feat: add tests for node/util.open (#5256)

test/unit/node/util.test.ts

@@ -537,3 +537,10 @@ describe("isWsl", () => {
     })
   })
 })
+
+describe("open", () => {
+  it("should throw an error if address is a string", async () => {
+    const address = "localhost:3000"
+    await expect(util.open(address)).rejects.toThrow("Cannot open socket paths")
+  })
+})