神火：suitesAndClasses和類

Question

之間的區別當我運行在神火測試，就是

<parallel>suitesAndClasses</parallel> 

和

<parallel>classes</parallel> 

第一個例子，似乎在並行運行我的測試類之間的區別，而第二個則沒有。

Answer 1

請在下面找到一個簡單的例子來驗證<parallel>classes</parallel>是否按預期工作。對<parallel>suitesAndClasses</parallel>的檢查，它將並行執行JUnit測試套件和正常的JUnit測試類。

的測試類

public class ParallelOneTest { 

    @Test 
    public void testOne() throws InterruptedException { 
     System.out.println("ParallelOneTest.testOne()"); 
     TimeUnit.SECONDS.sleep(5); 
    } 

    @Test 
    public void testTwo() throws InterruptedException { 
     System.out.println("ParallelOneTest.testTwo()"); 
     TimeUnit.SECONDS.sleep(5); 
    } 

    @Test 
    public void testThree() throws InterruptedException { 
     System.out.println("ParallelOneTest.testThree()"); 
     TimeUnit.SECONDS.sleep(5); 
    } 
} 

。

public class ParallelTwoTest { 

    @Test 
    public void testOne() throws InterruptedException { 
     System.out.println("ParallelTwoTest.testOne()"); 
     TimeUnit.SECONDS.sleep(5); 
    } 

    @Test 
    public void testTwo() throws InterruptedException { 
     System.out.println("ParallelTwoTest.testTwo()"); 
     TimeUnit.SECONDS.sleep(5); 
    } 

    @Test 
    public void testThree() throws InterruptedException { 
     System.out.println("ParallelTwoTest.testThree()"); 
     TimeUnit.SECONDS.sleep(5); 
    } 
} 

所有以下描述的試驗方案作爲mvn clean compile test

正常順序執行被執行

或者該文件pom.xml或至少沒有<parallel>...</parallel>子句爲它在沒有maven-surefire-plugin的配置。

順序輸出（剝離）

Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 15.07 sec 
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 15.008 sec 
... 
[INFO] ------------------- 
[INFO] BUILD SUCCESS  
[INFO] ------------------- 
[INFO] Total time: 31.919s 

並行執行

的pom.xml

<build> 
    <plugins> 
     <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-surefire-plugin</artifactId> 
      <version>2.18</version> 
      <configuration> 
       <parallel>classes</parallel> 
       <threadCount>2</threadCount> 
      </configuration> 
     </plugin> 
    </plugins> 
</build> 

並行輸出（剝離）

[INFO] parallel='classes', perCoreThreadCount=true, threadCount=2, ... 
... 
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 15.023 sec - in sub.optimal.mavenscratch.ParallelTwoTest 
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 15.023 sec - in sub.optimal.mavenscratch.ParallelOneTest 
... 
[INFO] ------------------- 
[INFO] BUILD SUCCESS  
[INFO] ------------------- 
[INFO] Total time: 16.770s 

正如您在第二個示例（基於總時間）中看到的，這兩個測試類都是並行執行的。

對於並行選項suitesAndClasses，可以配置許多類<threadCountClasses>和測試套件threadCountSuites可以並行執行。