test262/test/language/statements/async-generator/yield-star-sync-throw.js

// This file was procedurally generated from the following sources:
// - src/async-generators/yield-star-sync-throw.case
// - src/async-generators/default/async-declaration.template
/*---
description: execution order for yield* with sync iterator and throw() (Async generator Function declaration)
esid: prod-AsyncGeneratorDeclaration
features: [async-iteration]
flags: [generated, async]
info: |
    Async Generator Function Definitions

    AsyncGeneratorDeclaration:
      async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
        AsyncGeneratorBody }


    YieldExpression: yield * AssignmentExpression

    ...
    6. 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]] »).
          2. If generatorKind is async, then set innerResult to
             ? Await(innerResult).
          ...
          5. Let done be ? IteratorComplete(innerResult).
          6. If done is true, then
            a. Return ? IteratorValue(innerResult).
          7. Let received be GeneratorYield(innerResult).
      ...

    %AsyncFromSyncIteratorPrototype%.throw ( value )

    ...
    5. Let throw be GetMethod(syncIterator, "throw").
    ...
    8. Let throwResult be Call(throw, syncIterator, « value »).
    ...
    11. Let throwValue be IteratorValue(throwResult).
    ...
    13. Let throwDone be IteratorComplete(throwResult).
    ...
    16. Perform ! Call(valueWrapperCapability.[[Resolve]], undefined,
        « throwValue »).
    ...
    18. Set onFulfilled.[[Done]] to throwDone.
    19. Perform ! PerformPromiseThen(valueWrapperCapability.[[Promise]],
        onFulfilled, undefined, promiseCapability).
    ...

---*/
var log = [];
var obj = {
  [Symbol.iterator]() {
    var throwCount = 0;
    return {
      name: "syncIterator",
      get next() {
        log.push({ name: "get next" });
        return function() {
          return {
            value: "next-value-1",
            done: false
          };
        };
      },
      get throw() {
        log.push({
          name: "get throw",
          thisValue: this
        });
        return function() {
          log.push({
            name: "call throw",
            thisValue: this,
            args: [...arguments]
          });

          throwCount++;
          if (throwCount == 1) {
            return {
              name: "throw-result-1",
              get value() {
                log.push({
                  name: "get throw value (1)",
                  thisValue: this
                });
                return "throw-value-1";
              },
              get done() {
                log.push({
                  name: "get throw done (1)",
                  thisValue: this
                });
                return false;
              }
            };
          }

          return {
            name: "throw-result-2",
            get value() {
              log.push({
                name: "get throw value (2)",
                thisValue: this
              });
              return "throw-value-2";
            },
            get done() {
              log.push({
                name: "get throw done (2)",
                thisValue: this
              });
              return true;
            }
          };
        };
      }
    };
  }
};



var callCount = 0;

async function *gen() {
  callCount += 1;
  log.push({ name: "before yield*" });
    var v = yield* obj;
    log.push({
      name: "after yield*",
      value: v
    });
    return "return-value";

}

var iter = gen();

assert.sameValue(log.length, 0, "log.length");

iter.next().then(v => {
  assert.sameValue(log[0].name, "before yield*");

  assert.sameValue(log[1].name, "get next");

  assert.sameValue(v.value, "next-value-1");
  assert.sameValue(v.done, false);

  assert.sameValue(log.length, 2, "log.length");

  iter.throw("throw-arg-1").then(v => {
    assert.sameValue(log[2].name, "get throw");
    assert.sameValue(log[2].thisValue.name, "syncIterator", "get throw thisValue");

    assert.sameValue(log[3].name, "call throw");
    assert.sameValue(log[3].thisValue.name, "syncIterator", "throw thisValue");
    assert.sameValue(log[3].args.length, 1, "throw args.length");
    assert.sameValue(log[3].args[0], "throw-arg-1", "throw args[0]");

    assert.sameValue(log[4].name, "get throw done (1)");
    assert.sameValue(log[4].thisValue.name, "throw-result-1", "get throw done thisValue");

    assert.sameValue(log[5].name, "get throw value (1)");
    assert.sameValue(log[5].thisValue.name, "throw-result-1", "get throw value thisValue");

    assert.sameValue(v.value, "throw-value-1");
    assert.sameValue(v.done, false);

    assert.sameValue(log.length, 6, "log.length");

    iter.throw("throw-arg-2").then(v => {
      assert.sameValue(log[6].name, "get throw");
      assert.sameValue(log[6].thisValue.name, "syncIterator", "get throw thisValue");

      assert.sameValue(log[7].name, "call throw");
      assert.sameValue(log[7].thisValue.name, "syncIterator", "throw thisValue");
      assert.sameValue(log[7].args.length, 1, "throw args.length");
      assert.sameValue(log[7].args[0], "throw-arg-2", "throw args[0]");

      assert.sameValue(log[8].name, "get throw done (2)");
      assert.sameValue(log[8].thisValue.name, "throw-result-2", "get throw done thisValue");

      assert.sameValue(log[9].name, "get throw value (2)");
      assert.sameValue(log[9].thisValue.name, "throw-result-2", "get throw value thisValue");

      assert.sameValue(log[10].name, "after yield*");
      assert.sameValue(log[10].value, "throw-value-2");

      assert.sameValue(v.value, "return-value");
      assert.sameValue(v.done, true);

      assert.sameValue(log.length, 11, "log.length");
    }).then($DONE, $DONE);
  }).catch($DONE);
}).catch($DONE);

assert.sameValue(callCount, 1);