import { reducer , initialState } from './seatmap.reducer' ; describe ( 'Seatmap Reducer' , ( ) => { describe ( 'an unknown action' , ( ) => { it ( 'should return the previous state' , ( ) => { const action = { } as any ; const result = reducer ( initialState , action ) ; expect ( result ) . toBe ( initialState ) ; } ) ; } ) ; } ) ;