function testMakeEnvString()
 {
     $tester = new FunctionalTester();
     $this->specify('When set REQUEST_METHOD=GET, CONTENT_LENGTH=100', function () use($tester) {
         $tester->setEnv(['REQUEST_METHOD' => 'GET', 'CONTENT_LENGTH' => 100]);
         $this->assertEquals($tester->makeEnvString(), "REQUEST_METHOD='GET' CONTENT_LENGTH='100'");
     });
 }