test: bindActionCreators

src/createContext.ts

@@ -17,7 +17,6 @@ export function createContextWithValue<S, T extends string, P>(
     return React.createContext<ContextValue<S, T, P>>({
         dispatch: (a) => a,
         getState: () => value.state,
-        reducer: (s) => s,
         ...value,
     } as ContextValue<S, T, P>);
 }

tests/utils.test.ts

@@ -0,0 +1,47 @@
+import { bindActionCreators } from "src/utils/bindActionCreators";
+
+describe("bindActionCreators", () => {
+    it("binds action creator function to dispatch", () => {
+        const dispatch = jest.fn();
+        const action = { type: "ACTION_TYPE", payload: "Some payload" };
+        const boundActionCreator = bindActionCreators(() => action, dispatch);
+        expect(boundActionCreator()).toBeUndefined();
+        expect(dispatch).toHaveBeenCalledTimes(1);
+        expect(dispatch).toHaveBeenCalledWith(action);
+    });
+
+    it("binds action creator mapping to dispatch", () => {
+        const dispatch = jest.fn();
+        const action = { type: "ACTION_TYPE", payload: "Some payload" };
+        const boundActionCreators = bindActionCreators(
+            ({
+                action1: () => action,
+                action2: null,
+                action3: undefined,
+                action4: "non function",
+            } as unknown) as ActionCreatorMapping,
+            dispatch,
+        );
+        expect(boundActionCreators.action1()).toBeUndefined();
+        expect(dispatch).toHaveBeenCalledTimes(1);
+        expect(dispatch).toHaveBeenCalledWith(action);
+        expect(boundActionCreators.action2).toBeUndefined();
+        expect(boundActionCreators.action3).toBeUndefined();
+        expect(boundActionCreators.action4).toBeUndefined();
+    });
+
+    it.each`
+        actionCreator
+        ${"non function"}
+        ${null}
+        ${undefined}
+    `(
+        "does not binds unsupported action creator to dispatch",
+        ({ actionCreator }) => {
+            const dispatch = jest.fn();
+            expect(() => bindActionCreators(actionCreator, dispatch)).toThrow(
+                "bindActionCreators expected an object or a function",
+            );
+        },
+    );
+});