Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    function modulo(x) {
      return x % 1 === 0;
    }
    
    function floor(x) {
      return Math.floor(x) === x;
    }
    
    var _floor = Math.floor;
    function cachedFloor(x) {
      return _floor(x) === x;
    }
    
    function bitwiseOr(x) {
      // fails for x > 2**31, x <= -2**31
      return x|0 === x;
    }
    
    function bitwiseRightShift(x) {
      return x >> 0 === x;
    }
    
    function assert(x) {
      if (!x) {
        throw Error();
      }
    }
    
    function test(func) {
      assert(func(0));
      assert(!func(0.5));
      assert(!func(-0.5));
      assert(func(1));
      assert(func(-1));
      assert(func(1234));
      assert(func(-1234));
      assert(func(1e10));
      assert(func(-1e10));
    }
  };
</script>

Test runner

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test(modulo);
 

test(floor);
 

test(cachedFloor);
 

test(bitwiseOr)

test(bitwiseRightShift)

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by ckknight on 26th January 2013
• Revision 2: published on 5th March 2013

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