prs.js

gistfile1.txt

function round(a, b) {
  if (arguments.length != 2){
    return "fail";
  }
  var matrix = {
    paper:{winsAgainst:"rock"},
    rock:{winsAgainst:"scissors"},
    scissors:{winsAgainst:"paper"}
  }
  
  var tempA = a;
  var tempB = b;
  
  a = a.toLowerCase();
  b = b.toLowerCase();

  if (a == b) {
    return 'tie';
  }

  if (matrix[a].winsAgainst == b) {
    return tempA;
  } else {
    return tempB;
  };
};

prs_spec.js

describe 'A roshambo round'

  it 'should take Paper and Rock and return Rock'
    var winner = round('Paper', 'Rock');
    winner.should_be('Paper');
    
  end
  
  it 'should take Rock and Paper and return Paper'
    winner = round('Rock', 'Paper');
    winner.should_be('Paper');
  end
  
  it 'should take Scissors and Paper and return Scissors'
    winner = round('Scissors', 'Paper');
    winner.should_be('Scissors');
  end
  
  it 'should take Paper and Scissors and return Scissors'
    winner = round('Paper', 'Scissors');
    winner.should_be('Scissors');
  end
  
  it 'should take Scissors and Rock and return Rock'
    winner = round('Scissors', 'Rock');
    winner.should_be('Rock');
  end
  
  it 'should take Rock and Scissors and return Rock'
    winner = round('Rock', 'Scissors');
    winner.should_be('Rock');
  end

  it 'should take rock and Scissors and return rock'
    round('rock', 'Scissors').should_be('rock');
  end

  it 'should take rock and rock and return tie'
    round('rock', 'rock').should_be('tie');
  end

  it 'should take no arguments and return fail'
    -{round()}.should.throw_error InvalidArgument,'Invalid arguments';
  end
end