<?php

require_once 'Swift/Tests/SwiftUnitTestCase.php';
require_once 'Swift/Transport/StreamBuffer.php';
require_once 'Swift/ReplacementFilterFactory.php';
require_once 'Swift/StreamFilter.php';

class Swift_Transport_StreamBufferTest extends Swift_Tests_SwiftUnitTestCase
{
  
  public function testSettingWriteTranslationsCreatesFilters()
  {
    $factory = $this->_createFactory();
    $this->_checking(Expectations::create()
      -> one($factory)->createFilter('a', 'b') -> returns($this->_createFilter())
      -> never($factory)
      );
    $buffer = $this->_createBuffer($factory);
    $buffer->setWriteTranslations(array('a' => 'b'));
  }
  
  public function testOverridingTranslationsOnlyAddsNeededFilters()
  {
    $factory = $this->_createFactory();
    $this->_checking(Expectations::create()
      -> one($factory)->createFilter('a', 'b') -> returns($this->_createFilter())
      -> one($factory)->createFilter('x', 'y') -> returns($this->_createFilter())
      -> never($factory)
      );
    $buffer = $this->_createBuffer($factory);
    $buffer->setWriteTranslations(array('a' => 'b'));
    $buffer->setWriteTranslations(array('x' => 'y', 'a' => 'b'));
  }
  
  // -- Creation methods
  
  private function _createBuffer($replacementFactory)
  {
    return new Swift_Transport_StreamBuffer($replacementFactory);
  }
  
  private function _createFactory()
  {
    return $this->_mock('Swift_ReplacementFilterFactory');
  }
  
  private function _createFilter()
  {
    return $this->_stub('Swift_StreamFilter');
  }
  
}