feat: group all-account rows by instrument and day (WealthLedger/main#47) (#126)

src/entities/brokerage-event/model/event-key.test.ts

@@ -0,0 +1,57 @@
+import { describe, expect, it } from "vitest";
+
+import type { BrokerageEvent } from "../api/useBrokerageEvents";
+
+import { brokerageEventGroupKey } from "./event-key";
+
+const base: BrokerageEvent = {
+	account: { id: "account-1", name: "Брокерский" },
+	date: "2026-08-20",
+	dateKind: "event",
+	displayName: "ОФЗ 26238",
+	figi: "FIGI",
+	instrumentUid: "UID",
+	isin: "RU000A0JX0J2",
+	logoName: null,
+	projectedAmount: { currency: "RUB", value: "100" },
+	ticker: "OFZ",
+	type: "coupon",
+};
+
+describe("brokerageEventGroupKey", () => {
+	it("uses date, preferred identity, exact type and dateKind", () => {
+		const key = brokerageEventGroupKey(base);
+
+		expect(brokerageEventGroupKey({
+			...base,
+			account: { id: "account-2", name: "ИИС" },
+			figi: "OTHER-FIGI",
+		})).toBe(key);
+		expect(brokerageEventGroupKey({ ...base, date: "2026-08-21" }))
+			.not.toBe(key);
+		expect(brokerageEventGroupKey({ ...base, dateKind: "registry" }))
+			.not.toBe(key);
+		expect(brokerageEventGroupKey({ ...base, type: "dividend" }))
+			.not.toBe(key);
+	});
+
+	it("falls back through FIGI and ISIN and rejects missing identity", () => {
+		expect(brokerageEventGroupKey({ ...base, instrumentUid: null }))
+			.toBe(brokerageEventGroupKey({ ...base, instrumentUid: "" }));
+		expect(brokerageEventGroupKey({
+			...base,
+			figi: null,
+			instrumentUid: null,
+		})).toBe(brokerageEventGroupKey({
+			...base,
+			figi: "",
+			instrumentUid: null,
+		}));
+		expect(brokerageEventGroupKey({
+			...base,
+			figi: null,
+			instrumentUid: null,
+			isin: null,
+		})).toBeNull();
+	});
+});