denoland-deno/cli/tests/unit/process_test.ts

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import {
  assert,
  assertEquals,
  assertStringIncludes,
  assertThrows,
  unitTest,
} from "./test_util.ts";

unitTest({ perms: { read: true } }, function runPermissions(): void {
  assertThrows(() => {
    Deno.run({ cmd: [Deno.execPath(), "eval", "console.log('hello world')"] });
  }, Deno.errors.PermissionDenied);
});

unitTest(
  { perms: { run: true, read: true } },
  async function runSuccess(): Promise<void> {
    const p = Deno.run({
      cmd: [Deno.execPath(), "eval", "console.log('hello world')"],
      stdout: "piped",
      stderr: "null",
    });
    const status = await p.status();
    assertEquals(status.success, true);
    assertEquals(status.code, 0);
    assertEquals(status.signal, undefined);
    p.stdout.close();
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runUrl(): Promise<void> {
    const p = Deno.run({
      cmd: [
        new URL(`file:///${Deno.execPath()}`),
        "eval",
        "console.log('hello world')",
      ],
      stdout: "piped",
      stderr: "null",
    });
    const status = await p.status();
    assertEquals(status.success, true);
    assertEquals(status.code, 0);
    assertEquals(status.signal, undefined);
    p.stdout.close();
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runStdinRid0(): Promise<
    void
  > {
    const p = Deno.run({
      cmd: [Deno.execPath(), "eval", "console.log('hello world')"],
      stdin: 0,
      stdout: "piped",
      stderr: "null",
    });
    const status = await p.status();
    assertEquals(status.success, true);
    assertEquals(status.code, 0);
    assertEquals(status.signal, undefined);
    p.stdout.close();
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  function runInvalidStdio(): void {
    assertThrows(() =>
      Deno.run({
        cmd: [Deno.execPath(), "eval", "console.log('hello world')"],
        // @ts-expect-error because Deno.run should throw on invalid stdin.
        stdin: "a",
      })
    );
    assertThrows(() =>
      Deno.run({
        cmd: [Deno.execPath(), "eval", "console.log('hello world')"],
        // @ts-expect-error because Deno.run should throw on invalid stdout.
        stdout: "b",
      })
    );
    assertThrows(() =>
      Deno.run({
        cmd: [Deno.execPath(), "eval", "console.log('hello world')"],
        // @ts-expect-error because Deno.run should throw on invalid stderr.
        stderr: "c",
      })
    );
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runCommandFailedWithCode(): Promise<void> {
    const p = Deno.run({
      cmd: [Deno.execPath(), "eval", "Deno.exit(41 + 1)"],
    });
    const status = await p.status();
    assertEquals(status.success, false);
    assertEquals(status.code, 42);
    assertEquals(status.signal, undefined);
    p.close();
  },
);

unitTest(
  {
    // No signals on windows.
    ignore: Deno.build.os === "windows",
    perms: { run: true, read: true },
  },
  async function runCommandFailedWithSignal(): Promise<void> {
    const p = Deno.run({
      cmd: [Deno.execPath(), "eval", "--unstable", "Deno.kill(Deno.pid, 9)"],
    });
    const status = await p.status();
    assertEquals(status.success, false);
    assertEquals(status.code, 128 + 9);
    assertEquals(status.signal, 9);
    p.close();
  },
);

unitTest({ perms: { run: true } }, function runNotFound(): void {
  let error;
  try {
    Deno.run({ cmd: ["this file hopefully doesn't exist"] });
  } catch (e) {
    error = e;
  }
  assert(error !== undefined);
  assert(error instanceof Deno.errors.NotFound);
});

unitTest(
  { perms: { write: true, run: true, read: true } },
  async function runWithCwdIsAsync(): Promise<void> {
    const enc = new TextEncoder();
    const cwd = await Deno.makeTempDir({ prefix: "deno_command_test" });

    const exitCodeFile = "deno_was_here";
    const programFile = "poll_exit.ts";
    const program = `
async function tryExit() {
  try {
    const code = parseInt(await Deno.readTextFile("${exitCodeFile}"));
    Deno.exit(code);
  } catch {
    // Retry if we got here before deno wrote the file.
    setTimeout(tryExit, 0.01);
  }
}

tryExit();
`;

    Deno.writeFileSync(`${cwd}/${programFile}`, enc.encode(program));
    const p = Deno.run({
      cwd,
      cmd: [Deno.execPath(), "run", "--allow-read", programFile],
    });

    // Write the expected exit code *after* starting deno.
    // This is how we verify that `run()` is actually asynchronous.
    const code = 84;
    Deno.writeFileSync(`${cwd}/${exitCodeFile}`, enc.encode(`${code}`));

    const status = await p.status();
    assertEquals(status.success, false);
    assertEquals(status.code, code);
    assertEquals(status.signal, undefined);
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runStdinPiped(): Promise<
    void
  > {
    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "if (new TextDecoder().decode(await Deno.readAll(Deno.stdin)) !== 'hello') throw new Error('Expected \\'hello\\'')",
      ],
      stdin: "piped",
    });
    assert(p.stdin);
    assert(!p.stdout);
    assert(!p.stderr);

    const msg = new TextEncoder().encode("hello");
    const n = await p.stdin.write(msg);
    assertEquals(n, msg.byteLength);

    p.stdin.close();

    const status = await p.status();
    assertEquals(status.success, true);
    assertEquals(status.code, 0);
    assertEquals(status.signal, undefined);
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runStdoutPiped(): Promise<
    void
  > {
    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "await Deno.stdout.write(new TextEncoder().encode('hello'))",
      ],
      stdout: "piped",
    });
    assert(!p.stdin);
    assert(!p.stderr);

    const data = new Uint8Array(10);
    let r = await p.stdout.read(data);
    if (r === null) {
      throw new Error("p.stdout.read(...) should not be null");
    }
    assertEquals(r, 5);
    const s = new TextDecoder().decode(data.subarray(0, r));
    assertEquals(s, "hello");
    r = await p.stdout.read(data);
    assertEquals(r, null);
    p.stdout.close();

    const status = await p.status();
    assertEquals(status.success, true);
    assertEquals(status.code, 0);
    assertEquals(status.signal, undefined);
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runStderrPiped(): Promise<
    void
  > {
    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "await Deno.stderr.write(new TextEncoder().encode('hello'))",
      ],
      stderr: "piped",
    });
    assert(!p.stdin);
    assert(!p.stdout);

    const data = new Uint8Array(10);
    let r = await p.stderr.read(data);
    if (r === null) {
      throw new Error("p.stderr.read should not return null here");
    }
    assertEquals(r, 5);
    const s = new TextDecoder().decode(data.subarray(0, r));
    assertEquals(s, "hello");
    r = await p.stderr.read(data);
    assertEquals(r, null);
    p.stderr!.close();

    const status = await p.status();
    assertEquals(status.success, true);
    assertEquals(status.code, 0);
    assertEquals(status.signal, undefined);
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runOutput(): Promise<void> {
    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "await Deno.stdout.write(new TextEncoder().encode('hello'))",
      ],
      stdout: "piped",
    });
    const output = await p.output();
    const s = new TextDecoder().decode(output);
    assertEquals(s, "hello");
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runStderrOutput(): Promise<
    void
  > {
    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "await Deno.stderr.write(new TextEncoder().encode('error'))",
      ],
      stderr: "piped",
    });
    const error = await p.stderrOutput();
    const s = new TextDecoder().decode(error);
    assertEquals(s, "error");
    p.close();
  },
);

unitTest(
  { perms: { run: true, write: true, read: true } },
  async function runRedirectStdoutStderr(): Promise<void> {
    const tempDir = await Deno.makeTempDir();
    const fileName = tempDir + "/redirected_stdio.txt";
    const file = await Deno.open(fileName, {
      create: true,
      write: true,
    });

    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "Deno.stderr.write(new TextEncoder().encode('error\\n')); Deno.stdout.write(new TextEncoder().encode('output\\n'));",
      ],
      stdout: file.rid,
      stderr: file.rid,
    });

    await p.status();
    p.close();
    file.close();

    const fileContents = await Deno.readFile(fileName);
    const decoder = new TextDecoder();
    const text = decoder.decode(fileContents);

    assertStringIncludes(text, "error");
    assertStringIncludes(text, "output");
  },
);

unitTest(
  { perms: { run: true, write: true, read: true } },
  async function runRedirectStdin(): Promise<void> {
    const tempDir = await Deno.makeTempDir();
    const fileName = tempDir + "/redirected_stdio.txt";
    const encoder = new TextEncoder();
    await Deno.writeFile(fileName, encoder.encode("hello"));
    const file = await Deno.open(fileName);

    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "if (new TextDecoder().decode(await Deno.readAll(Deno.stdin)) !== 'hello') throw new Error('Expected \\'hello\\'')",
      ],
      stdin: file.rid,
    });

    const status = await p.status();
    assertEquals(status.code, 0);
    p.close();
    file.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runEnv(): Promise<void> {
    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "Deno.stdout.write(new TextEncoder().encode(Deno.env.get('FOO') + Deno.env.get('BAR')))",
      ],
      env: {
        FOO: "0123",
        BAR: "4567",
      },
      stdout: "piped",
    });
    const output = await p.output();
    const s = new TextDecoder().decode(output);
    assertEquals(s, "01234567");
    p.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runClose(): Promise<void> {
    const p = Deno.run({
      cmd: [
        Deno.execPath(),
        "eval",
        "setTimeout(() => Deno.stdout.write(new TextEncoder().encode('error')), 10000)",
      ],
      stderr: "piped",
    });
    assert(!p.stdin);
    assert(!p.stdout);

    p.close();

    const data = new Uint8Array(10);
    const r = await p.stderr.read(data);
    assertEquals(r, null);
    p.stderr.close();
  },
);

unitTest(
  { perms: { run: true, read: true } },
  async function runKillAfterStatus(): Promise<void> {
    const p = Deno.run({
      cmd: [Deno.execPath(), "eval", 'console.log("hello")'],
    });
    await p.status();

    // On Windows the underlying Rust API returns `ERROR_ACCESS_DENIED`,
    // which serves kind of as a catch all error code. More specific
    // error codes do exist, e.g. `ERROR_WAIT_NO_CHILDREN`; it's unclear
    // why they're not returned.
    const expectedErrorType = Deno.build.os === "windows"
      ? Deno.errors.PermissionDenied
      : Deno.errors.NotFound;
    assertThrows(
      () => p.kill(Deno.Signal.SIGTERM),
      expectedErrorType,
    );

    p.close();
  },
);

unitTest(function signalNumbers(): void {
  if (Deno.build.os === "darwin") {
    assertEquals(Deno.Signal.SIGSTOP, 17);
  } else if (Deno.build.os === "linux") {
    assertEquals(Deno.Signal.SIGSTOP, 19);
  }
});

unitTest(function killPermissions(): void {
  assertThrows(() => {
    // Unlike the other test cases, we don't have permission to spawn a
    // subprocess we can safely kill. Instead we send SIGCONT to the current
    // process - assuming that Deno does not have a special handler set for it
    // and will just continue even if a signal is erroneously sent.
    Deno.kill(Deno.pid, Deno.Signal.SIGCONT);
  }, Deno.errors.PermissionDenied);
});

unitTest(
  { perms: { run: true, read: true } },
  async function killSuccess(): Promise<void> {
    const p = Deno.run({
      cmd: [Deno.execPath(), "eval", "setTimeout(() => {}, 10000)"],
    });

    assertEquals(Deno.Signal.SIGINT, 2);
    Deno.kill(p.pid, Deno.Signal.SIGINT);
    const status = await p.status();

    assertEquals(status.success, false);
    try {
      assertEquals(status.code, 128 + Deno.Signal.SIGINT);
      assertEquals(status.signal, Deno.Signal.SIGINT);
    } catch {
      // TODO(nayeemrmn): On Windows sometimes the following values are given
      // instead. Investigate and remove this catch when fixed.
      assertEquals(status.code, 1);
      assertEquals(status.signal, undefined);
    }
    p.close();
  },
);

unitTest({ perms: { run: true, read: true } }, function killFailed(): void {
  const p = Deno.run({
    cmd: [Deno.execPath(), "eval", "setTimeout(() => {}, 10000)"],
  });
  assert(!p.stdin);
  assert(!p.stdout);

  assertThrows(() => {
    Deno.kill(p.pid, 12345);
  }, TypeError);

  p.close();
});