Test macos pixel density test fix

Author: loftafi

src/engine.zig

@@ -3609,6 +3609,7 @@ test "button sizing" {
 
     const not_quite_one_line = default_font_size * 2 - 5;
     const not_quite_two_lines = default_font_size * 2 - 5;
+
     var button = try panel.add(allocator, display, .{
         .visible = .visible,
         .rect = .{ .width = 50, .height = 50 },
@@ -3655,8 +3656,16 @@ test "button sizing" {
     display.relayout();
     try eq(42, @round(button.rect.width / display.pixel_density));
     try eq(100, @round(panel.rect.width));
-    try eq(default_font_size, button.rect.height / display.pixel_density);
+    try eq(not_quite_two_lines, button.rect.height / display.pixel_density);
     try eq(0, panel.rect.height);
+
+    try button.set_text(allocator, display, "Hello Defragment");
+    display.relayout();
+    try eq(default_font_size * 2, button.rect.height / display.pixel_density);
+    panel.pad.top = 4;
+    panel.pad.bottom = 5;
+    display.relayout();
+    try eq(default_font_size * 2 + 4 + 5, button.rect.height / display.pixel_density);
 }
 
 test "text input sizing" {