public function testQueryingNonProvidedCapabilityReturnsNullSafely()
 {
     $capabilityApi = 'Composer\\Plugin\\Capability\\MadeUpCapability';
     $plugin = $this->getMockBuilder('Composer\\Test\\Plugin\\Mock\\CapablePluginInterface')->getMock();
     $plugin->expects($this->once())->method('getCapabilities')->will($this->returnCallback(function () {
         return array();
     }));
     $this->assertNull($this->pm->getPluginCapability($plugin, $capabilityApi));
 }