This document describes breaking changes in major versions and steps to migrate from one to the next.

This version fundamentally changed the Jest integration in module @jazzer.js/jest-runner. The new approach provides a tighter integration with Jest and allows fuzz tests to use all available Jest features. Most notably this includes the widely missed mocking functionality.

• In the Jest configuration, move @jazzer.js/jest-runner from runner to testRunner. A valid configuration looks like this:

{
  displayName: {
  	name: "Jazzer.js",
  	color: "cyan",
  },
  preset: "ts-jest",
-  runner: "@jazzer.js/jest-runner",
+  testRunner: "@jazzer.js/jest-runner",
  testEnvironment: "node",
  testMatch: ["<rootDir>/*.fuzz.[jt]s"],
}