Add storage proxy test

lib/core/regs/storage.test.js

@@ -0,0 +1,52 @@
+import { LocalStorageProxy } from "./storage";
+
+describe("LocalStorageProxy", () => {
+  let windowSpy;
+
+  let localStorageMock = {
+    getItem: jest.fn(),
+    setItem: jest.fn(),
+    removeItem: jest.fn(),
+  };
+
+  beforeEach(() => {
+    windowSpy = jest.spyOn(window, "window", "get");
+    windowSpy.mockImplementation(() => ({
+      localStorage: localStorageMock,
+    }));
+  });
+
+  afterEach(() => {
+    localStorageMock.getItem.mockClear();
+    localStorageMock.setItem.mockClear();
+    localStorageMock.removeItem.mockClear();
+    windowSpy.mockRestore();
+  });
+
+  it("proxies to underlying storage when consent granted", () => {
+    const storage = new LocalStorageProxy({ deviceAccess: true });
+
+    storage.getItem("key");
+    expect(localStorageMock.getItem).toHaveBeenCalledWith("key");
+
+    storage.setItem("key", "value");
+    expect(localStorageMock.setItem).toHaveBeenCalledWith("key", "value");
+
+    storage.removeItem("key");
+    expect(localStorageMock.removeItem).toHaveBeenCalledWith("key");
+  });
+
+  it("doesn't access underlying storage when consent not granted", () => {
+    const storage = new LocalStorageProxy({ deviceAccess: false });
+
+    const result = storage.getItem("key");
+    expect(localStorageMock.getItem).not.toHaveBeenCalled();
+    expect(result).toBeNull();
+
+    storage.setItem("key", "value");
+    expect(localStorageMock.setItem).not.toHaveBeenCalled();
+
+    storage.removeItem("key");
+    expect(localStorageMock.removeItem).not.toHaveBeenCalled();
+  });
+});