Minimal JavaScript test setup

test.js

#!/usr/bin/env node
/*!
 * Copyright (c) 2020 Xvezda <xvezda@naver.com>
 *
 * Use of this source code is governed by an MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT.
 */

function ordinal(i) {
  if (Number.isNaN()) throw TypeError('argument is not a number');
  if (i <= 0) throw Error('argument is smaller than 1');
  return i + (['st', 'nd', 'rd'][i-1] || 'th');
}

function tests() {
  var i;

  for (i = 0; i < arguments.length; ++i) {
    if (i) console.log();

    var test = arguments[i];
    if (typeof test !== 'function') {
      console.error(ordinal(i+1) + ' testcase is not a function');
      continue;
    }

    var testString = test.toString();
    var testName;
    if (testString.startsWith('function') && (testName=testString.slice(8, testString.indexOf('(')).trim())) {
      console.log(testName + ' is running');
    } else {
      console.log(ordinal(i+1) + ' testcase is running');
    }
    try {
      test();
    } catch (e) {
      console.error(e.name + ': ' + e.message);
      continue;
    }
  }
}

tests(
  undefined,
  function() {
    console.assert(1 === 1);
  },
  function named() {
    console.assert(1 === 1);
  },
  function() {
    console.assert(1 === 0, '1 is not equal to 0');
  },
  function namedError() {
    console.assert(1 === 0, '1 is not equal to 0');
  },
  function() {
    throw Error('BOOM!');
  }
);

test.sh

#!/bin/sh

# node test.js 2>&1 >/dev/null | grep '.' && echo failed || echo passed
node test.js 2>&1 >/dev/null | grep '.' && exit 1 || exit 0

output

1st testcase is not a function
2nd testcase is running
named is running
4th testcase is running
Assertion failed: 1 is not equal to 0
namedError is running
Assertion failed: 1 is not equal to 0