Test of various javascript isNumeric implementations

testIsNumeric.js

var shouldPass = [
  0xff,
  5e3,
  0,
  -1.1,
  37,
  3.14,

  1,
  1.1,
  10,
  10.10,
  100,
  -100,

  '-1.1',
  '0',
  '012',
  '0xff',
  '1',
  '1.1',
  '10',
  '10.10',
  '100',
  '5e3',

  Math.LN2,
  Number(1),
  new Number(1),

  // 012, Octal literal not allowed in strict mode
  parseInt('012'),
  parseFloat('012'),
  Math.abs(1),
  Math.acos(1),
  Math.asin(1),
  Math.atan(1),
  Math.atan2(1, 2),
  Math.ceil(1),
  Math.cos(1),
  Math.E,
  Math.exp(1),
  Math.floor(1),
  Math.LN10,
  Math.LN2,
  Math.log(1),
  Math.LOG10E,
  Math.LOG2E,
  Math.max(1, 2),
  Math.min(1, 2),
  Math.PI,
  Math.pow(1, 2),
  Math.pow(5, 5),
  Math.random(1),
  Math.round(1),
  Math.sin(1),
  Math.sqrt(1),
  Math.SQRT1_2,
  Math.SQRT2,
  Math.tan(1),

  Number.MAX_VALUE,
  Number.MIN_VALUE,
  
  "0.0",
  "0x0",
  "0e+5",
  "000",
  "0.0e-5",
  "0.0E5"
];

var shouldFail = [
  '3abc',
  'abc',
  'abc3',
  'null',
  'undefined',
  [1, 2, 3],
  [1],
  [],
  function () {},
  Infinity,
  NaN,
  new Array('abc'),
  new Array(0),
  new Array(2),
  null,
  undefined,
  {abc: 'abc'},
  {},
  ''
];

function testNumFunction(f) {
  var failures = shouldPass.filter(function(n) { return !f(n); })
    .concat(shouldFail.filter(f));
  if(failures.length) {
    console.log(failures);
    return false;
  }
  return true;
}

//jQuery 1.x
function isNumericJQ1(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
}

//jQuery 2.x
function isNumericJQ2(obj) {
  return !Array.isArray( obj ) && (obj - parseFloat( obj ) + 1) >= 0;
}

//npm isNumber
function isNumber(n) {
  return (!!(+n) && !Array.isArray(n)) && isFinite(n)
    || n === '0'
    || n === 0;
}

//modified npm isNumber
function isNumber2(n) {
  return !!(+('1'+n) || +(n+'1')) && !Array.isArray(n) && isFinite(n) && (n !== '');
}

testNumFunction(isNumericJQ1); // fails on [1]
testNumFunction(isNumericJQ2); // passes
testNumFunction(isNumber); // fails on ["0.0", "0x0", "0e+5", "000", "0.0e-5", "0.0E5"]
testNumFunction(isNumber2); // passes