1 files changed, 21 insertions, 0 deletions
diff --git a/testing/web-platform/tests/wasm/jsapi/exception/toString.tentative.any.js b/testing/web-platform/tests/wasm/jsapi/exception/toString.tentative.any.js
new file mode 100644
index 0000000000..52635186c7
--- /dev/null
+++ b/testing/web-platform/tests/wasm/jsapi/exception/toString.tentative.any.js
@@ -0,0 +1,21 @@
+// META: global=window,dedicatedworker,jsshell
+
+test(() => {
+  const argument = { parameters: [] };
+  const tag = new WebAssembly.Tag(argument);
+  const exception = new WebAssembly.Exception(tag, []);
+  assert_class_string(exception, "WebAssembly.Exception");
+}, "Object.prototype.toString on an Exception");
+
+test(() => {
+  assert_own_property(WebAssembly.Exception.prototype, Symbol.toStringTag);
+
+  const propDesc = Object.getOwnPropertyDescriptor(
+    WebAssembly.Exception.prototype,
+    Symbol.toStringTag
+  );
+  assert_equals(propDesc.value, "WebAssembly.Exception", "value");
+  assert_equals(propDesc.configurable, true, "configurable");
+  assert_equals(propDesc.enumerable, false, "enumerable");
+  assert_equals(propDesc.writable, false, "writable");
+}, "@@toStringTag exists on the prototype with the appropriate descriptor");