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Under the background of frequent iterations of Internet products, the time of regression testing is getting less and less, so it is difficult to do a complete regression test of all functions in each iteration cycle. Even if there is a relatively complete UI automation (version iteration brings UI changes, high maintenance costs, limited output rate), it is very time-consuming, the product has a variety of functions, and the whole UI automation will take several hours to run. However, interface automation testing is more and more recognized by the majority of companies because of its simple implementation, relatively low maintenance cost, easy to improve coverage and so on.

The development model has changed a lot since 2015. on the one hand, it is the requirement of the development of technology, on the other hand, the personnel is more specialized and the division of labor is clearer, and the other is the rapid iteration of the product, which requires agility. So one of the biggest features of the development model is the separation of front and rear, so what does this mean?

From a testing point of view, a problem is clearly known. Whether it is a front-end problem or a background problem, front-end separation means rich service client, light client, a large number of algorithms, business, and interaction are handed over to the server, and the front-end only does user experience and user interaction. All such complex logic is handled by the server, which only needs to be uniformly output through API, one server to multiple front-ends (web, H5, android, iOS, Wechat Enterprise number, etc.). This API directly affects whether all clients work properly.

Core: ensuring the stability of the system

As a part of quality management, interface testing ensures the correctness and stability of the system. The closer a system service is to the bottom, the greater the impact on the system. A defect in the server may cause the collapse of the whole client, and the loss is inestimable.

Objective: to improve testing efficiency, enhance user experience and reduce the cost of product research and development

Interface testing strengthens the confidence of development and testing, exposes implicit bug in advance, makes functional testing easier, reduces the occurrence of underlying bug, makes front-end research and development more smooth, shortens development cycle, and improves development quality.

The significance of Interface testing

Interface testing is not the same as unit testing. The value of interface testing lies in less input than unit testing, less technical difficulty than unit testing, testing granularity coarser than unit testing, and interface level testing based on subsystems or sub-modules.

The interface to be tested in the interface test is much less than the cost of the unit test, so the maintenance cost of the interface test code is lower than that of the unit test, the input is small, but the output is considerable.

With the help of interface testing, the correctness of interface calls in various application scenarios can be ensured, and the quality of subsystems or sub-modules can be fully guaranteed. The various scenarios here are:

1. Rapid implementation and maintenance of business scenarios

two。 The running environment can be switched quickly, and a set of API scripts can be modified slightly, which can be quickly verified in the test environment, pre-release environment, or even production environment, which can not be compared with functional testing.

Finally, interface testing can be automated and sustainable integration, which is the source of low cost and high benefit of interface testing.

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