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import counterReducer, {
increment,
decrement,
incrementByAmount,
} from "./counterSlice";
describe("counter reducer", () => {
const initialState = {
value: 3,
status: "idle",
};
it("should handle initial state", () => {
expect(counterReducer(undefined, { type: "unknown" })).toEqual({
value: 0,
status: "idle",
});
});
it("should handle increment", () => {
const actual = counterReducer(initialState, increment());
expect(actual.value).toEqual(4);
});
it("should handle decrement", () => {
const actual = counterReducer(initialState, decrement());
expect(actual.value).toEqual(2);
});
it("should handle incrementByAmount", () => {
const actual = counterReducer(initialState, incrementByAmount(2));
expect(actual.value).toEqual(5);
});
});
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