Test data
data which has been specifically identified as input for or output from tests, typically of a computer program
Test data is the data that is used in tests of a software system.
In order to test a software application you need to enter some data for testing most of the features. Any such specifically identified data which is used in tests is known as test data.
Some test data is used to confirm the expected result, i.e. when test data is entered the expected result should come and some test data is used to verify the software behaviour to invalid input data.