Android and JUnit: Create a JUnit Project or a test source folder

Question

There is an option to create an Android JUnit Project.

As far as I am aware the other way is to create a folder in the same project called test which contains the same package name as the existing project.

What are the differences between these two methods.

Answer 1

When I develop in Java, I usually create a separate /test folder in the same project as my source, with the identical package structure underneath it.

I keep the two separate so that the /test contents don't get packaged up and deployed with the source code. No sense deploying tests or the 3rd party JARs on which they depend.

Answer 2

Create a separate project. There's a number of reasons to do that, among others your tests won't be included in you final APK, you may need a different AndroidManifext.xml for your main project and for your tests and because it's a common practice and your project will be more understandable by others.