nightwatch-xhr/src/assertions/isXHRSuccess.js

An XHR "Listener" for Nightwatch.js

String.prototype.trunc = String.prototype.trunc ||
    function(n) {
        return (this.length > n) ? this.substr(0, n-3) + '...' : this;
    };

exports.assertion = function XHRSuccess(listenedXhrs = []) {
    const xhrs = Array.isArray(listenedXhrs) ? listenedXhrs : [listenedXhrs];
    this.message = xhrs && xhrs[0] && xhrs[0].url
        ? `Expected ${xhrs[0].url.trunc(30)} be to called successfully`
        : 'Expected unknown url to be called successfully';
    this.expected = 'success';
    this.pass = function(value) { return value === this.expected};
    this.value = function(result) { return result; };
    this.command = function command(callback) {
        const self = this;
        setImmediate(() => callback.call(self, xhrs && xhrs[0] ? xhrs[0].status : ''));
        return this;
    };
};