Switch main's route handlers to be static functions (#2712)

src/main/__test__/router.test.ts

@@ -1,40 +1,42 @@
 import { Router } from "../router";
 
-const staticRoot = __dirname;
-
-class TestRouter extends Router {
-  protected resolveStaticRootPath() {
-    return staticRoot;
-  }
-}
-
 describe("Router", () => {
   it("blocks path traversal attacks", async () => {
-    const router = new TestRouter();
-    const res = {
+    const response: any = {
       statusCode: 200,
       end: jest.fn()
     };
 
-    await router.handleStaticFile("../index.ts", res as any, {} as any, 0);
+    await (Router as any).handleStaticFile({
+      params: {
+        path: "../index.ts",
+      },
+      response,
+      raw: {},
+    });
 
-    expect(res.statusCode).toEqual(404);
+    expect(response.statusCode).toEqual(404);
   });
 
   it("serves files under static root", async () => {
-    const router = new TestRouter();
-    const res = {
+    const response: any = {
       statusCode: 200,
       write: jest.fn(),
       setHeader: jest.fn(),
       end: jest.fn()
     };
-    const req = {
+    const req: any = {
       url: ""
     };
 
-    await router.handleStaticFile("router.test.ts", res as any, req as any, 0);
+    await (Router as any).handleStaticFile({
+      params: {
+        path: "router.test.ts",
+      },
+      response,
+      raw: { req },
+    });
 
-    expect(res.statusCode).toEqual(200);
+    expect(response.statusCode).toEqual(200);
   });
 });