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import { describe, it, expect, beforeEach, vi } from "vitest";
import { cacheInstance } from "./cache";
describe("Cache", () => {
beforeEach(async () => {
// 每个测试前清空缓存
await cacheInstance.clear();
});
describe("基本操作", () => {
it("应该能够设置和获取不同类型的值", async () => {
await cacheInstance.set("string", "hello");
expect(await cacheInstance.get("string")).toBe("hello");
await cacheInstance.set("number", 42);
expect(await cacheInstance.get("number")).toBe(42);
const obj = { name: "test", count: 1 };
await cacheInstance.set("object", obj);
expect(await cacheInstance.get("object")).toEqual(obj);
expect(await cacheInstance.get("non-existent")).toBeUndefined();
});
it("应该能够批量设置值", async () => {
await cacheInstance.batchSet({
key1: "value1",
key2: "value2",
key3: "value3",
});
expect(await cacheInstance.get("key1")).toBe("value1");
expect(await cacheInstance.get("key2")).toBe("value2");
expect(await cacheInstance.get("key3")).toBe("value3");
});
});
describe("has/del/clear/list 方法", () => {
it("应该正确检查键是否存在", async () => {
await cacheInstance.set("existing-key", "value");
expect(await cacheInstance.has("existing-key")).toBe(true);
expect(await cacheInstance.has("non-existing-key")).toBe(false);
await cacheInstance.set("undefined-key", undefined);
expect(await cacheInstance.has("undefined-key")).toBe(false);
});
it("应该能够删除键和清空缓存", async () => {
await cacheInstance.batchSet({ key1: "v1", key2: "v2" });
await cacheInstance.del("key1");
expect(await cacheInstance.has("key1")).toBe(false);
expect(await cacheInstance.has("key2")).toBe(true);
await cacheInstance.clear();
expect(await cacheInstance.has("key2")).toBe(false);
});
it("应该能够批量删除键", async () => {
await cacheInstance.batchSet({ key1: "v1", key2: "v2", key3: "v3", key4: "v4" });
await (cacheInstance as any).dels(["key1", "key2", "key3"]);
expect(await cacheInstance.has("key1")).toBe(false);
expect(await cacheInstance.has("key2")).toBe(false);
expect(await cacheInstance.has("key3")).toBe(false);
expect(await cacheInstance.has("key4")).toBe(true);
});
it("应该返回所有键的列表", async () => {
await cacheInstance.batchSet({ key1: "v1", key2: "v2", key3: "v3" });
const keys = await cacheInstance.list();
expect(keys).toContain("key1");
expect(keys).toContain("key2");
expect(keys).toContain("key3");
});
});
describe("getOrSet 方法", () => {
it("应该懒加载和缓存值", async () => {
const setFn = vi.fn(() => "computed-value");
const value1 = await cacheInstance.getOrSet("new-key", setFn);
expect(setFn).toHaveBeenCalledTimes(1);
expect(value1).toBe("computed-value");
const setFn2 = vi.fn(() => "new-value");
const value2 = await cacheInstance.getOrSet("new-key", setFn2);
expect(setFn2).not.toHaveBeenCalled();
expect(value2).toBe("computed-value");
});
});
describe("tx 方法（事务）", () => {
it("应该能够读取、修改和删除值", async () => {
// 设置值
await cacheInstance.tx("tx-key", (val, tx) => {
tx.set("new-value");
});
expect(await cacheInstance.get("tx-key")).toBe("new-value");
// 基于现有值修改
await cacheInstance.tx("tx-key", (val: string | undefined, tx) => {
tx.set((val || "") + "-updated");
});
expect(await cacheInstance.get("tx-key")).toBe("new-value-updated");
// 删除值
await cacheInstance.tx("tx-key", (val, tx) => {
tx.del();
});
expect(await cacheInstance.has("tx-key")).toBe(false);
});
});
describe("incr 方法", () => {
it("应该能够增加和减少数值", async () => {
expect(await cacheInstance.incr("counter", 5)).toBe(5);
expect(await cacheInstance.incr("counter", 3)).toBe(8);
expect(await cacheInstance.incr("counter", -2)).toBe(6);
expect(await cacheInstance.get("counter")).toBe(6);
});
});
describe("并发操作", () => {
it("同一个键的事务应该串行化执行", async () => {
await cacheInstance.set("tx-counter", 0);
const executionOrder: number[] = [];
const promises = [
cacheInstance.tx("tx-counter", async (val: number | undefined, tx) => {
executionOrder.push(1);
await new Promise((resolve) => setTimeout(resolve, 30));
tx.set((val || 0) + 1);
return 1;
}),
cacheInstance.tx("tx-counter", async (val: number | undefined, tx) => {
executionOrder.push(2);
await new Promise((resolve) => setTimeout(resolve, 20));
tx.set((val || 0) + 1);
return 2;
}),
cacheInstance.tx("tx-counter", async (val: number | undefined, tx) => {
executionOrder.push(3);
await new Promise((resolve) => setTimeout(resolve, 10));
tx.set((val || 0) + 1);
return 3;
}),
];
const results = await Promise.all(promises);
// 验证事务按顺序执行，每个事务都返回正确的递增值
expect(executionOrder).toEqual([1, 2, 3]);
expect(results).toEqual([1, 2, 3]);
expect(await cacheInstance.get("tx-counter")).toBe(3);
});
it("不同键的事务可以并发执行", async () => {
const startTime = Date.now();
await Promise.all([
cacheInstance.tx("key-a", async (val, tx) => {
await new Promise((resolve) => setTimeout(resolve, 50));
tx.set("value-a");
}),
cacheInstance.tx("key-b", async (val, tx) => {
await new Promise((resolve) => setTimeout(resolve, 50));
tx.set("value-b");
}),
cacheInstance.tx("key-c", async (val, tx) => {
await new Promise((resolve) => setTimeout(resolve, 50));
tx.set("value-c");
}),
]);
const duration = Date.now() - startTime;
// 如果并发执行，总时间应该接近单个操作的时间（约50ms）
// 如果串行执行，总时间会接近 150ms
expect(duration).toBeLessThan(100);
});
it("并发 incr 操作应该正确累加", async () => {
await cacheInstance.set("incr-concurrent", 0);
const promises = Array.from({ length: 10 }, () => cacheInstance.incr("incr-concurrent", 1));
const results = await Promise.all(promises);
// 每个操作都应该返回唯一的递增值
const sortedResults = [...results].sort((a, b) => a - b);
expect(sortedResults).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
expect(await cacheInstance.get("incr-concurrent")).toBe(10);
});
});
describe("边界情况", () => {
it("应该能够处理特殊值", async () => {
await cacheInstance.set("empty-value", "");
expect(await cacheInstance.get("empty-value")).toBe("");
await cacheInstance.set("null-value", null);
expect(await cacheInstance.get("null-value")).toBe(null);
await cacheInstance.set("overwrite", "original");
await cacheInstance.set("overwrite", "updated");
expect(await cacheInstance.get("overwrite")).toBe("updated");
});
});
});