Customize Junit 4 XML report

Question

Background:

TestNG supports adding your own Reporter classes in order to modify the reports being generated or generating new reports as needed.

However, JUnit doesn't have such a functionality, so a brute-force way would be to write your own Runner and then generate your own custom report.

But, I ask this question in order to find if there is something better?

Basically, I want to add custom attribute to every executed method.

<testcase name="test_test_something" classname="some.class.name" time="0.069" my-own-attribute="somevalue"/>

So my question is:

• How is this XML report generated by JUnit and Gradle?

• Is there a way to modify this process of report generation to add custom data to the report while doing minimal changes?

Answer 1

How is this XML report generated by JUnit and Gradle?

It’s eventually generated by the Gradle internal class org.gradle.api.internal.tasks.testing.junit.result.JUnitXmlResultWriter.

Basically, I want to add custom attribute to every executed method.

<testcase name="test_test_something" classname="some.class.name" time="0.069" my-own-attribute="somevalue"/>

[…] Is there a way to modify this process of report generation to add custom data to the report while doing minimal changes?

Unfortunately, there is no way to add further attributes to the <testcase/> element. This code shows how the element and its attributes are currently created; there is no way to hook into that creation process.

---

If you can live with a hacky solution, then you could try writing your custom data to StdOut/StdErr during the test and set the outputPerTestCase property as follows:

// (configuring the default `test` task of the `java` plugin here; works with
// any task of Gradle’s `Test` type, though)
test {
    reports {
        junitXml {
            outputPerTestCase = true
        }
    }
}

The written output will then end up at least somewhere within the <testcase/> element and you might be able use it from there somehow.