runner.warmUpRuns = 5
        runner.runs = 15
        runner.addBuildMutator { invocationSettings ->
            new BuildMutator() {
                @Override
                void afterBuild(BuildContext context, Throwable error) {
                    cleanupCache(invocationSettings.gradleUserHome)
                }

                private void cleanupCache(File userHomeDir) {

        executer.beforeExecute {
            idsFile.delete()
        }
    }

    private TestFile getIdsFile() {
        testDir.testDirectory.file("ids.json")
    }

    @Override
    void afterBuild() {
        Map<String, Map<String, String>> idsMap = idsFile.readLines()
            .collect { line -> new JsonSlurper().parse(new StringReader(line)) as Map<String, Map<String, String>> }