chai-baseline adds simplified file-based baseline testing for chai. With it you can compare data to a reference file on disk, storing a local file in the process. This allows for the use of large-scale diff tools to do additional comparisons outside of the tests themselves.
npm install chai-baseline
chai-baseline can only be used in NodeJS where it has access to the file system.
// ES6 syntax (TypeScript, Babel)
import { use, expect } from "chai";
import chaiBaseline from "chai-baseline";
use(chaiBaseline);
// pre-ES6 syntax
var chai = require("chai"), expect = chai.expect;
var chaiBaseline = require("chai-baseline").default;
chai.use(chaiBaseline);
// usage
it("baseline", () => {
const text = "...output text...";
return expect(text).to.have.baseline("transpilerOutput.txt", { base: "./baselines" }); // returns Promise
});// ES6 syntax (TypeScript, Babel)
import { use, assert } from "chai";
import chaiBaseline from "chai-baseline";
use(chaiBaseline);
// pre-ES6 syntax
var chai = require("chai"), assert = chai.assert;
var chaiBaseline = require("chai-baseline").default;
chai.use(chaiBaseline);
// usage
it("baseline", () => {
const text = "...output text...";
return assert.baseline(text, "transpilerOutput.txt", { base: "./baselines" }); // returns Promise
});
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