From 6dcec75e3243810c0269e8273b8d9a45dbdf1bb7 Mon Sep 17 00:00:00 2001
From: Tim Culverhouse <tim@timculverhouse.com>
Date: Sun, 21 Jan 2024 07:02:06 -0600
Subject: [PATCH] reflow: add unit tests for wraparound mode

Add unit tests for resizing with wraparound on and off.
---
 src/terminal/Terminal.zig | 41 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/src/terminal/Terminal.zig b/src/terminal/Terminal.zig
index 97b5d9c63..c93a061b4 100644
--- a/src/terminal/Terminal.zig
+++ b/src/terminal/Terminal.zig
@@ -5099,6 +5099,47 @@ test "Terminal: resize with left and right margin set" {
     try t.resize(alloc, cols, rows);
 }
 
+// https://github.com/mitchellh/ghostty/issues/1343
+test "Terminal: resize with wraparound off" {
+    const alloc = testing.allocator;
+    const cols = 4;
+    const rows = 2;
+    var t = try init(alloc, cols, rows);
+    defer t.deinit(alloc);
+
+    t.modes.set(.wraparound, false);
+    try t.print('0');
+    try t.print('1');
+    try t.print('2');
+    try t.print('3');
+    const new_cols = 2;
+    try t.resize(alloc, new_cols, rows);
+
+    const str = try t.plainString(testing.allocator);
+    defer testing.allocator.free(str);
+    try testing.expectEqualStrings("01", str);
+}
+
+test "Terminal: resize with wraparound on" {
+    const alloc = testing.allocator;
+    const cols = 4;
+    const rows = 2;
+    var t = try init(alloc, cols, rows);
+    defer t.deinit(alloc);
+
+    t.modes.set(.wraparound, true);
+    try t.print('0');
+    try t.print('1');
+    try t.print('2');
+    try t.print('3');
+    const new_cols = 2;
+    try t.resize(alloc, new_cols, rows);
+
+    const str = try t.plainString(testing.allocator);
+    defer testing.allocator.free(str);
+    try testing.expectEqualStrings("01\n23", str);
+}
+
 test "Terminal: saveCursor" {
     const alloc = testing.allocator;
     var t = try init(alloc, 3, 3);