Gradle：如何将 output 从测试 STDERR/STDOUT 获取到控制台？

Question

(Gradle 3.2.1) I run some java tests, which logs output in Stderr/Stdout. I can see that output, if I start

gradle test --info

but in that case, much of unwanted output from 3-rd party libraries is there too.

Documentation suggests using logging.caputureStandardError / logging.caputureStandardError (loglevel) , but it doesn't seem to have any effect.

tasks.withType(Test) {
   logging.captureStandardOutput LogLevel.QUIET
   logging.captureStandardError LogLevel.QUIET
}

Then if running gradle test , not STDERR/STDOUT is output in console.

How can I get just the output from the tests classes in console?

Answer 1

Add these lines to build.gradle :

apply plugin: 'java'

test {
    dependsOn cleanTest
    testLogging.showStandardStreams = true
}

Notice: dependsOn cleanTest is not necessary but if not used , you need to run cleanTest or clean task before test task.

---

Edit:

A better approach:

apply plugin: 'java'

test {
    testLogging {
        outputs.upToDateWhen {false}
        showStandardStreams = true
    }
}

Notice: outputs.upToDateWhen {false} is not necessary but if not used , you need to run cleanTest or clean task before test task.

For more info and options see the documentation .

Answer 2

For those using kotlin/kotlin dsl for gradle, you need to put the following in your build.grade.kts file:

tasks.withType<Test> {
    this.testLogging {
        this.showStandardStreams = true
    }
}

Also as mentioned in another answer, you will need to run "gradle clean test" for the output to print every time.

Answer 3

The testLogging answer is correct. For me, since I already had a tasks.test section, I figured it'd be easier to put it there instead.

tasks.test {
    useJUnitPlatform()
    this.testLogging {
        this.showStandardStreams = true
    }
}

Answer 4

Extending on @Talha Malik solution's above (and the ones in this other post ), when dealing with a multi-module android app the following can be used (root build.gradle )

// Call from root build.gradle
setupTestLogging()

fun Project.setupTestLogging() {
    for (sub in subprojects) {
        sub.tasks.withType<Test> {
            testLogging {
                exceptionFormat = TestExceptionFormat.FULL
            }
        }
    }
}

(note that while exceptionFormat alone should be enough to get the wanted outcome, the events("standardOut"...) mentioned above can be specified in the same way)