await-expr-resolution.js

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// |reftest| module async

// Copyright (C) 2019 Leo Balter. All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

description: >

  AwaitExpression Resolutions

info: |

  ModuleItem:

    StatementListItem[~Yield, +Await, ~Return]

...

  UnaryExpression[Yield, Await]

    void UnaryExpression[?Yield, ?Await]

    [+Await]AwaitExpression[?Yield]

  AwaitExpression[Yield]:

    await UnaryExpression[?Yield, +Await]

esid: prod-AwaitExpression

flags: [module, async]

features: [top-level-await]

---*/

var x;

x = await 42;

assert.sameValue(x, 42, 'number');

x = await '';

assert.sameValue(x, '', 'string');

var s = Symbol();

x = await s;

assert.sameValue(x, s, 'symbol');

x = await false;

assert.sameValue(x, false, 'false');

x = await true;

assert.sameValue(x, true, 'true');

x = await NaN;

assert.sameValue(x, NaN, 'NaN');

x = await null;

assert.sameValue(x, null, 'null');

x = await undefined;

assert.sameValue(x, undefined, 'undefined');

var obj = {};

x = await obj;

assert.sameValue(x, obj, 'object');

x = await Promise.resolve(1).then(v => v * 2).then(v => v * 3);

assert.sameValue(x, 6, 'promise');

$DONE();