Checks that original can be created on the database.

Checks that original can be updated with updates, and the result should be a shallow merge of original into updates.

Generate as suitable update map with update-generator.

Returns a generator for the given spec. Optional second argument can be used to override generators for the items in the spec, and should be a map from field names to generators.

Defines a property that tests whether instances of a given spec name can be created, updated, and sent to and from the database.

Returns a spec instance “subset” (intended to be smaller than generating an instance of spec with instance-generator) suitable to use as an argument to assoc!.