Integration testing of software testing

1. The concept of integration testing

1. Integration testing is also called assembly testing, joint testing, subsystem testing or component testing.

2. Integration testing is to assemble all modules into subsystems or systems according to the outline design requirements (such as according to the structure diagram) on the basis of unit testing, and conduct integration testing.

2. The purpose of integration testing

1. Find out the problem of module interface and overall architecture;

2. Ensure that the components can work together as intended when combined, and ensure that the incremental behavior is correct;

3. Integration testing is a gray box test;

1) Verify that the interface conforms to the design;

2) Discover errors in design and requirements.

3. The focus of integration testing

Although some modules can work normally alone, they cannot be guaranteed to work normally when connected. Problems that cannot be reflected in some parts of the program may be exposed globally and affect the realization of functions.

Therefore, integration testing should consider two questions:

1. Interface between modules (there are two points to consider)

1) When connecting each module, whether the data passing through the module interface will be lost;

2) Is there any problem with the global data structure and will it be modified abnormally?

2. Integrated functions (three points need to be considered)

1) Can the sub-functions be combined to achieve the expected parent function;

2)Whether the function of one module will adversely affect the function of another module;

3) Will the accumulated errors of a single module be amplified to an unacceptable level?

4. The level of integration testing

The development process of a product includes a layered design and gradual refinement process. From the initial product to the smallest unit, it can be divided into: product -> subsystem -> hardware subsystem, software subsystem——> Software Modules —— Software Programs ——> Units.

Generally, unit testing is aimed at the smallest unit structure, and system testing corresponds to the product level, and all layers of testing in it need to be completed through integration testing. Due to the different strengths of integration, integration testing is divided into three levels:

1. In-module integration test (after the unit test is completed)

2. Intra-subsystem integration testing, that is, inter-module integration testing

3. Integration testing between subsystems

For more information on testing technology, please pay attention to: Shenzhen Multi-Tester Software and Technology Service Co., Ltd.