Test data

Test Data is the data which is need to execute test case to test software. Mostly test cases need test data to execute. Test data can be store in simple excel file and used manually or can be read from XML, Database or flat files automatically. Mostly test data created by tester or sometime provided by developers or client. In the case when test data provided by the client first they do filtration on data if it contains some sensitive information in it. In the regression testing most of time test data is re-used.

Types of Test Data:

1. Valid Test Data
   
2. Invalid Test Data

Valid Test Data: Valid test data is used to execute positive test cases. test data will be in the same format as expected by test application.
Invalid Test Data: Invalid test data is used to execute negative test cases. test data will not be in the format as expected by test application.