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test(local-storage): extract shared global mock

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This commit is contained in:
Eric Liu 2025-04-12 13:33:30 -07:00
commit c540fa8b68
3 changed files with 50 additions and 63 deletions
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36
tests/LocalStorage/LocalStorage.test.ts
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@ -1,35 +1,9 @@
import { render } from "@testing-library/svelte";
import { setupLocalStorageMock } from "../setup-tests";
import LocalStorage from "./LocalStorage.test.svelte";
describe("LocalStorage", () => {
let localStorageMock: { [key: string]: string };
let originalLocalStorage: Storage;
beforeEach(() => {
originalLocalStorage = global.localStorage;
localStorageMock = {};
global.localStorage = {
getItem: vi.fn((key) => localStorageMock[key] || null),
setItem: vi.fn((key, value) => {
localStorageMock[key] = value;
}),
removeItem: vi.fn((key) => {
delete localStorageMock[key];
}),
clear: vi.fn(() => {
localStorageMock = {};
}),
length: 0,
key: vi.fn(),
};
});
afterEach(() => {
global.localStorage = originalLocalStorage;
localStorage.clear();
vi.restoreAllMocks();
localStorageMock = {};
});
const { setMockItem } = setupLocalStorageMock();
it("saves primitive value to localStorage on mount", () => {
render(LocalStorage);
@ -50,7 +24,7 @@ describe("LocalStorage", () => {
});
it("loads existing primitive value from localStorage", () => {
localStorageMock["local-storage-key"] = "existing-value";
setMockItem("local-storage-key", "existing-value");
render(LocalStorage);
expect(localStorage.getItem).toHaveBeenCalledWith("local-storage-key");
@ -59,7 +33,7 @@ describe("LocalStorage", () => {
it("loads existing object value from localStorage", () => {
// Set up existing value
const existingSettings = { theme: "light", fontSize: 14 };
localStorageMock["theme-settings"] = JSON.stringify(existingSettings);
setMockItem("theme-settings", JSON.stringify(existingSettings));
render(LocalStorage);
expect(localStorage.getItem).toHaveBeenCalledWith("theme-settings");
@ -87,7 +61,7 @@ describe("LocalStorage", () => {
it("handles JSON parse errors gracefully", () => {
// Set up invalid JSON
localStorageMock["local-storage-key"] = "{invalid-json}";
setMockItem("local-storage-key", "{invalid-json}");
render(LocalStorage);
expect(localStorage.getItem).toHaveBeenCalledWith("local-storage-key");