Show stderr for failed tests

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7

I wrote this, and it’s working for me. It only saves the last 100 lines of output. I’d love to see something like this get added to Gradle:

// If a test fails, print its stdout/stderr to the console.
project.test {
    def stdout = new LinkedList<String>()
    beforeTest { TestDescriptor td ->
        stdout.clear()
    }
    onOutput { TestDescriptor td, TestOutputEvent toe ->
        stdout.addAll(toe.getMessage().split('(?m)$'))
        while (stdout.size() > 100) {
            stdout.remove()
        }
    }
    afterTest { TestDescriptor td, TestResult tr ->
        if (tr.resultType == TestResult.ResultType.FAILURE && stdout.size() > 0) {
            println()
            println("${td.className}.${td.name} failed, output:")
            stdout.each { print(it) }
        }
    }
}