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