select/run test by test item using command line

Hi,

We solved this issue by using the following Gradle/Groovy-based code, that updates the TC12 project to enable only the wanted test items to run:

    def patchMdsFile(Project project, File mdsFile) {
        def testItemToEnable = project.properties.testItem
        if (!testItemToEnable)
            throw new GradleException('Please set the `testItem` parameter (string containing the name of the test item to enable).')
        project.logger.lifecycle("Enabling test item ${testItemToEnable} in ${mdsFile}...")

        def mdsRoot = new XmlParser(false, false, true).parse(mdsFile)

        def projectVersion = VersionNumber.parse(mdsRoot.@version.toString())
        project.logger.info("Detected project version ${projectVersion}")

        if (projectVersion < VersionNumber.parse('12.0.0'))
            throw new GradleException("The project file uses an unsupported TestComplete version (${projectVersion}). Please upgrade your project to version 12 or above.")

        mdsRoot.testItems.children.testItem.each {
            def isEnabled = it.@name == testItemToEnable
            project.logger.info("Test item '${it.@name}' enabled flag: ${isEnabled}")

            it.@enabled = isEnabled
        }

        mdsFile.write(XmlUtil.serialize(mdsRoot))
    }