Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

<script id="jsbin-javascript">
function divisibleBy5(array) {
   function isFive(num){
  return num % 5===0;
}
  function fiver(numbers){
    return numbers.find(isFive);
  }
  return array.find(isFive);
}


/* From here down, you are not expected to
   understand.... for now :)


   Nothing to see here!

*/


// tests

function testFunctionWorks(fn, input, expected) {

  if (fn(input) === expected) {
    console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`');
    return true;
  }
  else {
    console.error(
      'FAILURE: `' + fn.name + '([' + input + '])` should be ' + expected +
      ' but was ' + fn(input)
    );
    return false;
  }
}

function runTests() {

  var input1 = [13, 22, 4, 47, 15, 35, 82];
  var result1 = 15;
  var input2 = [25, 20, 15, 10, 5];
  var result2 = 25;

  var testResults = [
    testFunctionWorks(divisibleBy5, input1, result1),
    testFunctionWorks(divisibleBy5, input2, result2),
  ];


  var numPassing = testResults.filter(function(result){ return result; }).length;
  console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
}

runTests();
</script>


<script id="jsbin-source-javascript" type="text/javascript">function divisibleBy5(array) {
   function isFive(num){
  return num % 5===0;
}
  function fiver(numbers){
    return numbers.find(isFive);
  }
  return array.find(isFive);
}


/* From here down, you are not expected to
   understand.... for now :)


   Nothing to see here!

*/


// tests

function testFunctionWorks(fn, input, expected) {

  if (fn(input) === expected) {
    console.log('SUCCESS: `' + fn.name + '` works on `[' + input + ']`');
    return true;
  }
  else {
    console.error(
      'FAILURE: `' + fn.name + '([' + input + '])` should be ' + expected +
      ' but was ' + fn(input)
    );
    return false;
  }
}

function runTests() {

  var input1 = [13, 22, 4, 47, 15, 35, 82];
  var result1 = 15;
  var input2 = [25, 20, 15, 10, 5];
  var result2 = 25;

  var testResults = [
    testFunctionWorks(divisibleBy5, input1, result1),
    testFunctionWorks(divisibleBy5, input2, result2),
  ];


  var numPassing = testResults.filter(function(result){ return result; }).length;
  console.log(numPassing + ' out of ' + testResults.length + ' tests passing.');
}

runTests();</script></body>
</html>