43 lines
1.6 KiB
TypeScript
43 lines
1.6 KiB
TypeScript
import myLocalStorage, { LocalStorage } from "utils/localStorage";
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describe("local storage", () => {
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afterEach(() => {
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jest.clearAllMocks();
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});
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it("calls getItem", () => {
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jest.spyOn(window.localStorage.__proto__, "getItem");
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window.localStorage.__proto__.getItem = jest.fn();
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myLocalStorage.getItem("myTestKey");
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expect(localStorage.getItem).toBeCalledWith("myTestKey");
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});
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it("calls setItem", () => {
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jest.spyOn(window.localStorage.__proto__, "setItem");
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window.localStorage.__proto__.setItem = jest.fn();
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myLocalStorage.setItem("myTestKey", "testValue");
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expect(localStorage.setItem).toBeCalledWith("myTestKey", "testValue");
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});
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it("calls removeItem", () => {
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jest.spyOn(window.localStorage.__proto__, "removeItem");
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window.localStorage.__proto__.removeItem = jest.fn();
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myLocalStorage.removeItem("myTestKey");
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expect(localStorage.removeItem).toBeCalledWith("myTestKey");
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});
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it("calls clear", () => {
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jest.spyOn(window.localStorage.__proto__, "clear");
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window.localStorage.__proto__.clear = jest.fn();
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myLocalStorage.clear();
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expect(localStorage.clear).toBeCalled();
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});
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it("shouldn't call getItem if localStorage is not supported", () => {
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window.localStorage.__proto__.setItem = jest.fn(() => {
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// this makes sure isSupported is set as false within the util
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throw new Error();
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});
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jest.spyOn(window.localStorage.__proto__, "getItem");
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const localStorageInstance = new LocalStorage();
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localStorageInstance.getItem("myTestKey");
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expect(localStorage.getItem).toHaveBeenCalledTimes(0);
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});
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});
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