instanceof svgelement test

src/browser/html/svg_elements.zig

@@ -29,3 +29,13 @@ pub const SVGElement = struct {
     // a Self type to cast to.
     pub const subtype = .node;
 };
+
+const testing = @import("../../testing.zig");
+test "Browser.HTML.SVGElement" {
+    var runner = try testing.jsRunner(testing.tracking_allocator, .{});
+    defer runner.deinit();
+
+    try runner.testCases(&.{
+        .{ "'AString' instanceof SVGElement", "false" },
+    }, .{});
+}