通过junit写unit test

how to run test within junit & mvn:

During team development , there are more than 1 person edit your api or file which it's very common. And to improve your api stablity and quality, it's critical important to write unit test.

run all test

mvn test

run specific test

Sometimes we have thousands of unit test, but you need to test only some testcase you have just wrote for verify some case you can specific your only test case:

mvn -Dtest=TestApp1 test

run exclude some specific case

Meanwhile you may exclude some unrelated test case(or include some test case) for a quick verify.

for example, skip TestApp2.java, edit your pom.xml:

<build>
<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.19.1</version>
    <configuration>
      <excludes>
        <exclude>**/TestApp2.java</exclude>
      </excludes>
    </configuration>
  </plugin>
</plugins>   </build>

serval common case log:

• when not pass test:

Running com.wade.core.TestApp1 Tests run: 1, Failures: 1, Errors: 0,

Skipped: 0, Time elapsed: 0.091 sec <<< FAILURE!

testHelloworld(com.wade.core.TestApp1) Time elapsed: 0.022 sec <<<

FAILURE! junit.framework.ComparisonFailure: expected:<Hello[W]orld>

but was:<Hello[w]orld> at

junit.framework.Assert.assertEquals(Assert.java:100)

• pass test:

Running com.wade.core.TestApp1 Tests run: 1, Failures: 0, Errors: 0,

Skipped: 0, Time elapsed: 0.093 sec Running com.wade.core.TestApp2

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 sec

Results :

Tests run: 2, Failures: 0, Errors: 0, Skipped: 0

• compile error:

[INFO] BUILD FAILURE [INFO]

------------------------------------------------------------------------ [INFO] Total time: 1.392 s [INFO] Finished at:

2016-07-10T23:15:34+08:00 [INFO] Final Memory: 14M/165M [INFO]

------------------------------------------------------------------------ [ERROR] Failed to execute goal

org.apache.maven.plugins:maven-compiler-plugin:3.1:testCompile

(default-testCompile) on project unittest: Compilation failure:

Compilation failure: [ERROR]

/Users/dengwei/projects/github/javacourse/unittest/src/test/java/com/wade/TestApp2.java:[8,61]

';' expected [ERROR]

/Users/dengwei/projects/github/javacourse/unittest/src/test/java/com/wade/TestApp1.java:[8,59]

';' expected [ERROR] -> [Help 1] [ERROR]

Appendix:

• junit
• junit hello world
• junit mvn configuration in pom.xml
• src