feat: add --help integration test (#5434)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

Author: jsjoeio

test/integration/help.test.ts

@@ -0,0 +1,13 @@
+import { runCodeServerCommand } from "../utils/runCodeServerCommand"
+
+// NOTE@jsjoeio
+// We have this test to ensure that native modules
+// work as expected. If this is called on the wrong
+// platform, the test will fail.
+describe("--help", () => {
+  it("should list code-server usage", async () => {
+    const expectedOutput = "Usage: code-server [options] [path]"
+    const { stdout } = await runCodeServerCommand(["--help"])
+    expect(stdout).toMatch(expectedOutput)
+  }, 20000)
+})