describe("google prompt cache", () => {

it("creates cached content from the system prompt and strips that prompt from live requests", async () => {

const now = 1_000_000;

const expireTime = new Date(now + 3_600_000).toISOString();

const systemPromptDigest = crypto.createHash("sha256").update("Follow policy.").digest("hex");

const entries: SessionCustomEntry[] = [];

const sessionManager = makeSessionManager(entries);

const fetchMock = createCacheFetchMock({

name: "cachedContents/system-cache-1",

expireTime: new Date(now + 3_600_000).toISOString(),

expireTime,

});

const { streamFn: innerStreamFn, getCapturedPayload } = createCapturingStreamFn();

expect(Array.isArray(streamContext(innerStreamFn).tools)).toBe(true);

expect(streamOptions(innerStreamFn).temperature).toBe(0.2);

expect(getCapturedPayload()?.cachedContent).toBe("cachedContents/system-cache-1");

expect(entries).toHaveLength(1);

expect(entries[0]?.customType).toBe("openclaw.google-prompt-cache");

expect((entries[0]?.data as { status?: string; cachedContent?: string })?.status).toBe("ready");

expect(entries).toEqual([

{

type: "custom",

id: "entry-1",

parentId: null,

timestamp: new Date(1_000).toISOString(),

customType: "openclaw.google-prompt-cache",

data: {

status: "ready",

timestamp: now,

provider: "google",

modelId: "gemini-3.1-pro-preview",

modelApi: "google-generative-ai",

baseUrl: "https://generativelanguage.googleapis.com/v1beta",

systemPromptDigest,

cacheRetention: "long",

cachedContent: "cachedContents/system-cache-1",

expireTime,

},

},

]);

});

it("reuses a persisted cache entry without creating a second cache", async () => {