Explain Bottom Up testing, boundary testing and branch testing.

What is Bottom Up Testing?

- A part of integration testing.

-The lowest level components are tested first, followed by testing higher level components.

-The process is repeated until the testing components at the top of the hierarchy are tested.

What is Boundary testing?

-A type of testing which focuses on boundary or limit conditions of the software.

-Stress Tests are part of Boundary Testing.

What is Branch Testing?

-All branches of the application program are tested at least once.