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Bug 1131829 - remove PromiseUtils.resolveOrTimeout. r=yoric

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This commit is contained in:
Mark Hammond 2015-02-13 08:43:31 +11:00
parent 52da79328b
commit f70be7a06e
2 changed files with 0 additions and 114 deletions
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44
toolkit/modules/PromiseUtils.jsm
View File

@ -9,50 +9,6 @@ this.EXPORTED_SYMBOLS = ["PromiseUtils"];
Components.utils.import("resource://gre/modules/Timer.jsm");
this.PromiseUtils = {
/*
* A simple timeout mechanism.
*
* Example:
* resolveOrTimeout(myModule.shutdown(), 1000,
* () => new Error("The module took too long to shutdown"));
*
* @param {Promise} promise The Promise that should resolve/reject quickly.
* @param {number} delay A delay after which to stop waiting for `promise`, in milliseconds.
* @param {function} rejection If `promise` hasn't resolved/rejected after `delay`,
* a value used to construct the rejection.
*
* @return {Promise} A promise that behaves as `promise`, if `promise` is
* resolved/rejected within `delay` ms, or rejects with `rejection()` otherwise.
*/
resolveOrTimeout : function(promise, delay, rejection) {
// throw a TypeError if <promise> is not a Promise object
if (!(promise instanceof Promise)) {
throw new TypeError("first argument <promise> must be a Promise object");
}
// throw a TypeError if <delay> is not a number
if (typeof delay != "number" || delay < 0) {
throw new TypeError("second argument <delay> must be a positive number");
}
// throws a TypeError if <rejection> is not a function
if (rejection && typeof rejection != "function") {
throw new TypeError("third optional argument <rejection> must be a function");
}
return new Promise((resolve, reject) => {
promise.then(resolve, reject);
let id = setTimeout(() => {
try {
rejection ? reject(rejection()) : reject(new Error("Promise Timeout"));
} catch(ex) {
reject(ex);
}
clearTimeout(id);
}, delay);
});
},
/*
* Creates a new pending Promise and provide methods to resolve and reject this Promise.
*

70
toolkit/modules/tests/xpcshell/test_PromiseUtils.js
View File

@ -11,76 +11,6 @@ function run_test() {
run_next_test();
}
///////////////////////////////////////////////////////////////////////////////////////////
// Tests for PromiseUtils.resolveOrTimeout()
///////////////////////////////////////////////////////////////////////////////////////////
/* Tests for the case when arguments to resolveOrTimeout
* are not of correct type */
add_task(function* test_wrong_arguments() {
let p = new Promise((resolve, reject) => {});
// for the first argument
Assert.throws(() => PromiseUtils.resolveOrTimeout("string", 200), /first argument <promise> must be a Promise object/,
"TypeError thrown because first argument is not a Promsie object");
// for second argument
Assert.throws(() => PromiseUtils.resolveOrTimeout(p, "string"), /second argument <delay> must be a positive number/,
"TypeError thrown because second argument is not a positive number");
// for the third argument
Assert.throws(() => PromiseUtils.resolveOrTimeout(p, 200, "string"), /third optional argument <rejection> must be a function/,
"TypeError thrown because thrird argument is not a function");
});
/* Tests for the case when the optional third argument is not provided
* In that case the returned promise rejects with a default Error */
add_task(function* test_optional_third_argument() {
let p = new Promise((resolve, reject) => {});
yield Assert.rejects(PromiseUtils.resolveOrTimeout(p, 200), /Promise Timeout/, "Promise rejects with a default Error");
});
/* Test for the case when the passed promise resolves quickly
* In that case the returned promise also resolves with the same value */
add_task(function* test_resolve_quickly() {
let p = new Promise((resolve, reject) => setTimeout(() => resolve("Promise is resolved"), 20));
let result = yield PromiseUtils.resolveOrTimeout(p, 200);
Assert.equal(result, "Promise is resolved", "Promise resolves quickly");
});
/* Test for the case when the passed promise rejects quickly
* In that case the returned promise also rejects with the same value */
add_task(function* test_reject_quickly() {
let p = new Promise((resolve, reject) => setTimeout(() => reject("Promise is rejected"), 20));
yield Assert.rejects(PromiseUtils.resolveOrTimeout(p, 200), /Promise is rejected/, "Promise rejects quickly");
});
/* Tests for the case when the passed promise doesn't settle
* and rejection returns string/object/undefined */
add_task(function* test_rejection_function() {
let p = new Promise((resolve, reject) => {});
// for rejection returning string
yield Assert.rejects(PromiseUtils.resolveOrTimeout(p, 200, () => {
return "Rejection returned a string";
}), /Rejection returned a string/, "Rejection returned a string");
// for rejection returning object
yield Assert.rejects(PromiseUtils.resolveOrTimeout(p, 200, () => {
return {Name:"Promise"};
}), Object, "Rejection returned an object");
// for rejection returning undefined
yield Assert.rejects(PromiseUtils.resolveOrTimeout(p, 200, () => {
return;
}), undefined, "Rejection returned undefined");
});
/* Tests for the case when the passed promise doesn't settles
* and rejection throws an error */
add_task(function* test_rejection_throw_error() {
let p = new Promise((resolve, reject) => {});
yield Assert.rejects(PromiseUtils.resolveOrTimeout(p, 200, () => {
throw new Error("Rejection threw an Error");
}), /Rejection threw an Error/, "Rejection threw an error");
});
///////////////////////////////////////////////////////////////////////////////////////
// Tests for PromiseUtils.defer()
///////////////////////////////////////////////////////////////////////////////////////