Testing at the UI Level

Aleksandr Chistiakov
13 min readadvanced
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Overview

The article discusses the importance of automated UI testing in software development, emphasizing the distinction between testing through the UI and testing the UI itself. It highlights the risks of relying solely on UI tests and provides guidelines for effective implementation.

What You'll Learn

1

How to differentiate between testing through the UI and testing the UI itself

2

Why maintaining a balance between UI tests and lower-level tests is crucial for software quality

3

When to implement UI tests as acceptance criteria in your development process

Prerequisites & Requirements

  • Understanding of software testing principles
  • Familiarity with automated testing frameworks(optional)

Key Questions Answered

What is the difference between testing through the UI and testing the UI?
Testing through the UI focuses on the overall flow of the application, while testing the UI emphasizes the functional aspects of individual components. This distinction is crucial to prevent UI tests from becoming overly complex and unmanageable.
What should be included in UI tests?
UI tests should focus on key business flows and ensure that basic functionalities, like user registration and purchasing, complete correctly. Detailed business rules should be tested at lower levels to avoid complexity in UI tests.
When should new UI tests be considered?
New UI tests should only be considered if lower-level automation cannot achieve the same coverage. Teams should assess whether refactoring is possible to allow for lower-level testing before adding UI tests.
What are common pitfalls in UI testing?
Common pitfalls include creating overly complex tests that are hard to maintain and relying solely on UI tests, which can lead to false confidence in the application’s quality. It's important to balance UI tests with lower-level testing for better reliability.

Key Actionable Insights

1
Focus on implementing UI tests that validate key user flows rather than every detail of the application.
This approach minimizes maintenance overhead and ensures that tests remain relevant and manageable as the application evolves.
2
Regularly review and refactor your UI tests to maintain clarity and effectiveness.
As the application changes, tests can become outdated or overly complex. Refactoring helps keep tests aligned with current application behavior.
3
Use visual testing tools to validate data rendering from APIs to the UI.
Visual testing can catch discrepancies between expected and actual UI states, ensuring that data is presented correctly to users.

Common Pitfalls

1
Relying solely on UI tests can lead to a false sense of security regarding application quality.
This happens because UI tests may pass while underlying issues exist. It's essential to integrate lower-level tests to provide a comprehensive quality assurance strategy.
2
Creating a large number of UI tests can lead to diminishing returns in maintenance effort.
As the number of tests grows, the effort required to maintain them can outweigh the benefits, making it crucial to prioritize which tests are truly necessary.