medusa-starter/jest.config.js

const { loadEnv } = require('@medusajs/utils')
loadEnv('test', process.cwd())

module.exports = {
  transform: {
    "^.+\\.[jt]s$": [
      "@swc/jest",
      {
        jsc: {
          parser: { syntax: "typescript", decorators: true },
        },
      },
    ],
  },
  testEnvironment: "node",
  moduleFileExtensions: ["js", "ts", "json"],
  modulePathIgnorePatterns: ["dist/"],
}

if (process.env.TEST_TYPE === "integration:http") {
  module.exports.testMatch = ["**/integration-tests/http/*.spec.[jt]s"]
} else if (process.env.TEST_TYPE === "integration:modules") {
  module.exports.testMatch = ["**/src/modules/*/__tests__/**/*.[jt]s"]
} else if (process.env.TEST_TYPE === "unit") {
  module.exports.testMatch = ["**/src/**/__tests__/**/*.unit.spec.[jt]s"]
}