feat: 기능 추가 과정중

tests/unit/navigation-policy.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  NAVIGATION_ROUTES,
+  ROUTE_REGISTRY,
+} from "../../src/features/installed-feature-contracts.ts";
+import {
+  createRedirectLoopGuard,
+  decideRouteAccess,
+} from "../../src/presentation/routes/navigation-policy.ts";
+
+describe("installed route registry", () => {
+  it("derives visible navigation in explicit order", () => {
+    const expected = Object.values(ROUTE_REGISTRY)
+      .filter((route) => route.navigationOrder !== null)
+      .sort(
+        (left, right) =>
+          left.navigationOrder! - right.navigationOrder!,
+      )
+      .map((route) => route.routeId);
+    expect(NAVIGATION_ROUTES.map(({ routeId }) => routeId)).toEqual(expected);
+  });
+
+  it("allows public routes without consulting a product permission", () => {
+    expect(decideRouteAccess("APP_HOME", "unauthenticated")).toEqual({
+      allowed: true,
+      action: "none",
+    });
+  });
+
+  it("bounds automatic redirects by pair and maximum hops", () => {
+    const guard = createRedirectLoopGuard(2);
+    expect(guard.allow("/private", "/signin")).toBe(true);
+    expect(guard.allow("/private", "/signin")).toBe(false);
+    expect(guard.allow("/signin", "/signin")).toBe(false);
+    expect(guard.allow("/signin", "/continue")).toBe(true);
+    expect(guard.allow("/continue", "/final")).toBe(false);
+    expect(guard.hopCount).toBe(2);
+  });
+});