How to execute code after trigger_error(..., E_USER_WARNING) in unit test (PHPUnit)?

Question

I have code like this:

class ToBeTested
{
  function simpleMethod($param)
  {
    if(0 === $param)
    {
      trigger_error("Param is 0!", E_USER_WARNING);
      return false;
    }

    return true;
  }
}

and test for this code:

class SimpleTest extends PHPUnit_Framework_TestCase
{
   function testSimpleMethod()
   {
     $toBeTestedObject = new ToBeTested();
     $this->assertFalse($toBeTestedObject->simpleMethod(0));
   }
}

I know how to test, if the error is triggered ($this->setExpectedException()), but I don't know how to execute the code after trigger_error() function.

Remember that in PHPUnit E_USER_WARNING is not converted into PHPUnit_Framework_Error_Warning (which can be disabled), but it is converted into PHPUnit_Framework_Error (which can't be disabled).

Answer 1

This is one of the places where you are 'officially' allowed to use the @ operator :)

One Test to check the return value, one test to check if the warning gets triggered (since i'd say you should test if the warning ist triggered)

class SimpleTest extends PHPUnit_Framework_TestCase
{
   function testSimpleMethodReturnValue()
   {
     $toBeTestedObject = new ToBeTested();
     $this->assertFalse(@$toBeTestedObject->simpleMethod(0));
   }

   /**
    * @expectedExcpetion PHPUNIT_Framework_Error
    */
   function testSimpleMethodEmitsWarning() {
     $toBeTestedObject = new ToBeTested();
     $toBeTestedObject->simpleMethod(0);
   }
}