fix bug which prevented some chunks to show up in Chunk.getAllAsyncCh…

…unks

fixes #6931

lib/Chunk.js

@@ -6,6 +6,7 @@
 
 const util = require("util");
 const SortableSet = require("./util/SortableSet");
+const intersect = require("./util/SetHelpers").intersect;
 const GraphHelpers = require("./GraphHelpers");
 let debugId = 1000;
 const ERR_CHUNK_ENTRY = "Chunk.entry was removed. Use hasRuntime()";
@@ -321,12 +322,15 @@ class Chunk {
 	}
 
 	getAllAsyncChunks() {
-		const initialChunks = new Set();
-		const queue = new Set(this.groupsIterable);
+		const queue = new Set();
 		const chunks = new Set();
 
-		for (const chunkGroup of queue) {
-			for (const chunk of chunkGroup.chunks) initialChunks.add(chunk);
+		const initialChunks = intersect(
+			Array.from(this.groupsIterable, g => new Set(g.chunks))
+		);
+
+		for (const chunkGroup of this.groupsIterable) {
+			for (const child of chunkGroup.childrenIterable) queue.add(child);
 		}
 
 		for (const chunkGroup of queue) {

test/ConfigTestCases.test.js

@@ -149,8 +149,18 @@ describe("ConfigTestCases", () => {
 							return test;
 						}
 
+						function _beforeEach(title, fn) {
+							return suite.beforeEach(title, fn);
+						}
+
+						function _afterEach(title, fn) {
+							return suite.afterEach(title, fn);
+						}
+
 						const globalContext = {
-							console: console
+							console: console,
+							setTimeout: setTimeout,
+							clearTimeout: clearTimeout
 						};
 
 						function _require(currentDirectory, module) {
@@ -175,15 +185,15 @@ describe("ConfigTestCases", () => {
 									options.target === "webworker"
 								) {
 									fn = vm.runInNewContext(
-										"(function(require, module, exports, __dirname, __filename, it, window) {" +
+										"(function(require, module, exports, __dirname, __filename, it, beforeEach, afterEach, window) {" +
 											content +
 											"\n})",
 										globalContext,
 										p
 									);
 								} else {
 									fn = vm.runInThisContext(
-										"(function(require, module, exports, __dirname, __filename, it) {" +
+										"(function(require, module, exports, __dirname, __filename, it, beforeEach, afterEach) {" +
 											content +
 											"\n})",
 										p
@@ -200,6 +210,8 @@ describe("ConfigTestCases", () => {
 									path.dirname(p),
 									p,
 									_it,
+									_beforeEach,
+									_afterEach,
 									globalContext
 								);
 								return m.exports;

test/configCases/split-chunks/runtime-chunk/a.js

@@ -0,0 +1,17 @@
+const should = require("should");
+const FakeDocument = require("../../../helpers/FakeDocument");
+
+beforeEach(() => {
+	global.document = new FakeDocument();
+});
+
+afterEach(() => {
+	delete global.document;
+})
+
+it("should be able to load the split chunk on demand", () => {
+	const promise = import(/* webpackChunkName: "shared" */ "./shared");
+
+	const script = document.head._children[0];
+	should(script.src).be.eql("dep~b~shared.js");
+});

test/configCases/split-chunks/runtime-chunk/b.js

@@ -0,0 +1 @@
+import "./shared";

test/configCases/split-chunks/runtime-chunk/test.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+	findBundle: function(i, options) {
+		return ["runtime.js", "a.js"];
+	}
+};

test/configCases/split-chunks/runtime-chunk/webpack.config.js

@@ -0,0 +1,24 @@
+const path = require("path");
+
+module.exports = {
+	entry: {
+		a: "./a",
+		b: "./b"
+	},
+	target: "web",
+	output: {
+		filename: "[name].js"
+	},
+	optimization: {
+		runtimeChunk: "single",
+		splitChunks: {
+			cacheGroups: {
+				dep: {
+					chunks: "all",
+					test: path.resolve(__dirname, "shared.js"),
+					enforce: true
+				}
+			}
+		}
+	}
+};

test/helpers/FakeDocument.js

@@ -0,0 +1,36 @@
+module.exports = class FakeDocument {
+	constructor() {
+		this.head = this.createElement("head");
+	}
+
+	createElement(type) {
+		return new FakeElement(type);
+	}
+
+	getElementsByTagName(name) {
+		if (name === "head") return [this.head];
+		throw new Error(
+			`FakeDocument.getElementsByTagName(${name}): not implemented`
+		);
+	}
+};
+
+class FakeElement {
+	constructor(type) {
+		this._type = type;
+		this._children = [];
+		this._attributes = Object.create(null);
+	}
+
+	appendChild(node) {
+		this._children.push(node);
+	}
+
+	setAttribute(name, value) {
+		this._attributes[name] = value;
+	}
+
+	getAttribute(name) {
+		return this._attributes[name];
+	}
+}