## 一句話引發的"血案" 官方文檔中關于test的信息有這么一句話: ~~~ The test process can be started in debug mode (see getDebug()) in an ad-hoc manner by supplying the `--debug-jvm` switch when invoking the build. gradle someTestTask --debug-jvm ~~~ 但是如果我們在命令行下敲這個命令，會出現如下信息： ~~~ D:\eclipse\workspare\TestNG_gradl>gradle clean test --debug-jvm :clean :compileJava :processResources :classes :compileTestJava :processTestResources :testClasses :test Listening for transport dt_socket at address: 5005 > Building 87% > :test ~~~ 光標會一直在這閃爍，到底有啥用呢？搞了一上午，找到了[一篇文章](http://www.cnblogs.com/warrior/p/3835240.html)，恍然大悟。 這個--debug-jvm的參數會在執行測試的時候一直監聽5005端口的信息，那么這個信息從哪里來？我慢慢道來。 ## 2.以TestNG為例 我的測試任務代碼如下，就是啟動TestNG測試，然后在測試前輸出一句話，測試case中的輸出信息也要輸出。 ~~~ test { useTestNG() //systemProperty 'some.prop', 'value' //exclude 'org/gradle/SimpleTest.class' //reports.html.enabled = true //scanForTestClasses = false beforeTest { descriptor -> logger.lifecycle("Running test: " + descriptor) } onOutput { descriptor, event -> logger.lifecycle("Test: " + descriptor + " produced standard out/err: " + event.message ) } } ~~~ 這個時候我們在eclipse中debug模式啟動我們的case。但是要注意一點不是直接Debug as->TestNG。具體配置如下：  進入Debug Configurations界面  點New以后會自動添加你要測試的類，但是這個時候要注意一定要把端口改成你在命令行監聽的端口號5005。如果命令行上是其他端口，只要跟其一樣就行。  這個時候你點擊Debug就會發現，命令行有輸出了。 ~~~ Running test: test method aFastTest(org.gradle.SimpleTest) Test: test method aFastTest(org.gradle.SimpleTest) produced standard out/err: fa st test Running test: test method aSlowTest(org.gradle.SimpleTest) Test: test method aSlowTest(org.gradle.SimpleTest) produced standard out/err: sl ow test Test: test 'Gradle test' produced standard out/err: tearDown Test: test 'Gradle test' produced standard out/err: setUp Running test: test method aFastTest1(org.gradle.SimpleTest1) Test: test method aFastTest1(org.gradle.SimpleTest1) produced standard out/err: fast test1 Running test: test method aSlowTest1(org.gradle.SimpleTest1) > Building 87% > :test > 3 tests completed ~~~ 而且還會等待debug的case結束。這就是debug模式.