entity slice enhancer test

Author: Olesj-Bilous

packages/toolkit/src/entities/tests/entity_slice_enhancer.test.ts

@@ -0,0 +1,36 @@
+import { createEntityAdapter, createSlice } from "../..";
+import type { PayloadAction, SliceCaseReducers } from "../..";
+import type { DraftableIdSelector, IdSelector } from "../models";
+
+interface EntitySliceArgs<T> {
+  name: string
+  modelReducer: SliceCaseReducers<T>
+  selectId: IdSelector<T> // unusable
+  selectDraftableId: DraftableIdSelector<T>
+}
+
+// currently this never runs, it only serves to illustrate that the containing calls are type valid
+function entitySliceEnhancer<T>({
+  name,
+  modelReducer,
+  selectId: undraftableSelectId,
+  selectDraftableId
+}: EntitySliceArgs<T>) {
+  const modelAdapter = createEntityAdapter<T>({
+    selectId: selectDraftableId // undraftableSelectId would give an interesting error
+  });
+
+  return createSlice({
+    name,
+    initialState: modelAdapter.getInitialState(),
+    reducers: {
+      oneAdded(state, action: PayloadAction<T>) {
+        modelAdapter.addOne(
+          state,
+          action.payload
+        )
+      },
+      ...modelReducer
+    }
+  })
+}