In the previous chapter, we wrote an Instagram-like application to apply effects to our pictures with the help of the Pixastic library. Also, we built custom PhoneGap/Cordova plugins for iOS. In this chapter, we will talk about testing, why it is so important, and how to integrate it in our workflow. Also, we will review different types of testing, frameworks and tools to do automated tests. However, before moving forward with the testing description, let's look at the debugging possibilities with PhoneGap.