Data expansion:
Coverage is a measure of test integrity and test effectiveness. Represented by the executed code, used to evaluate reliability, stability and performance.
Test coverage is an evaluation of test integrity. Test coverage is represented by test requirements and test case coverage or execution code coverage. Based on the evaluation of test results and the analysis of change requests (defects) determined during the test.
Coverage index provides the answer to the question "How complete is the test?" The most commonly used coverage evaluation methods are requirement-based test coverage and code-based test coverage.
In short, test coverage is an arbitrary evaluation of the integrity of requirements (based on requirements) or code design/implementation standards (based on code), such as the verification of use cases (based on requirements) or the execution of all code lines (based on code).
The testing activities of the system are based on at least one test coverage strategy. Coverage strategy states the general purpose of testing and guides the design of test cases. Insurance policy statements can be as simple as verifying all performance.
If the requirements have been completely classified, a requirement-based coverage strategy may be sufficient to generate a measurable assessment of test integrity. For example, if all the performance test requirements have been determined, the test results can be referenced for evaluation, for example, 75% of the performance test requirements have been verified.