fix(test): adding unit tests for new random func

Author: ChronosSF

projects/igniteui-angular/src/lib/grids/common/random.spec.ts

@@ -0,0 +1,26 @@
+import { getUUID } from './random';
+
+describe('Random (crypto.randomUuid()) fallback unit tests', () => {
+    let originalRandomUuid = crypto.randomUUID;
+
+    beforeAll(() => {
+        crypto.randomUUID = null; // Mock crypto.randomUUID to simulate a non-secure context
+    });
+
+    it('should generate a valid UUID', () => {
+        const uuid = getUUID();
+        expect(uuid).toMatch(/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/);
+    });
+
+    it('should generate unique UUIDs', () => {
+        const uuids = new Set();
+        for (let i = 0; i < 100; i++) {
+            uuids.add(getUUID());
+        }
+        expect(uuids.size).toBe(100); // All UUIDs should be unique
+    });
+
+    afterAll(() => {
+        crypto.randomUUID = originalRandomUuid; // Restore the original function
+    });
+});