<?

final class RangeUnitTest extends TestCase {

  function testValidOffset() {
    $range = new Range(1, 1);
    $offset = $range->offset();
    $this->assertTrue(10 == $offset);    
    //No functional essential description :(
    //Accidental description provided by tests is very bad
  }  
}

// When failing Unit framework will show us
//
// 1 Test, 1 failed
// Failing asserting true matches expected false :(
// () <-- no business description :(
//
// <Click to see difference> - Two booleans
// (and a diff comparator will show us two booleans)

<?

final class RangeUnitTest extends TestCase {

  function testValidOffset() {
    $range = new Range(1, 1);
    $offset = $range->offset();
    $this->assertEquals(10, $offset, 'All pages must have 10 as offset');    
    //Expected value should always be first argument
    //We add a functional essential description 
    //to complement accidental description provided by tests
  }  
}

// When failing Unit framework will show us
//
// 1 Test, 1 failed
// Failing asserting 0 matches expected 10
// All pages must have 10 as offset <-- business description
//
// <Click to see difference> 
// (and a diff comparator will help us and it will be a great help
// for complex objects like objects or jsons)