Testing Constructs (Optional) #

The CDK Developer Guide has a good guide on testing constructs. For this section of the workshop we are going to use the Fine-Grained Assertions.

CDK assert Library #

We will be using the CDK Assertions (Amazon.CDK.Assertions) library throughout this section. The library contains several helper functions for writing unit and integration tests.

For this workshop we will mostly be using the HasResourceProperties function. This helper is used when you only care that a resource of a particular type exists (regardless of its logical identifier), and that some properties are set to specific values.

Example:

template.HasResourceProperties("AWS::Lambda::Function", new Dictionary<string, object> {
    { "Handler", "hitcounter.handler" },
    { "Environment", Match.AnyValue() }
});

Match.AnyValue() can be used to assert that a particular key in an object is set with any value.

To see the rest of the documentation, please read the docs here.