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5 Common Bugs Faced in UI Testing

By Jash Unadkat, Technical Content Writer at BrowserStack -

Table of Contents

Software Testing is a vital stage in the software development life cycle. QA engineers encounter many critical bugs while testing a variety of web applications.

That said, some bugs tend to appear more frequently than others. This article aims to point out the most common bugs in web applications and how you can keep a tab of them. Knowing them will help the QA community ensure that they do not miss out on detecting and resolving them while performing their next test.

Most Common Bugs in Web Applications

Here is the list of the most common bugs in web applications:

  1. Cross Browser Adaptability Bugs
  2. Form Validation Bugs
  3. Usability Bugs
  4. Inconsistencies in the Page Layout across Devices
  5. Broken UI Elements leading to Misbehaviour

Cross Browser Adaptability Bugs

If a web app is not tested for cross-browser compatibility, it may lead to a bad user experience and eventually result in revenue loss. Hence, QAs must perform browser compatibility testing for their web applications using test automation frameworks like Selenium. This helps ensure that their web apps are easily accessible by users across multiple browsers. It also provides users who might be using older browser versions can use a web app with no issues.

BrowserStack offers QAs the ability to perform cross browser testing on real browsers like Chrome, Firefox, Safari, etc., including their older versions. Sign up for free, and start testing.

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Form Validation Bugs

These bugs are often overlooked as they are considered a low priority. In this case, a form might misbehave or throw errors if invalid characters are entered in the validation fields. Surpassing the maximum length of an input field also leads to errors.

Developers must follow certain practices to avoid a malfunction while setting up the validation logic. Best practices include:

  1. Limiting the number of characters for specific fields like Zip Code, ID, and Telephone numbers. For example, You can restrict the maximum length of the Zipcode field to 6 digits. Care must also be taken to ensure that certain countries (like the UK) have alpha-numeric Zip codes, which should be permitted.
  2. Defining the maximum length of the alpha-numerical password a user can set. Pre-define if special characters are supported. For example, for users to set strong passwords, the password policy can be as follows:
  • The password should be alpha-numerical
  • The password must contain a minimum of 6 characters and a maximum of 15 characters.
  • Password must have a special character like @, ! or ().

Following the practices above, developers can ensure that most common bugs in web applications are avoided and provide enhanced data integrity.

Usability Bugs

If the developed web application is not user-friendly, it might be annoying for end-users. If users are not able to easily access the critical functionalities of the application, it translates to a bad user experience. All key functionalities or features must be available upfront on the home page or main menu.

Easy navigation helps users understand all key features of the application and also enhances the user experience. Developers should design in a way that facilitates an easy understanding of the app architecture for the user. You can do this by providing quick tutorials when a user explores the app for the first time or by providing a Help section.

Inconsistencies in the Page Layout across Devices

Web applications tend to suffer from rendering inconsistencies when accessed through devices with different screen sizes. Such bugs might lead to the loss of potential customers and revenue, especially in the case of e-commerce sites or apps. Hence developers must conduct or access some research on the mobile-browser combinations used by the target audience. Then accordingly, they can focus on testing and optimizing for those mobile devices and browsers.

This ensures that the web app is responsive across multiple devices like tablets, smartphones, desktops, etc. Teams can use tools like a Responsive checker to ensure that their page layouts are consistent and flawless across devices.

Broken UI Elements leading to Misbehaviour

Some dysfunctional UI elements like buttons or text fields might remain uncovered during initial testing. However, these bugs are critical and can damage the web app’s functionality if not eliminated in the early stages. Such bugs might end up crashing an entire mobile or web application. For example, an ‘Update Profile’ button in the profile settings may not be functional, and repeated clicks might crash the app.

It is crucial for teams to verify that every component of a site is thoroughly tested before launching it. The list of bugs detailed above can offer QAs some awareness on what bugs to look out for so that they can identify and debug with ease and speed. This streamlines the testing process, resulting in better management of time, effort, and resources in the overall development span.

Parasoft conducted a survey and found that a few major challenges in UI testing are the lack of devices, debugging, time taken for testing and identifying elements.

ui bugs

UI Testing Checklist

UI testing is a very broad testing type and requires time. Therefore we came up with a basic checklist that will help you test faster.

These are the few things you need to check for when testing the UI.

  1. Is your app consistent across different pages? Check for consistency in brand colours, font, spacing, buttons, etc.
  2. Check for typography. Is the text easily readable?
  3. Check for spelling and grammar.
  4. The behaviour of interactive elements.
  5. Is the website or app adaptable across different screen sizes?
  6. Check for navigation speed.

Is your Website Responsive across all devices?

Check what your customers see, with our FREE Responsive Checker Tool.

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