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lib, doc: fix AsyncResource.bind not using 'this' from the caller by default #42177

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merged 5 commits into from Mar 8, 2022
Merged

lib, doc: fix AsyncResource.bind not using 'this' from the caller by default #42177

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f906610
lib: fix AsyncResource.bind not using 'this' from the caller by default
rochdev Mar 1, 2022
280dbb2
doc: update AsyncResource.bind doc to reflect new thisArg behaviour
rochdev Mar 1, 2022
b28e307
lib: refactor AsyncResource.bind to not use globals
rochdev Mar 3, 2022
c172ce2
lib: refactor AsyncResource.bind to reduce number of allocations
rochdev Mar 4, 2022
ab540ff
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aduh95 Mar 7, 2022
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6 changes: 6 additions & 0 deletions doc/api/async_context.md
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Expand Up @@ -446,6 +446,9 @@ added:
- v14.8.0
- v12.19.0
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/42177
description: Changed the default when `thisArg` is not provided to use `this` from the caller.
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- version: v16.0.0
pr-url: https://github.com/nodejs/node/pull/36782
description: Added optional thisArg.
Expand All @@ -468,6 +471,9 @@ added:
- v14.8.0
- v12.19.0
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/42177
description: Changed the default when `thisArg` is not provided to use `this` from the caller.
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- version: v16.0.0
pr-url: https://github.com/nodejs/node/pull/36782
description: Added optional thisArg.
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21 changes: 12 additions & 9 deletions lib/async_hooks.js
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Expand Up @@ -223,15 +223,18 @@ class AsyncResource {
return this[trigger_async_id_symbol];
}

bind(fn, thisArg = this) {
bind(fn, thisArg) {
validateFunction(fn, 'fn');
const ret =
FunctionPrototypeBind(
this.runInAsyncScope,
this,
fn,
thisArg);
ObjectDefineProperties(ret, {
const runInAsyncScope = FunctionPrototypeBind(
this.runInAsyncScope,
this,
fn);
function bound(...args) {
return runInAsyncScope(
thisArg !== undefined ? thisArg : this,
...args);
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}
ObjectDefineProperties(bound, {
'length': {
configurable: true,
enumerable: false,
Expand All @@ -245,7 +248,7 @@ class AsyncResource {
writable: true,
}
});
return ret;
return bound;
}

static bind(fn, type, thisArg) {
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7 changes: 6 additions & 1 deletion test/parallel/test-asyncresource-bind.js
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Expand Up @@ -41,11 +41,16 @@ const fn3 = asyncResource.bind(common.mustCall(function() {
fn3();

const fn4 = asyncResource.bind(common.mustCall(function() {
assert.strictEqual(this, asyncResource);
assert.strictEqual(this, undefined);
}));
fn4();

const fn5 = asyncResource.bind(common.mustCall(function() {
assert.strictEqual(this, false);
}), false);
fn5();

const fn6 = asyncResource.bind(common.mustCall(function() {
assert.strictEqual(this, 'test');
}));
fn6.call('test');