/**
  * @covers ::check
  */
 public function testCanCallStatically()
 {
     // ----------------------------------------------------------------
     // setup your test
     $expectedResult = false;
     if (file_exists('/etc/redhat-release')) {
         $expectedResult = true;
     }
     // ----------------------------------------------------------------
     // perform the change
     $actualResult = HasEtcRedhatRelease::check();
     // ----------------------------------------------------------------
     // test the results
     $this->assertEquals($expectedResult, $actualResult);
 }
 /**
  * use /etc/redhat-release (if it exists) to work out what flavour of
  * RedHat Linux we are looking at
  *
  * @param  string $path
  *         path to the file to parse
  * @return null|OsType
  *         OsType if we can determine the operating system
  *         null if we cannot
  */
 public static function usingPath($path)
 {
     // make sure we have the file!
     if (!HasEtcRedhatRelease::check($path)) {
         return null;
     }
     // make sure the file is readable
     RequireReadableFile::check($path);
     // what do we have?
     $fileContents = file_get_contents($path);
     // do we have a match?
     return self::matchContentsToType($fileContents);
 }