Add yield* throw() method test

test/annexB/language/expressions/yield/star-iterable-throw-emulates-undefined-throws-when-called.js

@@ -0,0 +1,40 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-generator-function-definitions-runtime-semantics-evaluation
+description: >
+  If <iterator>.throw is an object emulating `undefined` (e.g. `document.all`
+  in browsers), it shouldn't be treated as if it were actually `undefined` by
+  the yield* operator.
+info: |
+  YieldExpression : yield * AssignmentExpression
+
+  [...]
+  7. Repeat,
+    [...]
+    b. Else if received.[[Type]] is throw, then
+      i. Let throw be ? GetMethod(iterator, "throw").
+      ii. If throw is not undefined, then
+        1. Let innerResult be ? Call(throw, iterator, « received.[[Value]] »).
+        [...]
+        4. If Type(innerResult) is not Object, throw a TypeError exception.
+features: [generators, IsHTMLDDA]
+---*/
+
+var IsHTMLDDA = $262.IsHTMLDDA;
+var returnCalls = 0;
+var inner = {
+  [Symbol.iterator]() { return this; },
+  next() { return {done: false}; },
+  throw: IsHTMLDDA,
+  return() {
+    returnCalls += 1;
+    return {done: true};
+  },
+};
+
+var outer = (function* () { yield* inner; })();
+outer.next();
+outer.throw();
+
+assert.sameValue(returnCalls, 0);