yield-spread-arr-single.js

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// |reftest| async

// This file was procedurally generated from the following sources:

// - src/async-generators/yield-spread-arr-single.case

// - src/async-generators/default/async-class-expr-method.template

/*---

description: Use yield value in a array spread position (Async generator method as a ClassExpression element)

esid: prod-AsyncGeneratorMethod

features: [async-iteration]

flags: [generated, async]

info: |

    ClassElement :

      MethodDefinition

    MethodDefinition :

      AsyncGeneratorMethod

    Async Generator Function Definitions

    AsyncGeneratorMethod :

      async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { AsyncGeneratorBody }

    Array Initializer

    SpreadElement[Yield, Await]:

      ...AssignmentExpression[+In, ?Yield, ?Await]

---*/

var arr = ['a', 'b', 'c'];

var callCount = 0;

var C = class { async *gen() {

    callCount += 1;

    yield [...yield];

}}

var gen = C.prototype.gen;

var iter = gen();

iter.next(false);

var item = iter.next(arr);

item.then(({ done, value }) => {

  assert.notSameValue(value, arr, 'value is a new array');

  assert(Array.isArray(value), 'value is an Array exotic object');

  assert.sameValue(value.length, 3)

  assert.sameValue(value[0], 'a');

  assert.sameValue(value[1], 'b');

  assert.sameValue(value[2], 'c');

  assert.sameValue(done, false);

}).then($DONE, $DONE);

assert.sameValue(callCount, 1);