agentlily-runtime/tests/memory/capacity-limit.test.ts at main · ghzhost/agentlily-runtime · GitHub

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import { describe, it, expect } from "vitest";
import { InMemoryMemoryStore } from "../../src/memory/memory-store.js";

describe("InMemoryMemoryStore capacity limit", () => {
  it("uses default maxEntries of 10000", () => {
    const store = new InMemoryMemoryStore();
    expect(store.capacity).toBe(10_000);
  });

  it("accepts custom maxEntries via constructor", () => {
    const store = new InMemoryMemoryStore({ maxEntries: 50 });
    expect(store.capacity).toBe(50);
  });

  it("evicts oldest entries when capacity is exceeded (FIFO)", async () => {
    const store = new InMemoryMemoryStore({ maxEntries: 3 });

    await store.append({
      agentId: "a1",
      taskId: "t1",
      input: "first",
      output: null,
      recordedAt: "2026-01-01T00:00:00Z"
    });
    await store.append({
      agentId: "a1",
      taskId: "t2",
      input: "second",
      output: null,
      recordedAt: "2026-01-01T00:00:01Z"
    });
    await store.append({
      agentId: "a1",
      taskId: "t3",
      input: "third",
      output: null,
      recordedAt: "2026-01-01T00:00:02Z"
    });
    await store.append({
      agentId: "a1",
      taskId: "t4",
      input: "fourth",
      output: null,
      recordedAt: "2026-01-01T00:00:03Z"
    });

    expect(store.size).toBe(3);

    const entries = await store.listByAgent("a1");
    expect(entries.map((e) => e.taskId)).toEqual(["t2", "t3", "t4"]);
  });

  it("does not evict when under capacity", async () => {
    const store = new InMemoryMemoryStore({ maxEntries: 100 });

    for (let i = 0; i < 50; i++) {
      await store.append({
        agentId: "a1",
        taskId: `t${i}`,
        input: `input-${i}`,
        output: null,
        recordedAt: new Date().toISOString()
      });
    }

    expect(store.size).toBe(50);
  });

  it("size returns current entry count", async () => {
    const store = new InMemoryMemoryStore({ maxEntries: 100 });
    expect(store.size).toBe(0);

    await store.append({
      agentId: "a1",
      taskId: "t1",
      input: "x",
      output: null,
      recordedAt: new Date().toISOString()
    });
    expect(store.size).toBe(1);

    await store.append({
      agentId: "a1",
      taskId: "t2",
      input: "y",
      output: null,
      recordedAt: new Date().toISOString()
    });
    expect(store.size).toBe(2);
  });

  it("listByAgent works correctly after eviction", async () => {
    const store = new InMemoryMemoryStore({ maxEntries: 4 });

    await store.append({
      agentId: "a1",
      taskId: "t1",
      input: "old-a1",
      output: null,
      recordedAt: "2026-01-01T00:00:00Z"
    });
    await store.append({
      agentId: "a2",
      taskId: "t2",
      input: "old-a2",
      output: null,
      recordedAt: "2026-01-01T00:00:01Z"
    });
    await store.append({
      agentId: "a1",
      taskId: "t3",
      input: "mid-a1",
      output: null,
      recordedAt: "2026-01-01T00:00:02Z"
    });
    await store.append({
      agentId: "a2",
      taskId: "t4",
      input: "mid-a2",
      output: null,
      recordedAt: "2026-01-01T00:00:03Z"
    });
    // This evicts t1 (oldest)
    await store.append({
      agentId: "a1",
      taskId: "t5",
      input: "new-a1",
      output: null,
      recordedAt: "2026-01-01T00:00:04Z"
    });

    const a1Entries = await store.listByAgent("a1");
    expect(a1Entries.map((e) => e.taskId)).toEqual(["t3", "t5"]);

    const a2Entries = await store.listByAgent("a2");
    expect(a2Entries.map((e) => e.taskId)).toEqual(["t2", "t4"]);
  });
});