test: add test for typescript config file

fix web-infra-dev#2188

.changeset/moody-cameras-act.md

@@ -0,0 +1,5 @@
+---
+"@rspack/cli": minor
+---
+
+Support TypeScript as configuration file.

packages/rspack-cli/tests/build/typescript/main.ts

@@ -0,0 +1 @@
+console.log("Main typescript file");

packages/rspack-cli/tests/build/typescript/rspack.config.ts

@@ -0,0 +1,12 @@
+import * as path from "path";
+
+const config = {
+	mode: "production",
+	entry: "./main.ts",
+	output: {
+		path: path.resolve(__dirname, "dist"),
+		filename: "foo.bundle.js",
+	},
+};
+
+export = config;

packages/rspack-cli/tests/build/typescript/tsconfig.json

@@ -0,0 +1,5 @@
+{
+  "compilerOptions": {
+    "module": "commonjs"
+  }
+}

packages/rspack-cli/tests/build/typescript/typescript.test.ts

@@ -0,0 +1,26 @@
+import { run } from "../../utils/test-utils";
+import { existsSync } from "fs";
+import { resolve } from "path";
+
+describe("webpack cli", () => {
+  it("should support default config in typescript", async () => {
+    const { exitCode, stderr, stdout } = await run(__dirname, []);
+
+    expect(stderr).toBeFalsy();
+    expect(stdout).toBeTruthy();
+    expect(exitCode).toBe(0);
+    expect(existsSync(resolve(__dirname, "dist/foo.bundle.js"))).toBeTruthy();
+  });
+
+  it("should support specifying config in typescript", async () => {
+    const { exitCode, stderr, stdout } = await run(__dirname, [
+			"-c",
+			"./rspack.config.ts"
+		]);
+
+    expect(stderr).toBeFalsy();
+    expect(stdout).toBeTruthy();
+    expect(exitCode).toBe(0);
+    expect(existsSync(resolve(__dirname, "dist/foo.bundle.js"))).toBeTruthy();
+  });
+});