test(core): add isRecord unit tests for json-types

src/lib/core/json-types.test.ts

@@ -0,0 +1,44 @@
+// SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+import { describe, expect, it } from "vitest";
+import { isRecord } from "./json-types";
+
+describe("isRecord", () => {
+  it("returns true for a plain object", () => {
+    expect(isRecord({ key: "value" })).toBe(true);
+  });
+
+  it("returns true for an empty object", () => {
+    expect(isRecord({})).toBe(true);
+  });
+
+  it("returns true for a nested object", () => {
+    expect(isRecord({ a: { b: 1 } })).toBe(true);
+  });
+
+  it("returns false for null", () => {
+    expect(isRecord(null)).toBe(false);
+  });
+
+  it("returns false for undefined", () => {
+    expect(isRecord(undefined)).toBe(false);
+  });
+
+  it("returns false for an array", () => {
+    expect(isRecord([])).toBe(false);
+    expect(isRecord([1, 2, 3])).toBe(false);
+  });
+
+  it("returns false for a string", () => {
+    expect(isRecord("hello")).toBe(false);
+  });
+
+  it("returns false for a number", () => {
+    expect(isRecord(42)).toBe(false);
+  });
+
+  it("returns false for a boolean", () => {
+    expect(isRecord(true)).toBe(false);
+  });
+});