Unit testing, integration testing, System testing differences

First, the test method is different

1. Unit test belongs to the category of white box testing.

2, the integration test belongs to the grey box testing category.

3, the system test belongs to the black box testing category.

Second, the scope of investigation is different

1. Unit test the data structure, logic control and exception handling inside the main test unit.

2, integration test the interface between the main test module and interface data transfer relationship, as well as the overall function after the module combination.

3, the system test mainly test the whole system relative to the requirements of the degree of compliance.

Iii. evaluation criteria are different

1. The Evaluation datum of unit test is mainly logical coverage.

2, the evaluation benchmark of integration testing is mainly interface coverage.

3. The evaluation benchmark of the system test is mainly the coverage of the test case to the requirement specification.

Unit testing, integration testing, System testing differences