Add text edit rtl regression test (#7524)

tests/egui_tests/tests/regression_tests.rs

@@ -1,4 +1,5 @@
-use egui::{Color32, Image, Label, RichText, TextWrapMode, include_image};
+use egui::accesskit::Role;
+use egui::{Align, Color32, Image, Label, Layout, RichText, TextWrapMode, include_image};
 use egui_kittest::Harness;
 use egui_kittest::kittest::Queryable as _;
 
@@ -33,3 +34,30 @@ fn hovering_should_preserve_text_format() {
 
     harness.snapshot("hovering_should_preserve_text_format");
 }
+
+#[test]
+fn text_edit_rtl() {
+    let mut text = "hello ".to_owned();
+    let mut harness = Harness::builder().with_size((200.0, 50.0)).build_ui(|ui| {
+        ui.with_layout(Layout::right_to_left(Align::Min), |ui| {
+            _ = ui.button("right");
+            ui.add(
+                egui::TextEdit::singleline(&mut text)
+                    .desired_width(10.0)
+                    .clip_text(false),
+            );
+            _ = ui.button("left");
+        });
+    });
+
+    harness.get_by_role(Role::TextInput).focus();
+    harness.step();
+    harness.snapshot("text_edit_rtl_0");
+
+    harness.get_by_role(Role::TextInput).type_text("world");
+
+    for i in 1..3 {
+        harness.step();
+        harness.snapshot(format!("text_edit_rtl_{i}"));
+    }
+}

tests/egui_tests/tests/snapshots/text_edit_rtl_0.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:336581facb1ec989a43291ed76bd8ddb552c46137a75601f466e6dc4dae77278
+size 2395

tests/egui_tests/tests/snapshots/text_edit_rtl_1.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3b0684c53a20eaa90a9dccef8ac3eaa2a6eede7c770e7bbbba6d995f43584d99
+size 2353

tests/egui_tests/tests/snapshots/text_edit_rtl_2.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:38f325f2e741f18f897502c176f9a7efe276e9adab41a144511121dd8b8a3073
+size 3079