diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/tests/test262/language/statements/async-generator/yield-return-then-getter-ticks.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/tests/test262/language/statements/async-generator/yield-return-then-getter-ticks.js')
-rw-r--r-- | js/src/tests/test262/language/statements/async-generator/yield-return-then-getter-ticks.js | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/async-generator/yield-return-then-getter-ticks.js b/js/src/tests/test262/language/statements/async-generator/yield-return-then-getter-ticks.js new file mode 100644 index 0000000000..2a3b580a91 --- /dev/null +++ b/js/src/tests/test262/language/statements/async-generator/yield-return-then-getter-ticks.js @@ -0,0 +1,105 @@ +// |reftest| async +// Copyright (C) 2019 André Bargull. 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: > + Return resumption value is awaited upon and hence is treated as a thenable. +info: | + 14.4.14 Runtime Semantics: Evaluation + YieldExpression : yield AssignmentExpression + + ... + 3. Let value be ? GetValue(exprRef). + 4. If generatorKind is async, then return ? AsyncGeneratorYield(value). + ... + + 25.5.3.7 AsyncGeneratorYield ( value ) + ... + 5. Set value to ? Await(value). + ... + 8. Set the code evaluation state of genContext such that when evaluation is resumed with a + Completion resumptionValue the following steps will be performed: + ... + b. Let awaited be Await(resumptionValue.[[Value]]). + ... + e. Return Completion { [[Type]]: return, [[Value]]: awaited.[[Value]], [[Target]]: empty }. + ... + + 6.2.3.1 Await + ... + 2. Let promise be ? PromiseResolve(%Promise%, « value »). + ... + + 25.6.4.5.1 PromiseResolve ( C, x ) + ... + 3. Let promiseCapability be ? NewPromiseCapability(C). + 4. Perform ? Call(promiseCapability.[[Resolve]], undefined, « x »). + ... + + 25.6.1.5 NewPromiseCapability ( C ) + ... + 7. Let promise be ? Construct(C, « executor »). + ... + + 25.6.3.1 Promise ( executor ) + ... + 8. Let resolvingFunctions be CreateResolvingFunctions(promise). + ... + + 25.6.1.3 CreateResolvingFunctions ( promise ) + ... + 2. Let stepsResolve be the algorithm steps defined in Promise Resolve Functions (25.6.1.3.2). + 3. Let resolve be CreateBuiltinFunction(stepsResolve, « [[Promise]], [[AlreadyResolved]] »). + ... + + 25.6.1.3.2 Promise Resolve Functions + ... + 9. Let then be Get(resolution, "then"). + ... + +includes: [compareArray.js] +flags: [async] +features: [async-iteration] +---*/ + +var expected = [ + "start", + + // `Await(value)` promise resolved. + "tick 1", + + // "then" of `resumptionValue.[[Value]]` accessed. + "get then", + + // `Await(resumptionValue.[[Value]])` promise resolved. + "tick 2", +]; + +var actual = []; + +async function* f() { + actual.push("start"); + yield 123; + actual.push("stop - never reached"); +} + +Promise.resolve(0) + .then(() => actual.push("tick 1")) + .then(() => actual.push("tick 2")) + .then(() => { + assert.compareArray(actual, expected, "Ticks for return with thenable getter"); +}).then($DONE, $DONE); + +var it = f(); + +// Start generator execution. +it.next(); + +// Stop generator execution. +it.return({ + get then() { + actual.push("get then"); + } +}); |