 
 class ObserverTests: XCTestCase {
 
+    var observer: Observer<Event>!
     let configuration: TaylorSource.Configuration<Event> = events(true)
 }
 

        let connection = db.newConnection()
        let expectation = expectationWithDescription("Writing one object")

        let observer = Observer(
            database: db,
            changes: validateChangeset(expectation, validations: [validateChangesetHasSectionInsert()]),
            configuration: configuration)

        let connection = db.newConnection()
        let expectation = expectationWithDescription("Writing many object to groups")

        observer = Observer(
            database: db,
            changes: validateChangeset(expectation, validations: [validateChangesetHasSectionInsert(2)]),
            configuration: configuration)
