bun.sh/test/cli/run/as-node.test.ts

import { describe, test, expect } from "bun:test";
import { bunExe, fakeNodeRun, tempDirWithFiles } from "../../harness";
import { join } from "path";

describe("fake node cli", () => {
  test("the node cli actually works", () => {
    const temp = tempDirWithFiles("fake-node", {
      "index.ts": "console.log(Bun.version)",
    });
    expect(fakeNodeRun(temp, join(temp, "index.ts")).stdout).toBe(Bun.version);
  });
  test("doesnt resolve bins", () => {
    const temp = tempDirWithFiles("fake-node", {
      "vite.js": "console.log('pass')",
      "node_modules/.bin/vite": "#!/usr/bin/sh\necho fail && exit 1",
    });
    expect(fakeNodeRun(temp, "vite").stdout).toBe("pass");
  });
  test("doesnt resolve scripts", () => {
    const temp = tempDirWithFiles("fake-node", {
      "vite.js": "console.log('pass')",
      "package.json": '{"scripts":{"vite":"echo fail && exit 1"}}',
    });
    expect(fakeNodeRun(temp, "vite").stdout).toBe("pass");
  });
  test("can run a script named run.js", () => {
    const temp = tempDirWithFiles("fake-node", {
      "run.js": "console.log('pass')",
      "run/index.js": "console.log('fail')",
      "node_modules/run/index.js": "console.log('fail')",
    });
    expect(fakeNodeRun(temp, "run").stdout).toBe("pass");
  });
  describe("entrypoint file extension picking", () => {
    // Bun supports JSX and TS, and node doesnt, so our behavior here differs a bit
    // Hopefully these priorization rules will not break any node apps.
    test("picks tsx over any other ext", () => {
      const temp = tempDirWithFiles("fake-node", {
        "build.js": "console.log('fail (build.js)')",
        "build.jsx": "console.log('fail (build.jsx)')",
        "build.cjs": "console.log('fail (build.cjs)')",
        "build.mjs": "console.log('fail (build.mjs)')",
        "build.ts": "console.log('fail (build.ts)')",
        "build.cts": "console.log('fail (build.cts)')",
        "build.mts": "console.log('fail (build.mts)')",
        "build.tsx": "console.log('pass')",
      });
      expect(fakeNodeRun(temp, "build").stdout).toBe("pass");
    });
    test("picks jsx over ts", () => {
      const temp = tempDirWithFiles("fake-node", {
        "build.js": "console.log('fail (build.js)')",
        "build.jsx": "console.log('pass')",
        "build.cjs": "console.log('fail (build.cjs)')",
        "build.mjs": "console.log('fail (build.mjs)')",
        "build.ts": "console.log('fail (build.ts)')",
        "build.cts": "console.log('fail (build.cts)')",
        "build.mts": "console.log('fail (build.mts)')",
      });
      expect(fakeNodeRun(temp, "build").stdout).toBe("pass");
    });
    test("picks mts over ts", () => {
      const temp = tempDirWithFiles("fake-node", {
        "build.js": "console.log('fail (build.js)')",
        "build.cjs": "console.log('fail (build.cjs)')",
        "build.mjs": "console.log('fail (build.mjs)')",
        "build.ts": "console.log('fail (build.ts)')",
        "build.cts": "console.log('fail (build.cts)')",
        "build.mts": "console.log('pass')",
      });
      expect(fakeNodeRun(temp, "build").stdout).toBe("pass");
    });
    test("picks ts over js/cjs/etc", () => {
      const temp = tempDirWithFiles("fake-node", {
        "build.js": "console.log('fail (build.js)')",
        "build.cjs": "console.log('fail (build.cjs)')",
        "build.mjs": "console.log('fail (build.mjs)')",
        "build.ts": "console.log('pass')",
        "build.cts": "console.log('fail (build.cts)')",
      });
      expect(fakeNodeRun(temp, "build").stdout).toBe("pass");
    });
  });

  test("node -e ", () => {
    const temp = tempDirWithFiles("fake-node", {});
    expect(fakeNodeRun(temp, ["-e", "console.log('pass')"]).stdout).toBe("pass");
  });

  test("process args work", () => {
    const temp = tempDirWithFiles("fake-node", {
      "index.js": "console.log(JSON.stringify(process.argv.slice(1)))",
    });
    expect(fakeNodeRun(temp, ["index", "a", "b", "c"]).stdout).toBe(
      // note: no extension here is INTENTIONAL
      JSON.stringify([join(temp, "index"), "a", "b", "c"]),
    );
  });

  test("no args is exit code zero for now", () => {
    const temp = tempDirWithFiles("fake-node", {});
    expect(() => fakeNodeRun(temp, [])).toThrow();
  });
});