How to configure a Maven project to use JUnit 5. How to write tests using the @Test and @ParameterizedTest annotations. How to validate test results using JUnit 5’s built-in assertion functionality.

This is a complete tutorial, discussing how to build a simple calculator app for Android. Check it out, and implement some of the recommended improvements.

Using a step-by-step example in Java, this article provides a practical example of how to use test-driven development (TDD) to divide, test, and conquer larger problems when coding.

If you know what you’re doing, the whole process — create, code, deploy and test — can be done in less than two minutes. It’s a testament to how simple it is to create an AWS Lambda function in Java.