Add some more text edit tests (#7608)

Adds tests to text the clip option in text edits and how it behaves with
a placeholder

---------

Co-authored-by: lucasmerlin <8009393+lucasmerlin@users.noreply.github.com>

tests/egui_tests/tests/snapshots/layout/text_edit_clip.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0f107d95fee9a5fb5fbfd2422452e1820738a84c81774587dbfa8153e91e4c73
+size 414552

tests/egui_tests/tests/snapshots/layout/text_edit_no_clip.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6c1aebada9349f8cb4046469b0a6f9796a21f88b6724bd85cd832a40b8007409
+size 540527

tests/egui_tests/tests/snapshots/layout/text_edit_placeholder_clip.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:685de2e33ff26aafa87426bcda18bb9963c2deb2a811cd0aae4450af0e245a06
+size 390735

tests/egui_tests/tests/snapshots/visuals/text_edit_clip.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cf4236b1a8f63d184cd780c334d9f996e4d47817a96a29f0d81658d2d897597f
+size 10529

tests/egui_tests/tests/snapshots/visuals/text_edit_no_clip.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c7a63953853f526b83f80d63335b03e60258ea9a3416d19f8ed57d746b5c551d
+size 21557

tests/egui_tests/tests/snapshots/visuals/text_edit_placeholder_clip.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1f7d802a4de7e30f8d254cab6d9ca127866c104c1738103bc4a579917e8f42d3
+size 9850

tests/egui_tests/tests/test_widgets.rs

@@ -2,7 +2,7 @@ use egui::accesskit::Role;
 use egui::load::SizedTexture;
 use egui::{
     Align, AtomExt as _, AtomLayout, Button, Color32, ColorImage, Direction, DragValue, Event,
-    Grid, IntoAtoms as _, Layout, PointerButton, Response, Slider, Stroke, StrokeKind,
+    Grid, IntoAtoms as _, Layout, PointerButton, Response, Slider, Stroke, StrokeKind, TextEdit,
     TextWrapMode, TextureHandle, TextureOptions, Ui, UiBuilder, Vec2, Widget as _, include_image,
 };
 use egui_kittest::kittest::{Queryable as _, by};
@@ -84,6 +84,37 @@ fn widget_tests() {
         },
         &mut results,
     );
+    test_widget(
+        "text_edit_clip",
+        |ui| {
+            ui.spacing_mut().text_edit_width = 45.0;
+            TextEdit::singleline(&mut "This is a very very long text".to_owned())
+                .clip_text(true)
+                .ui(ui)
+        },
+        &mut results,
+    );
+    test_widget(
+        "text_edit_no_clip",
+        |ui| {
+            ui.spacing_mut().text_edit_width = 45.0;
+            TextEdit::singleline(&mut "This is a very very long text".to_owned())
+                .clip_text(false)
+                .ui(ui)
+        },
+        &mut results,
+    );
+    test_widget(
+        "text_edit_placeholder_clip",
+        |ui| {
+            ui.spacing_mut().text_edit_width = 45.0;
+            TextEdit::singleline(&mut String::new())
+                .hint_text("This is a very very long placeholder")
+                .clip_text(true)
+                .ui(ui)
+        },
+        &mut results,
+    );
 
     test_widget(
         "slider",