/**
  * @test
  */
 public function providesSingularVersion()
 {
     $plugin = new ArbitraryVersionPlugin('arbitrage', function () {
     }, function () {
     }, function () {
     }, function () {
     }, function () {
     }, function () {
         return null;
     });
     $this->assertEquals(array('arbitrage'), $plugin->getProvidedVersions());
 }