How do you test a software or a feature without any requirement?

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 1. Exploratory Testing: In this type of testing the Test design and execution happen simultaneously.

The tester can explore different paths in the application and note down those test cases.


2. Error Guessing: Based on previous experience with similar software or feature, the tester can draw out some test cases and execute them.


3. Ad-Hoc testing: This is the most simple type of testing. This is an unplanned test.

There are different types of Ad-Hoc testing:

 - Monkey testing: Here you test to break the software by clicking anywhere on the screen.

- Pair testing: Here 2 testers are assigned the same module for testing. They can share their ideas on the feature and draw out some test cases and also execute them together.

- Buddy Testing: Here a Developer and a Tester are assigned one Module and they try to understand the working of that module.

4. Catch the Developers and QA Team members: Talk to the Devs and QAs who have worked previously on that piece of software.

5. Explore other artifacts and test with whatever few documentation is available.

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