add unit tests

Author: dmkt9

tests/unit/UserUtilsTest.ts

@@ -1,3 +1,4 @@
+import * as defaultAvatars from '@components/Icon/DefaultAvatars';
 import * as UserUtils from '@src/libs/UserUtils';
 
 describe('UserUtils', () => {
@@ -6,12 +7,22 @@ describe('UserUtils', () => {
         const defaultAvatar = UserUtils.getAvatar(avatarURL, 1);
 
         expect(typeof defaultAvatar).toBe('function');
+
+        const defaultAvatarUrl = UserUtils.getAvatarUrl(avatarURL, 1);
+
+        expect(defaultAvatarUrl).toBe('https://d2k5nsl2zxldvw.cloudfront.net/images/avatars/default-avatar_7.png');
+        // Both defaultAvatar and defaultAvatarUrl must be `defaultAvatars.Avatar7`
+        expect(defaultAvatar === defaultAvatars.Avatar7).toBeTruthy();
     });
 
     it('should return the same url if url is not for default avatar', () => {
         const avatarURL = 'https://test.com/images/some_avatar.png';
         const avatar = UserUtils.getAvatar(avatarURL, 1);
 
         expect(avatar).toEqual('https://test.com/images/some_avatar.png');
+
+        const avatarUrl = UserUtils.getAvatarUrl(avatarURL, 1);
+
+        expect(avatarUrl).toEqual('https://test.com/images/some_avatar.png');
     });
 });