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/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
Components.utils.import("resource://gre/modules/PromiseUtils.jsm");
Components.utils.import("resource://gre/modules/Timer.jsm");
Components.utils.import("resource://testing-common/PromiseTestUtils.jsm");
// Tests for PromiseUtils.jsm
function run_test() {
run_next_test();
}
// Tests for PromiseUtils.defer()
/* Tests for checking the resolve method of the Deferred object
* returned by PromiseUtils.defer() */
add_task(function* test_resolve_string() {
let def = PromiseUtils.defer();
let expected = "The promise is resolved " + Math.random();
def.resolve(expected);
let result = yield def.promise;
Assert.equal(result, expected, "def.resolve() resolves the promise");
});
/* Test for the case when undefined is passed to the resolve method
* of the Deferred object */
add_task(function* test_resolve_undefined() {
let def = PromiseUtils.defer();
def.resolve();
let result = yield def.promise;
Assert.equal(result, undefined, "resolve works with undefined as well");
});
/* Test when a pending promise is passed to the resolve method
* of the Deferred object */
add_task(function* test_resolve_pending_promise() {
let def = PromiseUtils.defer();
let expected = 100 + Math.random();
let p = new Promise((resolve, reject) => {
setTimeout(() => resolve(expected), 100);
});
def.resolve(p);
let result = yield def.promise;
Assert.equal(result, expected, "def.promise assumed the state of the passed promise");
});
/* Test when a resovled promise is passed
* to the resolve method of the Deferred object */
add_task(function* test_resolve_resolved_promise() {
let def = PromiseUtils.defer();
let expected = "Yeah resolved" + Math.random();
let p = new Promise((resolve, reject) => resolve(expected));
def.resolve(p);
let result = yield def.promise;
Assert.equal(result, expected, "Resolved promise is passed to the resolve method");
});
/* Test for the case when a rejected promise is
* passed to the resolve method */
add_task(function* test_resolve_rejected_promise() {
let def = PromiseUtils.defer();
let p = new Promise((resolve, reject) => reject(new Error("There its an rejection")));
def.resolve(p);
yield Assert.rejects(def.promise, /There its an rejection/, "Settled rejection promise passed to the resolve method");
});
/* Test for the checking the reject method of
* the Deferred object returned by PromiseUtils.defer() */
add_task(function* test_reject_Error() {
let def = PromiseUtils.defer();
def.reject(new Error("This one rejects"));
yield Assert.rejects(def.promise, /This one rejects/, "reject method with Error for rejection");
});
/* Test for the case when a pending Promise is passed to
* the reject method of Deferred object */
add_task(function* test_reject_pending_promise() {
let def = PromiseUtils.defer();
let p = new Promise((resolve, reject) => {
setTimeout(() => resolve(100), 100);
});
def.reject(p);
yield Assert.rejects(def.promise, Promise, "Rejection with a pending promise uses the passed promise itself as the reason of rejection");
});
/* Test for the case when a resolved Promise
* is passed to the reject method */
add_task(function* test_reject_resolved_promise() {
let def = PromiseUtils.defer();
let p = new Promise((resolve, reject) => resolve("This resolved"));
def.reject(p);
yield Assert.rejects(def.promise, Promise, "Rejection with a resolved promise uses the passed promise itself as the reason of rejection");
});
/* Test for the case when a rejected Promise is
* passed to the reject method */
add_task(function* test_reject_resolved_promise() {
PromiseTestUtils.expectUncaughtRejection(/This one rejects/);
let def = PromiseUtils.defer();
let p = new Promise((resolve, reject) => reject(new Error("This one rejects")));
def.reject(p);
yield Assert.rejects(def.promise, Promise, "Rejection with a rejected promise uses the passed promise itself as the reason of rejection");
});
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