func newTestContext() (ctx *testContext, err error) {

        ctx = &testContext{}

        defer func() {
                if r := recover(); r != nil {
                        ctx.cleanUp()
                        ctx = nil
                        err = r.(error)
                }
        }()

        tmpRoot, e := ioutil.TempDir("/tmp", "ykeykeyTest")
        if e != nil {
                panic(errors.New("Creating temporary test root: " + e.Error()))
        }
        ctx.testRoot = tmpRoot