func erasureSelfTest() {
	// Approx runtime ~1ms
	var testConfigs [][2]uint8
	for total := uint8(4); total < 16; total++ {
		for data := total / 2; data < total; data++ {
			parity := total - data
			testConfigs = append(testConfigs, [2]uint8{data, parity})
		}
	}
	got := make(map[[2]uint8]map[ErasureAlgo]uint64, len(testConfigs))
	// Copied from output of fmt.Printf("%#v", got) at the end.

	cfgGet := func(param string) string {
		return testKvs.Get(param)
	}

	if testConfig.provider != nil {
		t.Errorf("Empty config cannot have any provider!")
	}

	if err := testConfig.initializeProvider(cfgGet, http.DefaultTransport); err != nil {
		t.Error(err)
	}

	if testConfig.provider == nil {
		t.Errorf("keycloak provider must be initialized!")
	}