Add `throw` method test

test/built-ins/AsyncFromSyncIteratorPrototype/throw/absent-value-not-passed.js

@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-%asyncfromsynciteratorprototype%.throw
+description: >
+  `throw` method does not pass absent `value`.
+info: |
+  %AsyncFromSyncIteratorPrototype%.throw ( value )
+
+  [...]
+  8. If value is present, then
+    [...]
+  9. Else,
+    a. Let result be Call(throw, syncIterator).
+  [...]
+flags: [async]
+features: [async-iteration]
+---*/
+
+var throwArgumentsLength;
+var syncIterator = {
+  [Symbol.iterator]() {
+    return this;
+  },
+  next() {
+    return {done: false};
+  },
+  throw() {
+    throwArgumentsLength = arguments.length;
+    return {done: true};
+  },
+};
+
+var asyncIterator = (async function* () {
+  yield* syncIterator;
+})();
+
+asyncIterator.next().then(function() {
+  return asyncIterator.throw();
+}).then(function(result) {
+  throw new Test262Error("Promise should be rejected, got: " + result.value);
+}, function() {
+  assert.sameValue(throwArgumentsLength, 0);
+}).then($DONE, $DONE);