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oh-my-pi/packages/coding-agent/test/compaction-hooks-example.test.ts
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71 lines
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TypeScript

/**
* Verify the documentation example from hooks.md compiles and works.
*/
import { describe, expect, it } from "bun:test";
import type {
HookAPI,
SessionBeforeCompactEvent,
SessionCompactEvent,
} from "@oh-my-pi/pi-coding-agent/extensibility/hooks";
describe("Documentation example", () => {
it("custom compaction example should type-check correctly", () => {
// This is the example from hooks.md - verify it compiles
const exampleHook = (pi: HookAPI) => {
pi.on("session_before_compact", async (event: SessionBeforeCompactEvent, ctx) => {
// All these should be accessible on the event
const { preparation, branchEntries } = event;
// sessionManager, modelRegistry, and model come from ctx
const { sessionManager, modelRegistry } = ctx;
const { messagesToSummarize, turnPrefixMessages, tokensBefore, firstKeptEntryId, isSplitTurn } =
preparation;
// Verify types
expect(Array.isArray(messagesToSummarize)).toBe(true);
expect(Array.isArray(turnPrefixMessages)).toBe(true);
expect(typeof isSplitTurn).toBe("boolean");
expect(typeof tokensBefore).toBe("number");
expect(typeof sessionManager.getEntries).toBe("function");
expect(typeof modelRegistry.getApiKey).toBe("function");
expect(typeof firstKeptEntryId).toBe("string");
expect(Array.isArray(branchEntries)).toBe(true);
const summary = messagesToSummarize
.filter(m => m.role === "user")
.map(m => `- ${typeof m.content === "string" ? m.content.slice(0, 100) : "[complex]"}`)
.join("\n");
// Hooks return compaction content - SessionManager adds id/parentId
return {
compaction: {
summary: `User requests:\n${summary}`,
firstKeptEntryId,
tokensBefore,
},
};
});
};
// Just verify the function exists and is callable
expect(typeof exampleHook).toBe("function");
});
it("compact event should have correct fields", () => {
const checkCompactEvent = (pi: HookAPI) => {
pi.on("session_compact", async (event: SessionCompactEvent) => {
// These should all be accessible
const entry = event.compactionEntry;
const fromExtension = event.fromExtension;
expect(entry.type).toBe("compaction");
expect(typeof entry.summary).toBe("string");
expect(typeof entry.tokensBefore).toBe("number");
expect(typeof fromExtension).toBe("boolean");
});
};
expect(typeof checkCompactEvent).toBe("function");
});
});