test(auth): add cookie schema test

cookie.ts was the only entity model in the feature packages without a
sibling test. Covers minimal/full attributes, invalid sameSite, and a
missing required field.

packages/auth/src/entities/models/cookie.test.ts

@@ -0,0 +1,47 @@
+import { describe, expect, it } from "vitest";
+import { cookieSchema } from "./cookie";
+
+describe("cookieSchema", () => {
+  it("accepts a minimal cookie with empty attributes", () => {
+    const result = cookieSchema.parse({
+      name: "session",
+      value: "abc123",
+      attributes: {},
+    });
+    expect(result.name).toBe("session");
+    expect(result.value).toBe("abc123");
+  });
+
+  it("accepts a fully-populated cookie", () => {
+    const result = cookieSchema.parse({
+      name: "session",
+      value: "abc123",
+      attributes: {
+        secure: true,
+        path: "/",
+        domain: "example.com",
+        sameSite: "strict",
+        httpOnly: true,
+        maxAge: 3600,
+        expires: new Date(),
+      },
+    });
+    expect(result.attributes.sameSite).toBe("strict");
+  });
+
+  it("rejects an invalid sameSite value", () => {
+    expect(() =>
+      cookieSchema.parse({
+        name: "session",
+        value: "abc123",
+        attributes: { sameSite: "invalid" },
+      }),
+    ).toThrow();
+  });
+
+  it("rejects a missing required field", () => {
+    expect(() =>
+      cookieSchema.parse({ name: "session", attributes: {} }),
+    ).toThrow();
+  });
+});