argv
+            echo "2> "
+        else
+            echo "transient prompt line"
+            echo "1> "
+        end
+    end
+' C-l
+isolated-tmux send-keys 'echo foo' Enter
+tmux-sleep
+isolated-tmux capture-pane -p
+# CHECK: 2> echo foo
+# CHECK: foo
+# CHECK: transient prompt line
+# CHECK: 1>
+
+# Test that multi-line initial prompt is properly cleared with single-line
+# final.
+isolated-tmux send-keys C-u C-l
+isolated-tmux send-keys 'echo foo \\' Enter
+isolated-tmux send-keys 'bar' Enter
+tmux-sleep
+isolated-tmux capture-pane -p
+# CHECK: 2> echo foo \
+# CHECK:        bar
+# CHECK: foo bar
+# CHECK: transient prompt line
+# CHECK: 1>