feat: close application architecture gaps

2026-08-23 11:45:57 +05:30
parent d87b197224
commit 2e12656060
20 changed files with 548 additions and 23 deletions
@@ -0,0 +1,42 @@
+import { expect, test } from "bun:test";
+import { defineEntitlements, defineMeter, definePacks } from "../src/index.ts";
+
+test("resolves fallback entitlements and features", async () => {
+  const entitlements = defineEntitlements({
+    plans: () => [
+      { code: "free", name: "Free", features: [], allowance: 10 },
+      { code: "pro", name: "Pro", features: ["schedule"], allowance: 100 },
+    ],
+    subscriptionFor: async () => "pro",
+    fallback: "free",
+  });
+  expect(await entitlements.enabled("u1", "schedule")).toBe(true);
+  expect(await entitlements.allowance("u1")).toBe(100);
+});
+
+test("packs are immutable and selected only by code", () => {
+  const packs = definePacks([{ code: "small", units: 100, label: "Small" }]);
+  expect(packs.get("constructor")).toBeUndefined();
+  expect(packs.get("small")?.units).toBe(100);
+});
+
+test("meter distinguishes refusals from storage faults", async () => {
+  const meter = defineMeter({
+    store: {
+      balance: async () => 5,
+      reserve: async (_subject, units) => units <= 5,
+      write: async () => {
+        throw new Error("offline");
+      },
+    },
+  });
+  expect(await meter.reserve("u1", 6, "send")).toEqual({
+    ok: false,
+    reason: "insufficient balance",
+  });
+  expect(await meter.grant("u1", 5, "plan")).toEqual({
+    ok: false,
+    reason: "offline",
+    fault: true,
+  });
+});