fix reservationsMinDaysBefore initialization when reservationsMaxDays…

…Before is set (#376)

admin-ui/src/component/ReservationUnits/ReservationUnitEditor/reducer.test.ts

@@ -0,0 +1,28 @@
+import { reducer } from "./reducer";
+import { State } from "./types";
+
+test("minDaysBefore is zeroed if it does not exist", () => {
+  const state = {
+    reservationUnitEdit: {},
+  } as unknown as State;
+
+  expect(
+    reducer(state, {
+      type: "setReservationsMaxDaysBefore",
+      reservationsMaxDaysBefore: 10,
+    }).reservationUnitEdit.reservationsMinDaysBefore
+  ).toEqual(0);
+});
+
+test("minDaysBefore is capped if it exists", () => {
+  const state = {
+    reservationUnitEdit: { reservationsMinDaysBefore: 20 },
+  } as unknown as State;
+
+  expect(
+    reducer(state, {
+      type: "setReservationsMaxDaysBefore",
+      reservationsMaxDaysBefore: 10,
+    }).reservationUnitEdit.reservationsMinDaysBefore
+  ).toEqual(10);
+});

admin-ui/src/component/ReservationUnits/ReservationUnitEditor/reducer.ts

@@ -371,7 +371,7 @@ export const reducer = (state: State, action: Action): State => {
               action.reservationsMaxDaysBefore,
               state.reservationUnitEdit.reservationsMinDaysBefore
             )
-          : undefined,
+          : 0,
       });
     }
     case "setSpaces": {