<     DummyObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
<   ․ DummyObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
---
>     DummyObjectStore .trans(v, p, u) -> {v, r, eff} should throw an exception in case of a transformation that results in null
>   ․ DummyObjectStore .trans(v, p, u) -> {v, r, eff} should throw an exception in case of a transformation that results in null
210,211c210,211
<     SimpleObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
<   ․ SimpleObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
---
>     SimpleObjectStore .trans(v, p, u) -> {v, r, eff} should throw an exception in case of a transformation that results in null
>   ․ SimpleObjectStore .trans(v, p, u) -> {v, r, eff} should throw an exception in case of a transformation that results in null
249c249
<   123 passing (402ms)
---
>   123 passing (382ms)