Function drainExec

packages/computer/src/workspace.test.ts:187–189

(handle: { result(): Promise<unknown> })

// the WorkspaceShell push/pull bracket. The selection tests don't
// care about the values — only that exec ran on the right backend.
async function drainExec(handle: { result(): Promise<unknown> }): Promise<void> {
  await handle.result();
}

describe("Workspace backend selection", () => {
  it("picks the first backend in the list as the default", async () => {