test(electron): add unit tests for updater (#5439)

packages/frontend/electron/test/main/mocks/http-executor.ts

@@ -0,0 +1,26 @@
+import http from 'node:https';
+
+import { HttpExecutor } from 'builder-util-runtime';
+import type { ClientRequest } from 'electron';
+
+/**
+ * For testing and same as:
+ * https://github.com/electron-userland/electron-builder/blob/master/packages/electron-updater/src/electronHttpExecutor.ts
+ */
+export class MockedHttpExecutor extends HttpExecutor<ClientRequest> {
+  createRequest(
+    options: any,
+    callback: (response: any) => void
+  ): ClientRequest {
+    if (options.headers && options.headers.Host) {
+      // set host value from headers.Host
+      options.host = options.headers.Host;
+      // remove header property 'Host', if not removed causes net::ERR_INVALID_ARGUMENT exception
+      delete options.headers.Host;
+    }
+
+    const request = http.request(options);
+    request.on('response', callback);
+    return request as unknown as ClientRequest;
+  }
+}