fix(browser): open tabs via CDP websocket

src/browser/cdp.test.ts

@@ -0,0 +1,73 @@
+import { createServer } from "node:http";
+
+import { afterEach, describe, expect, it } from "vitest";
+import { WebSocketServer } from "ws";
+
+import { createTargetViaCdp } from "./cdp.js";
+
+describe("cdp", () => {
+  let httpServer: ReturnType<typeof createServer> | null = null;
+  let wsServer: WebSocketServer | null = null;
+
+  afterEach(async () => {
+    await new Promise<void>((resolve) => {
+      if (!httpServer) return resolve();
+      httpServer.close(() => resolve());
+      httpServer = null;
+    });
+    await new Promise<void>((resolve) => {
+      if (!wsServer) return resolve();
+      wsServer.close(() => resolve());
+      wsServer = null;
+    });
+  });
+
+  it("creates a target via the browser websocket", async () => {
+    wsServer = new WebSocketServer({ port: 0, host: "127.0.0.1" });
+    await new Promise<void>((resolve) => wsServer?.once("listening", resolve));
+    const wsPort = (wsServer.address() as { port: number }).port;
+
+    wsServer.on("connection", (socket) => {
+      socket.on("message", (data) => {
+        const msg = JSON.parse(String(data)) as {
+          id?: number;
+          method?: string;
+          params?: { url?: string };
+        };
+        if (msg.method !== "Target.createTarget") return;
+        socket.send(
+          JSON.stringify({
+            id: msg.id,
+            result: { targetId: "TARGET_123" },
+          }),
+        );
+      });
+    });
+
+    httpServer = createServer((req, res) => {
+      if (req.url === "/json/version") {
+        res.setHeader("content-type", "application/json");
+        res.end(
+          JSON.stringify({
+            webSocketDebuggerUrl: `ws://127.0.0.1:${wsPort}/devtools/browser/TEST`,
+          }),
+        );
+        return;
+      }
+      res.statusCode = 404;
+      res.end("not found");
+    });
+
+    await new Promise<void>((resolve) =>
+      httpServer?.listen(0, "127.0.0.1", resolve),
+    );
+    const httpPort = (httpServer.address() as { port: number }).port;
+
+    const created = await createTargetViaCdp({
+      cdpPort: httpPort,
+      url: "https://example.com",
+    });
+
+    expect(created.targetId).toBe("TARGET_123");
+  });
+});