huskies: merge 949

frontend/src/api/rpcContract.test.ts

@@ -0,0 +1,29 @@
+/**
+ * Snapshot test: the frontend `CONTRACT_FIXTURES` table must match the
+ * Rust-side snapshot.  When the Rust contract changes, the snapshot file
+ * regenerates (via `UPDATE_RPC_CONTRACT_SNAPSHOT=1 cargo test`) and this
+ * test catches any TS shapes that have drifted.
+ */
+import { describe, expect, it } from "vitest";
+import { CONTRACT_FIXTURES } from "./rpcContract";
+import snapshot from "./rpcContract.snapshot.json";
+
+describe("rpcContract", () => {
+	it("CONTRACT_FIXTURES matches the Rust-generated snapshot", () => {
+		// Convert TS fixtures into the same shape the Rust snapshot serialises
+		// to: a method-keyed object of `{ params, result }`.
+		const fromTs = Object.fromEntries(
+			Object.entries(CONTRACT_FIXTURES).map(([method, payloads]) => [
+				method,
+				{ params: payloads.params, result: payloads.result },
+			]),
+		);
+		expect(fromTs).toEqual(snapshot);
+	});
+
+	it("declares the same method names as the snapshot", () => {
+		const tsMethods = Object.keys(CONTRACT_FIXTURES).sort();
+		const rustMethods = Object.keys(snapshot).sort();
+		expect(tsMethods).toEqual(rustMethods);
+	});
+});