DCC 12-2012

drive.js

describe('panda',function(){
  it('scalene',function(){
    expect(classify(1,2,3)).toBe('scalene');
  });
  
  it('isosceles', function() {
    expect(classify(2,2,3)).toBe('isosceles');
    expect(classify(1,2,2)).toBe('isosceles');
    expect(classify(2,1,2)).toBe('isosceles');
  });
  
  it('equilateral', function() {
    expect(classify(2,2,2)).toBe('equilateral');  
  });
});

factoryclassify.js

var classifiers = {
  triangle: function(triangle) { /* I'm scalene... err isoceles */ },
  square: function(square) { /* I'm a square... err rombus */ }
};

function triangle(s1,s2,s3) {
  return { 
    s1: s1,
    s2: s2,
    s3: s3,
    type: 'triangle'
  }
}

function classify(shape) {
  var classifiesthisshape = classifiers[shape.type];

  return classifiesthisshape(shape);
}

impl.js

function classifytriangle(s1, s2, s3) {
  if( s1 == s2 && s2 == s3 )
    return 'equilateral';
  
  if( s1 == s2 || s2 == s3 || s1 == s3)
    return 'isosceles';
    
  return 'scalene';
}

smartshapes.js

function quadrilateral(s1,s2,s3,s4) {
  return { 
    s1: s1,
    s2: s2,
    s3: s3,
    s4: s4,
    classify: function() { /* I'm a square... err rombus */ }
  };
}

function triangle(s1,s2,s3) {
  return { 
    s1: s1,
    s2: s2,
    s3: s3,
    classify: function() { /* I'm scalene... err isoceles */ }
  };
}