foo.js

var webdriverio = require('webdriverio');
var options = {
    desiredCapabilities: {
        browserName: 'chrome'
    },
    host: '127.0.0.1',
    port: 8888,
    waitforTimeout: 10*1000,
    coloredLogs: true,
    logLevel: 'verbose' // verbose, silent, command, data, result
};
describe('my webdriverio tests', function(done) {

    var client = {};

    beforeEach(function() {
        client = webdriverio.remote( options );
        client.init();
    });

    it('test it', function(done) {
        client
            .url('https://github.com/')
            .getElementSize('.header-logo-wordmark', function(err, result) {
                expect(err).toBeFalsy();
                expect(result.height).toBe(26);
                expect(result.width).toBe(89);
            })
            .getTitle(function(err, title) {
                expect(err).toBeFalsy();
                expect(title).toBe('GitHub · Build software better, together.');
            })
            .getCssProperty('a[href="/plans"]', 'color', function(err, color){
                expect(err).toBeFalsy();
                // console.log( 'color 是: ', color );
                expect(color.value).toBe('rgba(65,131,196,1)');
                // expect(color).toBe('#4183c4');
            })
            .call(done);
    });

    afterEach(function(done) {
        client.end(done);
    });
});