ensure action before trying to match

Author: ben.durrant

packages/toolkit/src/dynamicMiddleware/index.ts

@@ -5,7 +5,7 @@ import type {
   MiddlewareAPI,
 } from 'redux'
 import { compose } from 'redux'
-import { createAction } from '../createAction'
+import { createAction, isAction } from '../createAction'
 import { nanoid } from '../nanoid'
 import { find } from '../utils'
 import type {
@@ -93,6 +93,7 @@ export const createDynamicMiddleware = <
   const middleware: DynamicMiddleware<State, Dispatch> =
     (api) => (next) => (action) => {
       if (
+        isAction(action) &&
         withMiddleware.match(action) &&
         action.meta.instanceId === instanceId
       ) {

packages/toolkit/src/dynamicMiddleware/tests/index.test.ts

@@ -2,6 +2,7 @@ import type { Middleware } from 'redux'
 import { createDynamicMiddleware } from '../index'
 import { configureStore } from '../../configureStore'
 import type { BaseActionCreator, PayloadAction } from '../../createAction'
+import { isAction } from '../../createAction'
 import { createAction } from '../../createAction'
 
 export interface ProbeMiddleware
@@ -22,7 +23,11 @@ export const makeProbeableMiddleware =
   (api) =>
   (next) =>
   (action) => {
-    if (probeMiddleware.match(action) && action.payload === id) {
+    if (
+      isAction(action) &&
+      probeMiddleware.match(action) &&
+      action.payload === id
+    ) {
       return id
     }
     return next(action)