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Diffstat (limited to '')
-rw-r--r-- | src/features/counter/counterSlice.spec.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/features/counter/counterSlice.spec.js b/src/features/counter/counterSlice.spec.js new file mode 100644 index 0000000..113526b --- /dev/null +++ b/src/features/counter/counterSlice.spec.js @@ -0,0 +1,33 @@ +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); + }); +}); |