What should a good test case look like?

A good test case should be:

• Clear and understandable: the description of steps should be unambiguous so that any tester can reproduce the test.
• Isolated: the test case verifies a specific functionality that does not depend on other tests.
• Reproducible: it should give the same result upon repeated execution.
• Complete: includes preconditions, steps, expected result, and postconditions.
• Relevant: reflects the current logic and requirements of the system.

Example of a test case structure:

Title: Successful authorization check
Preconditions: User is registered in the system
Steps:
  1. Open the login page
  2. Enter correct login and password
  3. Click the "Login" button
Expected result: User is successfully authorized and redirected to the main page
Postconditions: User is in the system