Key Concepts

Inferno Core

Inferno Core is the primary library of Inferno, which testers can use to build Inferno Test Kits. It provides the main logic of Inferno, as well as a CLI, a web interface for executing tests, and integration with data persistence layers and third-party party validators. Conceptually, Inferno Core is similar to Ruby on Rails or React + create-react-app.

Inferno DSL

A Domain Specific Language (DSL) that test writers use to define the tests in an Inferno Test Kit. The DSL provides built-in functionality that is useful in testing FHIR APIs, such as a FHIR client and built-in assertion libraries. See Writing Tests for more information.

Inferno Test Kit

A distributable set of tests and tools built and packaged using Inferno to help testers evaluate the conformance of a system to base FHIR specification requirements, relevant FHIR Implementation Guides, and any additional requirements. Test Kits are primarily composed of one or more Test Suites, but may include other tools such as FHIR resource validators or reference implementations.

Inferno Template

A template for writing Inferno Test Kits. See Template Layout for more information.

Inferno Test Suite

An executable set of tests provided within an Inferno Test Kit that allows testers to evaluate the conformance of a system. They can import tests from other Test Kits. Each Test Suite also defines how to interpret failures at the test level and in aggregate. For example, a Test Suite may define that a conformant system will pass all provided tests, or that the system may fail some tests.

Validators

Validators are tools that validate the correctness of a piece of data against a set of rules defined within a context. Inferno tests typically fetch data and validate the response using a validator, for example the FHIR Profile Validator or the FHIR Terminology Validator. Inferno typically performs these functions by providing common third-party validators (e.g. HL7 FHIR Validator).

Reference Implementations

An Inferno Test Kit may provide one or more reference implementations, which is a program that implements all requirements from a specification (e.g. FHIR) and demonstrates “correct” behavior. They can be useful to develop tests against or to help interact with third-party solutions. For example, Inferno has a Reference Server for US Core and the Inferno ONC (g)(10) certification tests.

Inferno Deployment

A web host running one or more Inferno Test Kits. An example is the https://inferno.healthit.gov website. An individual Test Kit can also be run as an Inferno Deployment on users’ local machines without any additional configuration. An Inferno Deployment includes a web interface as well as a RESTful API to enable third-party integration.