test: add self-import test case for dynamic import (#20389)

xiaoxiaojx · web-flow · commit a656ab1fd106 · 2026-01-30T18:26:41.000+03:00
diff --git a/test/configCases/dynamic-import/self-import/index.js b/test/configCases/dynamic-import/self-import/index.js
@@ -0,0 +1,16 @@
+it("should allow to import itself", async () => {
+    // Dynamic import with self-import (e.g., import(import.meta.url)) does not create duplicate ChunkGroups
+    // because the module is already in parent chunks, so it enters the skip logic at buildChunkGraph.js:734-738
+    // (isOrdinalSetInMask check returns true).
+	const module = await import(import.meta.url);
+	expect(module).toBeDefined();
+});
+
+it("should allow to import itself with new URL", async (done) => {
+	import(new URL(import.meta.url)).catch(e => {
+        // import with new URL will create a ContextModule with critical flag
+        // ContextModule will throw MODULE_NOT_FOUND
+        expect(e.code).toBe("MODULE_NOT_FOUND");
+        done();
+    });
+});
diff --git a/test/configCases/dynamic-import/self-import/test.config.js b/test/configCases/dynamic-import/self-import/test.config.js
@@ -0,0 +1,16 @@
+"use strict";
+
+module.exports = {
+	findBundle(i) {
+		switch (i) {
+			case 0:
+				return [`bundle${i}.js`];
+			case 1:
+				return [`runtime.bundle${i}.js`, `main.bundle${i}.js`];
+			case 2:
+				return [`bundle${i}.mjs`];
+			case 3:
+				return [`runtime.bundle${i}.mjs`, `main.bundle${i}.mjs`];
+		}
+	}
+};
diff --git a/test/configCases/dynamic-import/self-import/warnings.js b/test/configCases/dynamic-import/self-import/warnings.js
@@ -0,0 +1,8 @@
+"use strict";
+
+module.exports = [
+	/Critical dependency: the request of a dependency is an expression/,
+	/Critical dependency: the request of a dependency is an expression/,
+	/Critical dependency: the request of a dependency is an expression/,
+	/Critical dependency: the request of a dependency is an expression/
+];
diff --git a/test/configCases/dynamic-import/self-import/webpack.config.js b/test/configCases/dynamic-import/self-import/webpack.config.js
@@ -0,0 +1,35 @@
+"use strict";
+
+/** @type {import("../../../../").Configuration[]} */
+module.exports = [
+	{
+		target: "web"
+	},
+	{
+		output: {
+			filename: "[name].bundle1.js"
+		},
+		target: "web",
+		optimization: {
+			runtimeChunk: "single"
+		}
+	},
+	{
+		target: "web",
+		experiments: {
+			outputModule: true
+		}
+	},
+	{
+		target: "web",
+		output: {
+			filename: "[name].bundle3.mjs"
+		},
+		optimization: {
+			runtimeChunk: "single"
+		},
+		experiments: {
+			outputModule: true
+		}
+	}
+];
