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