2229309a1e
add complete parent-bff implementation including: - GraphQL endpoint with depth/cost validation - ChildGuard越权校验 with redis cache and singleflight - parallel orchestration with partial failure fallback - three-level cache fallback strategy (Redis + LRU + downstream) - Kafka consumer for cache invalidation and notification push - opossum circuit breaker for downstream services - Prometheus metrics and SLO alerts - Helm chart for k8s deployment with multi-environment configs - Grafana dashboard for observability - complete unit and integration tests
100 lines
2.5 KiB
TypeScript
100 lines
2.5 KiB
TypeScript
import { describe, it, expect, beforeEach } from "vitest";
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import { LruCache } from "../../src/shared/cache/lru.cache.js";
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describe("LruCache", () => {
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let cache: LruCache;
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beforeEach(() => {
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cache = new LruCache(3);
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});
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describe("set / get", () => {
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it("应该存取值", () => {
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cache.set("key1", "value1", 60);
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expect(cache.get("key1")).toBe("value1");
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});
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it("未设置的 key 返回 null", () => {
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expect(cache.get("nonexistent")).toBeNull();
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});
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});
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describe("TTL 过期", () => {
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it("过期后返回 null", async () => {
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cache.set("key1", "value1", 0.01);
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await new Promise((resolve) => setTimeout(resolve, 20));
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expect(cache.get("key1")).toBeNull();
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});
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it("未过期时返回值", () => {
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cache.set("key1", "value1", 60);
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expect(cache.get("key1")).toBe("value1");
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});
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});
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describe("LRU 淘汰", () => {
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it("容量满时淘汰最久未使用的条目", () => {
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cache.set("a", "1", 60);
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cache.set("b", "2", 60);
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cache.set("c", "3", 60);
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cache.set("d", "4", 60);
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expect(cache.get("a")).toBeNull();
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expect(cache.get("b")).toBe("2");
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expect(cache.get("c")).toBe("3");
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expect(cache.get("d")).toBe("4");
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});
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it("访问后更新 LRU 顺序", () => {
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cache.set("a", "1", 60);
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cache.set("b", "2", 60);
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cache.set("c", "3", 60);
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cache.get("a");
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cache.set("d", "4", 60);
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expect(cache.get("a")).toBe("1");
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expect(cache.get("b")).toBeNull();
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});
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});
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describe("delete", () => {
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it("删除后返回 null", () => {
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cache.set("key1", "value1", 60);
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cache.delete("key1");
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expect(cache.get("key1")).toBeNull();
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});
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});
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describe("clear", () => {
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it("清空所有条目", () => {
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cache.set("a", "1", 60);
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cache.set("b", "2", 60);
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cache.clear();
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expect(cache.size).toBe(0);
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});
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});
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describe("size", () => {
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it("返回当前条目数", () => {
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expect(cache.size).toBe(0);
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cache.set("a", "1", 60);
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expect(cache.size).toBe(1);
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cache.set("b", "2", 60);
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expect(cache.size).toBe(2);
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});
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});
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it("默认 maxSize 为 100", () => {
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const defaultCache = new LruCache();
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for (let i = 0; i < 100; i++) {
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defaultCache.set(`key${i}`, `val${i}`, 60);
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}
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expect(defaultCache.size).toBe(100);
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defaultCache.set("key100", "val100", 60);
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expect(defaultCache.size).toBe(100);
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expect(defaultCache.get("key0")).toBeNull();
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});
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});
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