public function testConsoleExecutesRunnerAndEchosOutput() { $runner = $this->getMock('Mutagenesis\\Runner\\Base', array('execute')); $runner->expects($this->once())->method('execute')->will($this->returnValue('mutation results')); ob_start(); \Mutagenesis\Console::main(null, $runner); $this->assertEquals(ob_get_clean(), 'mutation results'); }