overleaf/services/document-updater/test/unit/coffee/DiffCodec/DiffCodecTests.js

/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const sinon = require('sinon');
const chai = require('chai');
const should = chai.should();
const {
    expect
} = chai;
const modulePath = "../../../../app/js/DiffCodec.js";
const SandboxedModule = require('sandboxed-module');

describe("DiffCodec", function() {
	beforeEach(function() {
		this.callback = sinon.stub();
		return this.DiffCodec = SandboxedModule.require(modulePath);
	});

	return describe("diffAsShareJsOps", function() {
		it("should insert new text correctly", function(done) {
			this.before = ["hello world"];
			this.after  = ["hello beautiful world"];
			return this.DiffCodec.diffAsShareJsOp(this.before, this.after, function(error, ops) {
				expect(ops).to.deep.equal([{
					i: "beautiful ",
					p: 6
				}
				]);
				return done();
			});
		});

		it("should shift later inserts by previous inserts", function(done) {
			this.before = ["the boy played with the ball"];
			this.after  = ["the tall boy played with the red ball"];
			return this.DiffCodec.diffAsShareJsOp(this.before, this.after, function(error, ops) {
				expect(ops).to.deep.equal([
					{ i: "tall ", p: 4 },
					{ i: "red ", p: 29 }
				]);
				return done();
			});
		});

		it("should delete text correctly", function(done) {
			this.before  = ["hello beautiful world"];
			this.after = ["hello world"];
			return this.DiffCodec.diffAsShareJsOp(this.before, this.after, function(error, ops) {
				expect(ops).to.deep.equal([{
					d: "beautiful ",
					p: 6
				}
				]);
				return done();
			});
		});


		return it("should shift later deletes by the first deletes", function(done) {
			this.before = ["the tall boy played with the red ball"];
			this.after  = ["the boy played with the ball"];
			return this.DiffCodec.diffAsShareJsOp(this.before, this.after, function(error, ops) {
				expect(ops).to.deep.equal([
					{ d: "tall ", p: 4 },
					{ d: "red ", p: 24 }
				]);
				return done();
			});
		});
	});
});