Saving JavaScript code to a variable in Postman

reuse-code.js

// Save common tests in a global variable
postman.setGlobalVariable("commonTests", () => {
  // The Content-Type must be JSON
  tests["Content-Type header is set"] = postman.getResponseHeader("Content-Type") === "application/json";

  // The response time must be less than 500 milliseconds
  tests["Response time is acceptable"] = responseTime < 500;

  // The response body must include an "id" property
  var data = JSON.parse(responseBody);
  tests["Response has an ID"] = data.id !== undefined;
});