UI-less on-device test: Setup

- [Instructor] Great, now we're on our way to read from an asset folder into a recipe store. How do we test it? We cannot use JVN unit test because the recipe store class requires a context to read the assets. We need to use an instrumentation test. Remember, an instrumentation test runs on a device, and, therefore, have access to Android classes. To create an instrumentation test we will add espresso as a dependency.

Go to app slash build.gradle. In the dependency block in line 24 we will add another dependency. This time we will use an Android test dependency, so Android test compile. And then we are going to use com.android.support.test.espresso: espresso-core: 2.2.2.

We are going to actually exclude something from this dependency. Exclude group: com.android.support, module: support-annotations. We add this exclude line for espresso library so that we can avoid version conflict with the support annotations that is included by addcompat in line 23.

Click on sync now to run a gradle sync. With all the dependencies taken care of, let's write the test.