pull over test cases from #4056

Author: EskiMojo14

packages/toolkit/src/tests/createSlice.test.ts

@@ -533,12 +533,21 @@ describe('createSlice', () => {
       expect(injectedSlice.selectSlice(uninjectedState)).toBe(
         slice.getInitialState()
       )
+      expect(injectedSlice.selectors.selectMultiple({}, 1)).toBe(
+        slice.getInitialState()
+      )
+      expect(injectedSlice.getSelectors().selectMultiple(undefined, 1)).toBe(
+        slice.getInitialState()
+      )
 
       const injectedState = combinedReducer(undefined, increment())
 
       expect(injectedSlice.selectSlice(injectedState)).toBe(
         slice.getInitialState() + 1
       )
+      expect(injectedSlice.selectors.selectMultiple(injectedState, 1)).toBe(
+        slice.getInitialState() + 1
+      )
     })
     it('allows providing a custom name to inject under', () => {
       const slice = createSlice({