JUnit Unit test of Java EE

1 Write a test class and simply understand how junit can be partially used to replace Java's Main method

2 Add annotations on the test class method @Test

3 @Test Modified method requires: Publicvoid Method name () {...}, method name custom recommendation test begins with no parameters. That is, JUnit can only run the modifier to public and return the null argument method with the value type void .

@Before: Executed before the unit test @Test can be used to get some resources

@After: Executes after the unit test @Test and can be used to use some resources

Note : @Before and @After cannot be executed separately , run @Test they will automatically execute

4 Execution :

Select the method you want to execute , right-click run as-->junit Test

Execute multiple methods at once: Select Class , right-click run as-->junit Test

JUnit Unit test of Java EE