};

}

function requireCompactionProvider(id: string): CompactionProvider {

const provider = getCompactionProvider(id);

if (!provider) {

throw new Error(`Expected compaction provider ${id}`);

}

return provider;

}

describe("compaction provider registry", () => {

it("starts empty", () => {

expect(listCompactionProviderIds()).toEqual([]);

it("calls summarize and returns expected result", async () => {

registerCompactionProvider(makeProvider("my-compactor"));

const provider = getCompactionProvider("my-compactor");

const result = await provider!.summarize({ messages: [] });

const provider = requireCompactionProvider("my-compactor");

const result = await provider.summarize({ messages: [] });

expect(result).toBe("summary-from-my-compactor");

});