Writing unit tests

Unit testing is arguably the most important type of testing and should certainly account for the majority of test cases in the test pyramid. Testing should follow a scientific method where we hold some variables constant, adjust the input, and measure the output. Unit testing accomplishes this by testing individual units in isolation. This allows unit tests to focus on functionality and maximize coverage.

How to do it...

1. Create the project from the following template:

$ sls create --template-url https://github.com/danteinc/js-cloud-native-cookbook/tree/master/ch6/unit-testing --path cncb-unit-testing

2. Navigate to the cncb-unit-testing directory with cd cncb-unit-testing.
3. Install the dependencies with npm...