What is coverage and what are the different types of coverage techniques?

Coverage is a measurement used in software testing to describe the degree to which the source code is tested. There are three basic types of coverage techniques as shown in the following figure:

- Statement coverage: This coverage ensures that each line of source code has been executed and tested.

- Decision coverage: This coverage ensures that every decision (true/false) in the source code has been executed and tested.

- Path coverage: In this coverage we ensure that every possible route through a given part of code is executed and tested.