refactor: share path-root query predicate (WealthLedger/frontend#142) (#154)

src/shared/api/query-predicate.test.ts

@@ -0,0 +1,26 @@
+import { describe, expect, it } from "vitest";
+
+import { isGetUnder } from "./query-predicate";
+
+describe("isGetUnder", () => {
+	it("matches the root itself and nested paths for get queries only", () => {
+		const predicate = isGetUnder(["/api/v1/bank-cards"]);
+
+		expect(predicate(["get", "/api/v1/bank-cards"])).toBe(true);
+		expect(predicate(["get", "/api/v1/bank-cards/{id}"])).toBe(true);
+		expect(predicate(["get", "/api/v1/bank-cards"])).toBe(true);
+		expect(predicate(["get", "/api/v1/bank-cardsx"])).toBe(false);
+		expect(predicate(["post", "/api/v1/bank-cards"])).toBe(false);
+		expect(predicate(["get", "/api/v1/other"])).toBe(false);
+	});
+
+	it("checks every root and tolerates init and non-string parts", () => {
+		const predicate = isGetUnder(["/api/v1/stocks", "/api/v1/bonds"]);
+
+		expect(predicate(["get", "/api/v1/stocks/{uid}/quote", { params: {} }]))
+			.toBe(true);
+		expect(predicate(["get", "/api/v1/bonds"])).toBe(true);
+		expect(predicate([undefined, "/api/v1/stocks"])).toBe(false);
+		expect(predicate(["get", undefined])).toBe(false);
+	});
+});