/**
  * @covers WindowsAzure\ServiceRuntime\RoleEnvironment::addRoleEnvironmentStoppingListener
  * @covers WindowsAzure\ServiceRuntime\RoleEnvironment::removeRoleEnvironmentStoppingListener
  */
 public function testAddRemoveRoleEnvironmentStoppingListener()
 {
     RoleEnvironment::addRoleEnvironmentStoppingListener('RoleEnvironmentTest::myFunction');
     // Removing succeeds
     $this->assertEquals(true, RoleEnvironment::removeRoleEnvironmentStoppingListener('RoleEnvironmentTest::myFunction'));
     // Removing again fails
     $this->assertEquals(false, RoleEnvironment::removeRoleEnvironmentStoppingListener('RoleEnvironmentTest::myFunction'));
 }