How To Write Test Cases For Login Page

Writing test cases for a login page is an essential part of the software testing process. As a software tester, I have come across various scenarios and learned some best practices for writing effective test cases. In this article, I will share my insights and guide you on how to write test cases for a login page.

Understanding the Login Functionality

Before diving into writing test cases, it is crucial to understand the login functionality of the application. This will help us identify the different elements and scenarios that need to be tested.

During the login process, users typically enter their credentials, such as a username and password, to gain access to the application. The login page may also have features like ‘Remember Me,’ ‘Forgot Password,’ or ‘Social Login’ options. It is essential to consider all these aspects while writing test cases.

Identifying Test Scenarios

The next step is to identify various test scenarios that cover all possible cases. Here are some possible scenarios:

  1. Valid Credentials: Enter valid username and password and check if the user is successfully logged in.
  2. Invalid Credentials: Enter invalid username and password combinations and verify if appropriate error messages are displayed.
  3. Remember Me: Check if the ‘Remember Me’ functionality works as expected, by logging out and logging in again.
  4. Forgot Password: Test the ‘Forgot Password’ functionality and ensure that users can reset their passwords successfully.
  5. Social Login: If the application supports social login (e.g., login with Google or Facebook), test this feature and validate that users can log in using their social media accounts.

Writing Test Cases

Once we have identified the test scenarios, it’s time to write the actual test cases. Here is an example of how a test case for the ‘Valid Credentials’ scenario could be written:

Test Case 1: Valid Credentials
1. Enter a valid username in the username field.
2. Enter a valid password in the password field.
3. Click on the 'Login' button.
Expected Result: The user should be successfully logged in and redirected to the application's homepage.

Similarly, we can write test cases for all the identified scenarios. It’s essential to be thorough and cover all possible cases to minimize the risk of any issues in the login functionality.

Executing Test Cases

After writing the test cases, the next step is to execute them. While executing the test cases, make sure to follow the steps precisely and record the actual results. If there are any deviations from the expected results, note them down and report them to the development team.


Writing test cases for a login page is a critical aspect of software testing. By considering various scenarios and following best practices, we can ensure that the login functionality works as expected and provides a seamless user experience. So, the next time you are testing a login page, remember to cover all possible test scenarios and write effective test cases.