webpack/test/StatsTestCases.test.js

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

const path = require("path");
const fs = require("fs");

const webpack = require("../lib/webpack");
const Stats = require("../lib/Stats");

const base = path.join(__dirname, "statsCases");
const outputBase = path.join(__dirname, "js", "stats");
const tests = fs.readdirSync(base).filter(testName =>
	fs.existsSync(path.join(base, testName, "index.js")) ||
	fs.existsSync(path.join(base, testName, "webpack.config.js"))
);

describe("StatsTestCases", () => {
	tests.forEach(testName => {
		it("should print correct stats for " + testName, (done) => {
			jest.setTimeout(10000);
			let options = {
				mode: "development",
				entry: "./index",
				output: {
					filename: "bundle.js"
				}
			};
			if(fs.existsSync(path.join(base, testName, "webpack.config.js"))) {
				options = require(path.join(base, testName, "webpack.config.js"));
			}
			(Array.isArray(options) ? options : [options]).forEach((options) => {
				if(!options.context) options.context = path.join(base, testName);
				if(!options.output) options.output = options.output || {};
				if(!options.output.path) options.output.path = path.join(outputBase, testName);
				if(!options.plugins) options.plugins = [];
				if(!options.optimization) options.optimization = {};
				if(options.optimization.minimize === undefined) options.optimization.minimize = false;
				// To support deprecated loaders
				// TODO remove in webpack 5
				options.plugins.push(new webpack.LoaderOptionsPlugin({
					options: {}
				}));
			});
			const c = webpack(options);
			const compilers = c.compilers ? c.compilers : [c];
			compilers.forEach((c) => {
				const ifs = c.inputFileSystem;
				c.inputFileSystem = Object.create(ifs);
				c.inputFileSystem.readFile = function() {
					const args = Array.prototype.slice.call(arguments);
					const callback = args.pop();
					ifs.readFile.apply(ifs, args.concat([(err, result) => {
						if(err) return callback(err);
						callback(null, result.toString("utf-8").replace(/\r/g, ""));
					}]));
				};
				new webpack.optimize.OccurrenceOrderPlugin().apply(c);
			});
			c.run((err, stats) => {
				if(err) return done(err);

				if(/error$/.test(testName)) {
					expect(stats.hasErrors()).toBe(true);
				} else if(stats.hasErrors()) {
					return done(new Error(stats.toJson().errors.join("\n\n")));
				}

				let toStringOptions = {
					context: path.join(base, testName),
					colors: false
				};
				let hasColorSetting = false;
				if(typeof options.stats !== "undefined") {
					toStringOptions = options.stats;
					if(toStringOptions === null || typeof toStringOptions !== "object")
						toStringOptions = Stats.presetToOptions(toStringOptions);

					hasColorSetting = typeof options.stats.colors !== "undefined";
					if(!toStringOptions.context) toStringOptions.context = path.join(base, testName);
				}
				if(Array.isArray(options) && !toStringOptions.children) {
					toStringOptions.children = options.map(o => o.stats);
				}

				let actual = stats.toString(toStringOptions);
				expect(typeof actual).toBe("string");
				if(!hasColorSetting) {
					actual = actual
						.replace(/\u001b\[[0-9;]*m/g, "")
						.replace(/[0-9]+(\s?ms)/g, "X$1")
						.replace(/^(\s*Built at:) (.*)$/gm, "$1 Thu Jan 01 1970 00:00:00 GMT");
				} else {
					actual = actual
						.replace(/\u001b\[1m\u001b\[([0-9;]*)m/g, "<CLR=$1,BOLD>")
						.replace(/\u001b\[1m/g, "<CLR=BOLD>")
						.replace(/\u001b\[39m\u001b\[22m/g, "</CLR>")
						.replace(/\u001b\[([0-9;]*)m/g, "<CLR=$1>")
						.replace(/[0-9]+(<\/CLR>)?(\s?ms)/g, "X$1$2")
						.replace(/^(\s*Built at:) (.*)$/gm, "$1 Thu Jan 01 1970 <CLR=BOLD>00:00:00</CLR> GMT");
				}

				actual = actual
					.replace(/\r\n?/g, "\n")
					.replace(/[\t ]*Version:.+\n/g, "")
					.replace(path.join(base, testName), "Xdir/" + testName)
					.replace(/ dependencies:Xms/g, "");
				const expected = fs.readFileSync(path.join(base, testName, "expected.txt"), "utf-8").replace(/\r/g, "");
				if(actual !== expected) {
					fs.writeFileSync(path.join(base, testName, "actual.txt"), actual, "utf-8");
				} else if(fs.existsSync(path.join(base, testName, "actual.txt"))) {
					fs.unlinkSync(path.join(base, testName, "actual.txt"));
				}
				expect(actual).toBe(expected);
				done();
			});
		});
	});
});