public static function suite() {
$suite = new PHPUnit_Framework_TestSuite();
$suite
->addTest(new Framework_SuiteTest('testAddTestSuite'));
$suite
->addTest(new Framework_SuiteTest('testInheritedTests'));
$suite
->addTest(new Framework_SuiteTest('testNoTestCases'));
$suite
->addTest(new Framework_SuiteTest('testNoTestCaseClass'));
$suite
->addTest(new Framework_SuiteTest('testNotExistingTestCase'));
$suite
->addTest(new Framework_SuiteTest('testNotPublicTestCase'));
$suite
->addTest(new Framework_SuiteTest('testNotVoidTestCase'));
$suite
->addTest(new Framework_SuiteTest('testOneTestCase'));
$suite
->addTest(new Framework_SuiteTest('testShadowedTests'));
return $suite;
}