From 6382a6653b887bb3ae648a73de0a7434e2a3d9de Mon Sep 17 00:00:00 2001
From: Qingyu Wang <40660121+colinaaa@users.noreply.github.com>
Date: Fri, 14 Mar 2025 21:26:17 +0800
Subject: [PATCH] fix: add `strict: true` to ContextModule

---
 lib/ContextModule.js                          |  1 +
 .../context-module/index.mjs                  | 41 +++++++++++++++++++
 .../context-module/infrastructure-log.js      |  7 ++++
 .../context-module/sub/a.js                   |  1 +
 .../context-module/webpack.config.js          |  6 +++
 5 files changed, 56 insertions(+)
 create mode 100644 test/configCases/concatenate-modules/context-module/index.mjs
 create mode 100644 test/configCases/concatenate-modules/context-module/infrastructure-log.js
 create mode 100644 test/configCases/concatenate-modules/context-module/sub/a.js
 create mode 100644 test/configCases/concatenate-modules/context-module/webpack.config.js

diff --git a/lib/ContextModule.js b/lib/ContextModule.js
index 9dfa3c8ba..abe680704 100644
--- a/lib/ContextModule.js
+++ b/lib/ContextModule.js
@@ -435,6 +435,7 @@ class ContextModule extends Module {
 			defaultObject: "redirect-warn"
 		};
 		this.buildInfo = {
+			strict: true,
 			snapshot: undefined
 		};
 		this.dependencies.length = 0;
diff --git a/test/configCases/concatenate-modules/context-module/index.mjs b/test/configCases/concatenate-modules/context-module/index.mjs
new file mode 100644
index 000000000..268e134ff
--- /dev/null
+++ b/test/configCases/concatenate-modules/context-module/index.mjs
@@ -0,0 +1,41 @@
+/** @type {import('fs')} */
+const fs = __non_webpack_require__("fs");
+
+it("should import", async () => {
+	const n = "a.js";
+	const { default: a1 } = await import(`./sub/${n}`);
+	expect(a1).toBe("a");
+});
+
+it("should startsWith use strict", async () => {
+	const source = fs.readFileSync(__filename, "utf-8");
+	expect(source.length).not.toBe(0);
+	expect(source.startsWith('/******/ "use strict"')).toBeTruthy();
+});
+
+it("should have all strict modules", () => {
+	const source = fs.readFileSync(__filename, "utf-8");
+	expect(source.length).not.toBe(0);
+
+	expect(source).not.toContain(
+		[
+			"This",
+			"entry",
+			"needs",
+			"to",
+			"be",
+			"wrapped",
+			"in",
+			"an",
+			"IIFE",
+			"because",
+			"it",
+			"needs",
+			"to",
+			"be",
+			"in",
+			"strict",
+			"mode."
+		].join(" ")
+	);
+});
diff --git a/test/configCases/concatenate-modules/context-module/infrastructure-log.js b/test/configCases/concatenate-modules/context-module/infrastructure-log.js
new file mode 100644
index 000000000..10532afb6
--- /dev/null
+++ b/test/configCases/concatenate-modules/context-module/infrastructure-log.js
@@ -0,0 +1,7 @@
+module.exports = options => {
+	if (options.cache && options.cache.type === "filesystem") {
+		return [/Pack got invalid because of write to/];
+	}
+
+	return [];
+};
diff --git a/test/configCases/concatenate-modules/context-module/sub/a.js b/test/configCases/concatenate-modules/context-module/sub/a.js
new file mode 100644
index 000000000..3ea9a15ea
--- /dev/null
+++ b/test/configCases/concatenate-modules/context-module/sub/a.js
@@ -0,0 +1 @@
+export default "a"
diff --git a/test/configCases/concatenate-modules/context-module/webpack.config.js b/test/configCases/concatenate-modules/context-module/webpack.config.js
new file mode 100644
index 000000000..a5ea1d099
--- /dev/null
+++ b/test/configCases/concatenate-modules/context-module/webpack.config.js
@@ -0,0 +1,6 @@
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	entry: "./index.mjs",
+	output: { iife: false },
+	optimization: { concatenateModules: true }
+};