Roman Numeral converter from OrlandoPHP meeting on 02/07/2013

main.php

<?php

class Roman_converter
{
  public $numerals = array(
    'I' => 1, 
    'II' => 2,
    'V' => 5, 
    'X' => 10,
    'L' => 50,
    'C' => 100,
    'D' => 500,
    'M' => 1000,
  );

  private $current_numeral;
  
  public function convert($numeral) {
    // 'I' => 1 
    // 'II' => 2
    if(strlen($numeral) == 1) {
      return $this->numerals[$numeral];
    }
    if(strlen($numeral) == 2) {
      return $this->numerals[$numeral[0]] + $this->numerals[$numeral[1]];
      
    }
    
  }
  
  public function getCurrentNumeral() {
    return $this->current_numeral;
  }  
  
  public function setCurrentNumeral($numeral) {
      $this->current_numeral = $numeral;
  }
}

test.php

<?php

require_once 'PHPUnit/Framework.php';
require_once 'main.php';

class Test extends PHPUnit_Framework_TestCase
{
    function test_convert_single_digits() {
      
      $concrete = new Roman_converter();
      
      $this->assertEquals(1,$concrete->convert('I'));
      $this->assertEquals(5, $concrete->convert('V'));
      $this->assertEquals(10, $concrete->convert('X'));
      $this->assertEquals(50, $concrete->convert('L'));
      $this->assertEquals(100, $concrete->convert('C'));
      $this->assertEquals(500, $concrete->convert('D'));
      $this->assertEquals(1000, $concrete->convert('M'));
    }
    
    function test_convert_with_multiples()
    {
      $c = new Roman_converter;
      
      $this->assertEquals(2, $c->convert('II'));
    }
    
    function test_class()
    {
      $class = class_exists('Roman_converter');
      $this->assertTrue($class);
      
      $this->concrete  = new Roman_converter;
      
      $numerals = isset($this->concrete->numerals);
      $this->assertTrue($numerals);
      
       
    }
       
    function test_numeralnotempty() {
      
      $this->concrete = new Roman_converter;
      
      $empty = is_null($this->concrete->getCurrentNumeral());
      $this->assertTrue($empty);
      
      $num = is_null($this->concrete->setCurrentNumeral("1"));
      
    }
    
      
}