1 files changed, 139 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/structured-clone/errors.js b/js/src/jit-test/tests/structured-clone/errors.js
new file mode 100644
index 0000000000..6e72d46b7c
--- /dev/null
+++ b/js/src/jit-test/tests/structured-clone/errors.js
@@ -0,0 +1,139 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+load(libdir + "asserts.js");
+
+function roundtrip(error) {
+  return deserialize(serialize(error, []));
+}
+
+// Basic
+{
+  let error = new Error("hello world");
+  let cloned = roundtrip(error);
+
+  assertDeepEq(cloned, error);
+  assertEq(cloned.name, "Error");
+  assertEq(cloned.message, "hello world");
+  assertEq(cloned.stack, error.stack);
+}
+
+let constructors = [Error, EvalError, RangeError, ReferenceError,
+                    SyntaxError, TypeError, URIError];
+for (let constructor of constructors) {
+  // With message
+  let error = new constructor("hello");
+  let cloned = roundtrip(error);
+  assertDeepEq(cloned, error);
+  assertEq(cloned.hasOwnProperty('message'), true);
+  assertEq(cloned instanceof constructor, true);
+
+  // Without message
+  error = new constructor();
+  cloned = roundtrip(error);
+  assertDeepEq(cloned, error);
+  assertEq(cloned.hasOwnProperty('message'), false);
+  assertEq(cloned instanceof constructor, true);
+
+  // Custom name
+  error = new constructor("hello");
+  error.name = "MyError";
+  cloned = roundtrip(error);
+  assertEq(cloned.name, "Error");
+  assertEq(cloned.message, "hello");
+  assertEq(cloned.stack, error.stack);
+  if (constructor !== Error) {
+    assertEq(cloned instanceof constructor, false);
+  }
+
+  // |cause| property
+  error = new constructor("hello", { cause: new Error("foobar") });
+  cloned = roundtrip(error);
+  assertDeepEq(cloned, error);
+  assertEq(cloned.hasOwnProperty('message'), true);
+  assertEq(cloned instanceof constructor, true);
+  assertEq(cloned.stack, error.stack);
+  assertEq(cloned.stack === undefined, false);
+
+  // |cause| property, manually added after construction.
+  error = new constructor("hello");
+  error.cause = new Error("foobar");
+  assertDeepEq(Object.getOwnPropertyDescriptor(error, "cause"), {
+    value: error.cause,
+    writable: true,
+    enumerable: true,
+    configurable: true,
+  });
+  cloned = roundtrip(error);
+  assertDeepEq(Object.getOwnPropertyDescriptor(cloned, "cause"), {
+    value: cloned.cause,
+    writable: true,
+    enumerable: false,  // Non-enumerable in the cloned object!
+    configurable: true,
+  });
+  assertEq(cloned.hasOwnProperty('message'), true);
+  assertEq(cloned instanceof constructor, true);
+  assertEq(cloned.stack, error.stack);
+  assertEq(cloned.stack === undefined, false);
+
+  // Subclassing
+  error = new (class MyError extends constructor {});
+  cloned = roundtrip(error);
+  assertEq(cloned.name, constructor.name);
+  assertEq(cloned.hasOwnProperty('message'), false);
+  assertEq(cloned.stack, error.stack);
+  assertEq(cloned instanceof Error, true);
+
+  // Cross-compartment
+  error = evalcx(`new ${constructor.name}("hello")`);
+  cloned = roundtrip(error);
+  assertEq(cloned.name, constructor.name);
+  assertEq(cloned.message, "hello");
+  assertEq(cloned.stack, error.stack);
+  assertEq(cloned instanceof constructor, true);
+}
+
+// Non-string message
+{
+  let error = new Error("hello world");
+  error.message = 123;
+  let cloned = roundtrip(error);
+  assertEq(cloned.message, "123");
+  assertEq(cloned.hasOwnProperty('message'), true);
+
+  error = new Error();
+  Object.defineProperty(error, 'message', { get: () => {} });
+  cloned = roundtrip(error);
+  assertEq(cloned.message, "");
+  assertEq(cloned.hasOwnProperty('message'), false);
+}
+
+// AggregateError
+{
+  // With message
+  let error = new AggregateError([{a: 1}, {b: 2}], "hello");
+  let cloned = roundtrip(error);
+  assertDeepEq(cloned, error);
+  assertEq(cloned.hasOwnProperty('message'), true);
+  assertEq(cloned instanceof AggregateError, true);
+
+  // Without message
+  error = new AggregateError([{a: 1}, {b: 2}]);
+  cloned = roundtrip(error);
+  assertDeepEq(cloned, error);
+  assertEq(cloned.hasOwnProperty('message'), false);
+  assertEq(cloned instanceof AggregateError, true);
+
+  // Custom name breaks this!
+  error = new AggregateError([{a: 1}, {b: 2}]);
+  error.name = "MyError";
+  cloned = roundtrip(error);
+  assertEq(cloned.name, "Error");
+  assertEq(cloned.message, "");
+  assertEq(cloned.stack, error.stack);
+  assertEq(cloned instanceof AggregateError, false);
+  assertEq(cloned.errors, undefined);
+  assertEq(cloned.hasOwnProperty('errors'), false);
+}