deno: add some simple tests

  '';

  passthru.updateScript = ./update/update.ts;

  passthru.tests = callPackage ./tests { };

  meta = with lib; {

    homepage = "https://deno.land/";

console.log(1 + 1)

{ deno, runCommand, lib, testers }:

let

  testDenoRun =

    name:

    { args ? ""

    , dir ? ./. + "/${name}"

    , file ? "index.ts"

    , expected ? ""

    , expectFailure ? false

    }:

    let

      command = "deno run ${args} ${dir}/${file}";

    in

    runCommand "deno-test-${name}" { nativeBuildInputs = [ deno ]; meta.timeout = 60; } ''

      HOME=$(mktemp -d)

      if output=$(${command} 2>&1); then

        if [[ $output =~ '${expected}' ]]; then

          echo "Test '${name}' passed"

          touch $out

        else

          echo -n ${lib.escapeShellArg command} >&2

          echo " output did not match what was expected." >&2

          echo "The expected was:" >&2

          echo '${expected}' >&2

          echo "The output was:" >&2

          echo "$output" >&2

          exit 1

        fi

      else

        if [[ "${toString expectFailure}" == "1" ]]; then

          echo "Test '${name}' failed as expected"

          touch $out

          exit 0

        fi

        echo -n ${lib.escapeShellArg command} >&2

        echo " returned a non-zero exit code." >&2

        echo "$output" >&2

        exit 1

      fi

    '';

in

(lib.mapAttrs testDenoRun {

  basic = {

    dir = ./.;

    file = "basic.ts";

    expected = "2";

  };

  import-json = {

    expected = "hello from JSON";

  };

  import-ts = {

    expected = "hello from ts";

  };

  read-file = {

    args = "--allow-read";

    expected = "hello from a file";

  };

  fail-read-file = {

    expectFailure = true;

    dir = ./read-file;

  };

}) //

{

  version = testers.testVersion {

    package = deno;

    command = "deno --version";

  };

}

{ "msg": "hello from JSON" }

import file from "./data.json" assert { type: "json" };

console.log(file.msg);