File 2622-kernel-Fix-shell_update_window-test.patch of Package erlang

From 6505378800a15ad59eb8e6b50c2590b8f7f8fbc5 Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Tue, 19 Dec 2023 14:42:32 +0100
Subject: [PATCH 02/11] kernel: Fix shell_update_window test

The test broke with the addition of the shell expand pager.
The reason it broke is because we now redraw the prompt on
backspace, which means that the cursor will be repositioned
to the correct place.
---
 lib/kernel/test/interactive_shell_SUITE.erl | 38 +++++++++++++++------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/lib/kernel/test/interactive_shell_SUITE.erl b/lib/kernel/test/interactive_shell_SUITE.erl
index 4a7a303656..4720917a15 100644
--- a/lib/kernel/test/interactive_shell_SUITE.erl
+++ b/lib/kernel/test/interactive_shell_SUITE.erl
@@ -953,12 +953,26 @@ shell_update_window(Config) ->
         send_tty(Term,"a"),
         check_location(Term, {0, -Col}),
         send_tty(Term,"BSpace"),
+        check_location(Term, {-1, width(Text)}),
         tmux(["resize-window -t ",tty_name(Term)," -x ",width(Text)+Col]),
-        %% xnfix bug! at least in tmux... seems to work in iTerm as it does not
-        %% need xnfix when resizing
-        check_location(Term, {0, -Col}),
+        %% When resizing, tmux does not xnfix the cursor, so it will remain
+        %% at the previous locations
+        check_location(Term, {-1, width(Text)}),
+        send_tty(Term,"a"),
+        check_location(Term, {0, -Col + 1}),
+
+        %% When we do backspace here, tmux seems to place the cursor in an
+        %% incorrect position except when a terminal is attached.
+        send_tty(Term,"BSpace"),
+        %% This really should be {0, -Col}, but sometimes tmux sets it to
+        %% {-1, width(Text)} instead.
+        check_location(Term, [{0, -Col}, {-1, width(Text)}]),
+
         tmux(["resize-window -t ",tty_name(Term)," -x ",width(Text) div 2 + Col]),
-        check_location(Term, {0, -Col + width(Text) div 2}),
+        %% Depending on what happened with the cursor above, the line will be
+        %% different here.
+        check_location(Term, [{0, -Col + width(Text) div 2},
+                              {-1, -Col + width(Text) div 2}]),
         ok
     after
         stop_tty(Term)
@@ -1823,17 +1837,21 @@ send_stdin(Term, Chars) ->
 
 check_location(Term, Where) ->
     check_location(Term, Where, 5).
+check_location(Term, Where, Attempt) when is_tuple(Where) ->
+    check_location(Term, [Where], Attempt);
 check_location(#tmux{ orig_location = {OrigRow, OrigCol} = Orig } = Term,
-               {AdjRow, AdjCol} = Where, Attempt) ->
+               Where, Attempt) ->
     NewLocation = get_location(Term),
-    case {OrigRow+AdjRow,OrigCol+AdjCol} of
-        NewLocation -> NewLocation;
-        _ when Attempt =:= 0 ->
+    case lists:any(fun({AdjRow, AdjCol}) ->
+                           {OrigRow+AdjRow,OrigCol+AdjCol} =:= NewLocation
+                   end, Where) of
+        true -> NewLocation;
+        false when Attempt =:= 0 ->
             {NewRow, NewCol} = NewLocation,
-            ct:fail({wrong_location, {expected,{AdjRow, AdjCol}},
+            ct:fail({wrong_location, {expected,Where},
                      {got,{NewRow - OrigRow, NewCol - OrigCol},
                       {NewLocation, Orig}}});
-        _ ->
+        false ->
             timer:sleep(50),
             check_location(Term, Where, Attempt -1)
     end.
-- 
2.35.3