more test

ui/apps/platform/src/hooks/useSet.test.ts

@@ -1,7 +1,29 @@
 import { renderHook, act } from '@testing-library/react-hooks';
 import useSet from './useSet';
 
-test('useSet should correctly toggle items', () => {
+test('useSet should accept a starting set', () => {
+    // Membership is based on reference equality
+    const objA = { test: 'test' };
+    const objB = { test: 'test' };
+
+    const { result } = renderHook(() => {
+        const set = useSet(new Set([objA]));
+        return set;
+    });
+
+    expect(result.current.has(objA)).toBeTruthy();
+    expect(result.current.has(objB)).toBeFalsy();
+
+    act(() => {
+        result.current.toggle(objA);
+        result.current.toggle(objB);
+    });
+
+    expect(result.current.has(objA)).toBeFalsy();
+    expect(result.current.has(objB)).toBeTruthy();
+});
+
+test('useSet should correctly toggle items and report their membership', () => {
     const { result } = renderHook(() => {
         const set = useSet<string>();
         return set;