java category_Java JUnit框架里@Category注解的工作原理

Suppose you have a large number of unit test cases and you don’t want them to be executed all at the same time during Maven build. You can simply achieve it via annotation @Category.

(1) Create empty class FastTests and SlowTests. (2) In your test case class, categorize your test method using @Category annotation:

(3) Append the following code to your pom.xml:

SlowTests

com.sap.SlowTests

FastTests

com.sap.FastTests

org.apache.maven.plugins

maven-compiler-plugin

3.1

1.8

1.8

org.apache.maven.plugins

maven-surefire-plugin

2.13

org.apache.maven.surefire

surefire-junit47

2.13

${testcase.groups}

(4) In my project, by default all 7 test methods will be executed during Maven build:

Suppose you only want to execute unit test belonging to category “SlowTests”, use the following command line:

Since now I only marked one method with annotation SlowTests, only one test method is executed:

If you would like to execute all unit tests EXCEPT @SlowTests, simply add another profile in pom.xml:

NonSlowTests

org.apache.maven.plugins

maven-surefire-plugin

com.sap.SlowTests

Before test, in order to prove that Slow method is NOT really executed, I add a system.out.println in each method:

Use command line: mvn test -P NonSlowTests From console output, I can ensure that the method with @Category(SlowTests.class) is NOT executed at all.

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