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import { assert, assertEquals } from "../testing/asserts.ts";import { dirname, fromFileUrl } from "../path/mod.ts";
/** The utility for running "node/main.ts" with the given args */async function runNodeMain(...args: string[]) {  const p = Deno.run({    cmd: [      Deno.execPath(),      "run",      "--allow-read",      "--unstable",      "cli.ts",      ...args,    ],    stdout: "piped",    stderr: "piped",    cwd: dirname(fromFileUrl(new URL(import.meta.url))),  });
  const [status, output, stderrOutput] = await Promise.all([    p.status(),    p.output(),    p.stderrOutput(),  ]);
  const decoder = new TextDecoder();
  p.close();
  return {    status,    output: decoder.decode(output),    stderrOutput: decoder.decode(stderrOutput),  };}
Deno.test("[node/main] run node.js script", async () => {  const { status, output } = await runNodeMain("_module/example.js");  assertEquals(status.code, 0);  assertEquals(output, "  foo\n");});
Deno.test("[node/main] --help", async () => {  const { status, output } = await runNodeMain("--help");  assertEquals(status.code, 0);  assert(output.includes("Usage:"));});
Deno.test("[node/main] exec with no arg", async () => {  const { status, output } = await runNodeMain();  assertEquals(status.code, 1); // Error  assert(output.includes("Usage:")); // Shows the usage});