test: add tests for useCookies()

src/composables/__tests__/useCookies.test.ts

@@ -0,0 +1,78 @@
+import { describe, test, expect, beforeEach, afterEach } from "vitest";
+import { useCookies } from "../useCookies";
+
+interface SimulatedCookies {
+  [key: string]: string;
+}
+
+describe("useCookies", () => {
+  let simulatedCookies: SimulatedCookies = {};
+  const cookies = useCookies();
+
+  beforeEach(() => {
+    Object.defineProperty(document, "cookie", {
+      configurable: true,
+      get: () => {
+        return Object.entries(simulatedCookies)
+          .map(([cookieName, cookieValue]) => `${cookieName}=${cookieValue}`)
+          .join("; ");
+      },
+
+      set: (newValue) => {
+        const parts = newValue.split("; ");
+        const [cookieName, cookieValue] = parts[0].split("=");
+        simulatedCookies[cookieName] = cookieValue;
+
+        for (const part of parts.slice(1)) {
+          simulatedCookies[cookieName] += `; ${part}`;
+        }
+      },
+    });
+  });
+
+  afterEach(() => {
+    simulatedCookies = {};
+  });
+
+  test("setCookie correctly sets a cookie", () => {
+    const { setCookie } = useCookies();
+    setCookie("test", "value");
+    expect(document.cookie).toContain("test=value");
+  });
+
+  test("getCookie retrieves the value of an existing cookie", () => {
+    cookies.setCookie("test", "value");
+    const { getCookie } = useCookies();
+    expect(getCookie("test")).toBe("value");
+  });
+
+  test("getCookie returns null if the cookie does not exist", () => {
+    expect(document.cookie).toBe("");
+    const value = cookies.getCookie("nonExistingCookie");
+    expect(value).toBeNull();
+  });
+
+  test("deleteCookie removes a cookie", () => {
+    cookies.setCookie("test", "value");
+    const { deleteCookie } = useCookies();
+    deleteCookie("test");
+    expect(document.cookie).toContain("test=");
+  });
+
+  test("setCookie adds options correctly", () => {
+    const { setCookie } = useCookies();
+
+    const dateExpire = new Date();
+    dateExpire.setDate(dateExpire.getDate() + 7);
+
+    setCookie("testOption", "value", {
+      expires: dateExpire,
+      secure: true,
+      HttpOnly: true,
+    });
+
+    expect(document.cookie).toContain("testOption=value");
+    expect(document.cookie).toContain("secure");
+    expect(document.cookie).toContain("HttpOnly");
+  });
+});