Tests on detail reducer => DONE

client/src/app/instance/store/reducers/detail.reducer.ts

@@ -11,6 +11,11 @@ import { createReducer, on } from '@ngrx/store';
 
 import * as detailActions from '../actions/detail.actions';
 
+/**
+ * Interface for detail state.
+ *
+ * @interface State
+ */
 export interface State {
     object: any;
     objectIsLoading: boolean;