Sequence to write a test case.

Firstly you write the test scenarios, in that tester write test cases, the test scenarios writing by using system requirements by system analyst,
the test data is the some selected inputs entering by the tester to find any defects in the software, test script is coding in VB script language, test scrips are only using in automation testing only.

Test Levels : Unit Testing, Integration Testing,System Testing,User acceptance Testing
Test Methods :- white Box,Black Box,Grey Box Testing
Test Types :- Smoke testing,Sanity testing,Configuration testing,Compatibility testing,Security testing,Load testing,Stress testing,
Test approaches :- Top-down , bottom-up,sandwich testing approaches