OutputTestCase.php

<?php

class OutputTestCase extends PHPUnit_Framework_TestCase {
  public function testExpectOutputStringFooActualFoo() {
    $this
      ->expectOutputString('foo');
    print 'foo';
  }
  public function testExpectOutputStringFooActualBar() {
    $this
      ->expectOutputString('foo');
    print 'bar';
  }
  public function testExpectOutputRegexFooActualFoo() {
    $this
      ->expectOutputRegex('/foo/');
    print 'foo';
  }
  public function testExpectOutputRegexFooActualBar() {
    $this
      ->expectOutputRegex('/foo/');
    print 'bar';
  }

}