webpack/test/Compiler.test.js

/* globals describe, it */
"use strict";

const should = require("should");
const path = require("path");
const sinon = require("sinon");

const webpack = require("../");
const WebpackOptionsDefaulter = require("../lib/WebpackOptionsDefaulter");
const Compiler = require("../lib/Compiler");

describe("Compiler", () => {
	function compile(entry, options, callback) {
		const noOutputPath = !options.output || !options.output.path;
		options = new WebpackOptionsDefaulter().process(options);
		options.entry = entry;
		options.context = path.join(__dirname, "fixtures");
		if(noOutputPath) options.output.path = "/";
		options.output.pathinfo = true;
		const logs = {
			mkdirp: [],
			writeFile: [],
		};

		const c = webpack(options);
		const files = {};
		c.outputFileSystem = {
			join: function() {
				return [].join.call(arguments, "/").replace(/\/+/g, "/");
			},
			mkdirp: function(path, callback) {
				logs.mkdirp.push(path);
				callback();
			},
			writeFile: function(name, content, callback) {
				logs.writeFile.push(name, content);
				files[name] = content.toString("utf-8");
				callback();
			}
		};
		c.plugin("compilation", (compilation) => compilation.bail = true);
		c.run((err, stats) => {
			if(err) throw err;
			should.strictEqual(typeof stats, "object");
			const compilation = stats.compilation;
			stats = stats.toJson({
				modules: true,
				reasons: true
			});
			should.strictEqual(typeof stats, "object");
			stats.should.have.property("errors");
			Array.isArray(stats.errors).should.be.ok();
			if(stats.errors.length > 0) {
				stats.errors[0].should.be.instanceOf(Error);
				throw stats.errors[0];
			}
			stats.logs = logs;
			callback(stats, files, compilation);
		});
	}

	it("should compile a single file to deep output", (done) => {
		compile("./c", {
			output: {
				path: "/what",
				filename: "the/hell.js",
			}
		}, (stats, files) => {
			stats.logs.mkdirp.should.eql([
				"/what",
				"/what/the",
			]);
			done();
		});
	});

	it("should compile a single file", (done) => {
		compile("./c", {}, (stats, files) => {
			files.should.have.property("/main.js").have.type("string");
			Object.keys(files).should.be.eql(["/main.js"]);
			const bundle = files["/main.js"];
			bundle.should.containEql("function __webpack_require__(");
			bundle.should.containEql("__webpack_require__(/*! ./a */ 1);");
			bundle.should.containEql("./c.js");
			bundle.should.containEql("./a.js");
			bundle.should.containEql("This is a");
			bundle.should.containEql("This is c");
			bundle.should.not.containEql("2: function(");
			bundle.should.not.containEql("window");
			bundle.should.not.containEql("jsonp");
			bundle.should.not.containEql("fixtures");
			done();
		});
	});

	it("should compile a complex file", (done) => {
		compile("./main1", {}, (stats, files) => {
			files.should.have.property("/main.js").have.type("string");
			Object.keys(files).should.be.eql(["/main.js"]);
			const bundle = files["/main.js"];
			bundle.should.containEql("function __webpack_require__(");
			bundle.should.containEql("__webpack_require__(/*! ./a */");
			bundle.should.containEql("./main1.js");
			bundle.should.containEql("./a.js");
			bundle.should.containEql("./b.js");
			bundle.should.containEql("./node_modules/m1/a.js");
			bundle.should.containEql("This is a");
			bundle.should.containEql("This is b");
			bundle.should.containEql("This is m1/a");
			bundle.should.not.containEql("4: function(");
			bundle.should.not.containEql("window");
			bundle.should.not.containEql("jsonp");
			bundle.should.not.containEql("fixtures");
			done();
		});
	});

	it("should compile a file with transitive dependencies", (done) => {
		compile("./abc", {}, (stats, files) => {
			files.should.have.property("/main.js").have.type("string");
			Object.keys(files).should.be.eql(["/main.js"]);
			const bundle = files["/main.js"];
			bundle.should.containEql("function __webpack_require__(");
			bundle.should.containEql("__webpack_require__(/*! ./a */");
			bundle.should.containEql("__webpack_require__(/*! ./b */");
			bundle.should.containEql("__webpack_require__(/*! ./c */");
			bundle.should.containEql("./abc.js");
			bundle.should.containEql("./a.js");
			bundle.should.containEql("./b.js");
			bundle.should.containEql("./c.js");
			bundle.should.containEql("This is a");
			bundle.should.containEql("This is b");
			bundle.should.containEql("This is c");
			bundle.should.not.containEql("4: function(");
			bundle.should.not.containEql("window");
			bundle.should.not.containEql("jsonp");
			bundle.should.not.containEql("fixtures");
			done();
		});
	});

	it("should compile a file with multiple chunks", (done) => {
		compile("./chunks", {}, (stats, files) => {
			stats.chunks.length.should.be.eql(2);
			files.should.have.property("/main.js").have.type("string");
			files.should.have.property("/0.js").have.type("string");
			Object.keys(files).should.be.eql(["/0.js", "/main.js"]);
			const bundle = files["/main.js"];
			const chunk = files["/0.js"];
			bundle.should.containEql("function __webpack_require__(");
			bundle.should.containEql("__webpack_require__(/*! ./b */");
			chunk.should.not.containEql("__webpack_require__(/* ./b */");
			bundle.should.containEql("./chunks.js");
			chunk.should.containEql("./a.js");
			chunk.should.containEql("./b.js");
			chunk.should.containEql("This is a");
			bundle.should.not.containEql("This is a");
			chunk.should.containEql("This is b");
			bundle.should.not.containEql("This is b");
			bundle.should.not.containEql("4: function(");
			bundle.should.not.containEql("fixtures");
			chunk.should.not.containEql("fixtures");
			bundle.should.containEql("webpackJsonp");
			chunk.should.containEql("window[\"webpackJsonp\"] || []).push");
			done();
		});
	});
	describe("constructor", () => {
		let compiler;
		beforeEach(() => {
			compiler = webpack({
				entry: "./c",
				context: path.join(__dirname, "fixtures"),
				output: {
					path: "/",
					pathinfo: true,
				}
			});
		});
		describe("parser", () => {
			describe("apply", () => {
				it("invokes sets a 'compilation' plugin", (done) => {
					compiler.plugin = sinon.spy();
					compiler.parser.apply();
					compiler.plugin.callCount.should.be.exactly(1);
					done();
				});
			});
		});
	});
	describe("methods", () => {
		let compiler;
		beforeEach(() => {
			compiler = webpack({
				entry: "./c",
				context: path.join(__dirname, "fixtures"),
				output: {
					path: "/",
					pathinfo: true,
				}
			});
		});
		describe("purgeInputFileSystem", () => {
			it("invokes purge() if inputFileSystem.purge", (done) => {
				const mockPurge = sinon.spy();
				compiler.inputFileSystem = {
					purge: mockPurge,
				};
				compiler.purgeInputFileSystem();
				mockPurge.callCount.should.be.exactly(1);
				done();
			});
			it("does NOT invoke purge() if !inputFileSystem.purge", (done) => {
				const mockPurge = sinon.spy();
				compiler.inputFileSystem = null;
				compiler.purgeInputFileSystem();
				mockPurge.callCount.should.be.exactly(0);
				done();
			});
		});
		describe("isChild", () => {
			it("returns booleanized this.parentCompilation", (done) => {
				compiler.parentCompilation = "stringyStringString";
				const response1 = compiler.isChild();
				response1.should.be.exactly(true);

				compiler.parentCompilation = 123456789;
				const response2 = compiler.isChild();
				response2.should.be.exactly(true);

				compiler.parentCompilation = {
					what: "I belong to an object"
				};
				const response3 = compiler.isChild();
				response3.should.be.exactly(true);

				compiler.parentCompilation = ["Array", 123, true, null, [], () => {}];
				const response4 = compiler.isChild();
				response4.should.be.exactly(true);

				compiler.parentCompilation = false;
				const response5 = compiler.isChild();
				response5.should.be.exactly(false);

				compiler.parentCompilation = 0;
				const response6 = compiler.isChild();
				response6.should.be.exactly(false);

				compiler.parentCompilation = null;
				const response7 = compiler.isChild();
				response7.should.be.exactly(false);

				compiler.parentCompilation = "";
				const response8 = compiler.isChild();
				response8.should.be.exactly(false);

				compiler.parentCompilation = NaN;
				const response9 = compiler.isChild();
				response9.should.be.exactly(false);
				done();
			});
		});
	});
	describe("Watching", () => {
		let compiler;
		beforeEach(() => {
			compiler = webpack({
				entry: "./c",
				context: path.join(__dirname, "fixtures"),
				output: {
					path: "/",
					pathinfo: true,
				}
			});
		});
		describe("static method", () => {
			it("should have an method, Watching", (done) => {
				const actual = new Compiler.Watching(compiler, 1000, err => err);
				actual.running.should.be.exactly(true);
				actual.constructor.name.should.be.exactly("Watching");
				done();
			});
		});
		describe("constructor", () => {
			it("constructs Watching.watchOptions correctly when passed a number, string, or object for watchOptions", (done) => {
				const Watching1 = compiler.watch(1000, err => err);
				const Watching2 = compiler.watch({
					aggregateTimeout: 1000
				}, err => err);
				const Watching3 = compiler.watch("I am a string", err => err);
				Watching1.watchOptions.aggregateTimeout.should.equal(Watching2.watchOptions.aggregateTimeout);
				Watching3.watchOptions.aggregateTimeout.should.equal(200);
				done();
			});
			it("invokes compiler.readRecords", (done) => {
				compiler.readRecords = sinon.spy();
				compiler.watch(1000, err => err);
				compiler.readRecords.callCount.should.be.exactly(1);
				done();
			});
		});
		describe("_done", () => {
			it("invokes this.handler and turns this.running boolean to false when passed an error", (done) => {
				const mockHandler = sinon.spy();
				const Watching1 = compiler.watch(1000, mockHandler);
				Watching1.running.should.be.exactly(true);
				Watching1._done(Watching1.handler, false);
				mockHandler.callCount.should.be.exactly(1);
				Watching1.running.should.be.exactly(false);
				done();
			});
		});
		describe("invalidate", () => {
			it("pauses this.watcher and sets this.watcher to null if this.watcher is true", (done) => {
				const mockPause = sinon.spy();
				const Watching1 = compiler.watch(1000, err => err);
				Watching1.watcher = {
					pause: mockPause
				};
				Watching1.invalidate();
				mockPause.callCount.should.be.exactly(1);
				should(Watching1.watcher).be.exactly(null);
				done();
			});
			it("sets this.invalid to true if this.running is true, else this.invalid = false", (done) => {
				const Watching1 = compiler.watch(1000, err => err);
				Watching1.invalid = false;
				const response = Watching1.invalidate();
				Watching1.invalid.should.be.exactly(true);
				response.should.be.exactly(false);
				done();
			});
			it("invokes this._go() if !this.running", (done) => {
				const Watching1 = compiler.watch(1000, err => err);
				Watching1.running = false;
				Watching1._go = sinon.spy();
				Watching1.invalidate();
				Watching1._go.callCount.should.be.exactly(1);
				done();
			});
		});
	});
});