add shouldPopoverUseScrollViewTest unit test

Author: nyomanjyotisa

tests/unit/shouldPopoverUseScrollViewTest.ts

@@ -0,0 +1,39 @@
+import type {DropdownOption} from '@components/ButtonWithDropdownMenu/types';
+import shouldPopoverUseScrollView from '@libs/shouldPopoverUseScrollView';
+import CONST from '@src/CONST';
+
+describe('shouldPopoverUseScrollView', () => {
+    const createOption = (value: string, subMenuItems?: Array<{value: string; text: string}>): DropdownOption<string> => ({
+        value,
+        text: value,
+        ...(subMenuItems && {subMenuItems: subMenuItems.map((item) => ({...item, key: item.value}))}),
+    });
+
+    it('returns false when there are few top-level options and no large submenus', () => {
+        const options = [createOption('a'), createOption('b'), createOption('c')];
+        expect(shouldPopoverUseScrollView(options)).toBe(false);
+    });
+
+    it('returns true when there are 5 or more top-level options', () => {
+        const options = Array.from({length: CONST.DROPDOWN_SCROLL_THRESHOLD}, (_, i) => createOption(`option-${i}`));
+        expect(shouldPopoverUseScrollView(options)).toBe(true);
+    });
+
+    it('returns true when any option has 5 or more submenu items', () => {
+        const subMenuItems = Array.from({length: CONST.DROPDOWN_SCROLL_THRESHOLD}, (_, i) => ({
+            value: `sub-${i}`,
+            text: `Sub ${i}`,
+        }));
+        const options = [createOption('parent', subMenuItems)];
+        expect(shouldPopoverUseScrollView(options)).toBe(true);
+    });
+
+    it('returns false when submenu has fewer than threshold items', () => {
+        const subMenuItems = [
+            {value: 'sub-1', text: 'Sub 1'},
+            {value: 'sub-2', text: 'Sub 2'},
+        ];
+        const options = [createOption('parent', subMenuItems)];
+        expect(shouldPopoverUseScrollView(options)).toBe(false);
+    });
+});