>     MergingStateStore .trans(v1, p, cb(v2, r, c)) should apply p to v1 to receive v2
>   ․ MergingStateStore .trans(v1, p, cb(v2, r, c)) should apply p to v1 to receive v2
>     MergingStateStore .merge(v1, v2, cb(err, vm, c)) should return version vm which is a merge of both versions v1 and v2
>   ․ MergingStateStore .merge(v1, v2, cb(err, vm, c)) should return version vm which is a merge of both versions v1 and v2
>     MergingStateStore .merge(v1, v2, cb(err, vm, c)) should record the merge so that further merges would work
>   ․ MergingStateStore .merge(v1, v2, cb(err, vm, c)) should record the merge so that further merges would work
249c255
<   123 passing (6s)
---
>   126 passing (2s)