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31 lines
811 B
JavaScript
31 lines
811 B
JavaScript
/* Any copyright is dedicated to the Public Domain.
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* http://creativecommons.org/publicdomain/zero/1.0/ */
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Cu.import("resource://services-common/async.js");
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function run_test() {
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_("Chain a few async methods, making sure the 'this' object is correct.");
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let methods = {
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save: function(x, callback) {
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this.x = x;
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callback(x);
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},
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addX: function(x, callback) {
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callback(x + this.x);
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},
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double: function(x, callback) {
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callback(x * 2);
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},
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neg: function(x, callback) {
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callback(-x);
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}
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};
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methods.chain = Async.chain;
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// ((1 + 1 + 1) * (-1) + 1) * 2 + 1 = -3
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methods.chain(methods.save, methods.addX, methods.addX, methods.neg,
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methods.addX, methods.double, methods.addX, methods.save)(1);
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do_check_eq(methods.x, -3);
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}
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