So in the process of software development, what are the commonly used unit testing methods, and how to achieve a good unit test? The following Gansu computer training introduces the specific methods of Java unit testing for everyone.
1, using the framework for unit testing Java can provide a framework for unit testing methods. In the process of testing, testing NG and JUnit are popular testing frameworks now.
JUnit and TestNG framework tests have several important functions: easy to set up and run; Allow multiple tests to be ignored or grouped and run together; Supporting parametric testing, Gansu IT training found that unit testing can be performed by specifying different values at runtime.
2. Use test-driven development cautiously. Test-driven development is a process of software development.
In the whole development process, at the beginning of coding, programming test should be carried out according to the requirements of the program.
However, IT training in Gansu found that the initial test would fail, because there was no programming at this time, and only a small amount of code was needed to pass the test and reset the code.
3. Coverage of test code Code coverage is the percentage of the amount of code executed when performing unit tests.
Generally, the probability of high coverage code containing undetected errors is low, because more source code is executed in the test.
Tools for testing code coverage are Clover, Corbetura and JaCoCo.
Testing with tools can better improve the quality of testing.
4. Optimize the test data externally before June 4th. The data executed by the test case must be hard-coded by the test case, which will cause restrictions.
In order to perform tests with different data, the test case code must be modified.
However, Gansu Computer Training believes that JUnit4 and TestNG support the externalization of test data and can execute test cases on different data groups without changing the source code.