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workbench/web/test/api.test.ts

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+import { afterEach, describe, it } from "node:test";
+import assert from "node:assert/strict";
+
+import {
+	getGraphData,
+	getGraphLayout,
+	putGraphLayout,
+	rebuildGraph,
+} from "../src/lib/api";
+
+describe("graph API helpers", () => {
+	const originalFetch = globalThis.fetch;
+
+	afterEach(() => {
+		globalThis.fetch = originalFetch;
+	});
+
+	it("binds graph reads, rebuilds, and layout writes to the requested knowledge base", async () => {
+		const requests: Array<{ url: string; method: string; body?: BodyInit | null }> = [];
+		const responses: unknown[] = [
+			{ ok: true, needsBuild: true, graphPath: "/kb/wiki/graph-data.json" },
+			{ ok: true, layoutPath: "/kb/.wiki-graph-layout.json", layout: { version: 1, pins: {}, updatedAt: "" } },
+			{ ok: true, status: "started" },
+			{ ok: true, layoutPath: "/kb/.wiki-graph-layout.json", layout: { version: 1, pins: {}, updatedAt: "" } },
+		];
+		globalThis.fetch = (async (input, init) => {
+			requests.push({
+				url: String(input),
+				method: init?.method ?? "GET",
+				body: init?.body,
+			});
+			return new Response(JSON.stringify(responses.shift()), {
+				headers: { "Content-Type": "application/json" },
+			});
+		}) as typeof fetch;
+
+		const kbPath = "/tmp/Knowledge Base";
+		await getGraphData(kbPath);
+		await getGraphLayout(kbPath);
+		await rebuildGraph(kbPath);
+		await putGraphLayout(kbPath, { "wiki/a.md": { x: 1, y: 2 } });
+
+		assert.deepEqual(
+			requests.map((request) => request.url),
+			[
+				"/api/graph?kb=%2Ftmp%2FKnowledge%20Base",
+				"/api/graph/layout?kb=%2Ftmp%2FKnowledge%20Base",
+				"/api/graph/rebuild?kb=%2Ftmp%2FKnowledge%20Base",
+				"/api/graph/layout?kb=%2Ftmp%2FKnowledge%20Base",
+			],
+		);
+		assert.deepEqual(
+			requests.map((request) => request.method),
+			["GET", "GET", "POST", "PUT"],
+		);
+		assert.deepEqual(JSON.parse(String(requests[3]?.body)), {
+			version: 2,
+			pins: { "wiki/a.md": { x: 1, y: 2 } },
+		});
+	});
+});