Introduction to Functional testing
Functional testing is a type of black-box testing on the specifications of the software component under test that bases its test cases & a QA (quality assurance) process. Functions are examining the output & tested by feeding them input, & internal program structure is unlike white-box testing is rarely considered.
Functional Testing Job Support
What the system does usually describes functional testing. Functional testing does not imply a function method of your module /class that you are testing. Functionality of the whole system tested with functional testing. Functional testing differs from system testing in that functional testing “verifies a program by checking it against specification(s) or design document(s) “. While system testing “by checking validate a program it against the system requirements or published user”
Functional testing has 4 types:
- Smoke testing
- Sanity testing
- Regression testing
- Usability testing
In computer programming & software testing, smoke testing also sanity testing ,confidence testing, to reveal simple failures severe enough to preliminary testing (for example) reject a prospective software release.
A sanity test \ sanity check is a claim or the result of a calculation can possibly be true, whether a basic test to quickly evaluate. The produced material is rational that the material’s creator was thinking rationally It is a simple check to see if applying sanity.
Regression testing it was changed or interfaced with other software a tested still performs correctly even after & type of software testing that verifies that software previously developed.
Usability testing can be seen since it gives direct input on how real users use the system ,as an irreplaceable usability practice. Usability testing is a technique used to evaluate a product by testing it on users in user-centered interaction design.