Grammarinator is an ANTLR v4 grammar-based test generator. In this tutorial we are going to use it to generate tests based on the Swagger Petstore API. How to write an ANTRL grammar from a REST API To run the Swagger Petstore API locally, we are going to use docker: docker run --name swaggerapi-petstore3 -d -p 8080:8080 swaggerapi/petstore3:unstable By executing the…