Add utils/search unit tests (#8267)

app/utils/search/index.test.ts

@@ -0,0 +1,29 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import {TabTypes, type TabType} from '.';
+
+describe('TabTypes', () => {
+    it('should create a mirrored object with keys equal to their values', () => {
+        expect(TabTypes).toEqual({
+            MESSAGES: 'MESSAGES',
+            FILES: 'FILES',
+        });
+    });
+
+    it('should allow valid keys for TabType', () => {
+        const validTabType1: TabType = 'MESSAGES';
+        const validTabType2: TabType = 'FILES';
+
+        // Ensure that validTabType1 and validTabType2 match the types in TabTypes
+        expect(validTabType1).toBe('MESSAGES');
+        expect(validTabType2).toBe('FILES');
+    });
+
+    it('should not allow invalid keys for TabType', () => {
+        // TypeScript will catch this as an error, but we can simulate with a custom runtime check
+        const invalidTabType = 'INVALID_TAB_TYPE' as TabType;
+
+        expect(TabTypes[invalidTabType]).toBeUndefined(); // Simulate invalid key behavior
+    });
+});