Custom Filter generator (top-level), which enforces a (sane) limit on the depth of the generated filters.

Custom generator for filters that correctly halves the state of the generators at each recursive step, per the QuickCheck documentation, in order not to run out of memory.

Generates an arbitrary JSValue. We do this via a function a not via arbitrary instance since that would require us to define an arbitrary for JSValue, which can be recursive, entering the usual problems with that; so we only generate the base types, not the recursive ones, and not JSNull, which we can't use in a RSNormal ResultEntry.

Generates a ResultEntry value.

Tests that serialisation/deserialisation of filters is idempotent.

Tests that filter regexes are serialised correctly.

Tests ResultStatus serialisation.

Tests FieldType serialisation.

Tests FieldDef serialisation.

Tests ResultEntry serialisation. Needed especially as this is done manually, and not via buildObject (different serialisation format).

Tests FieldDef serialisation. We use a made-up maximum limit of 20 for the generator, since otherwise the lists become too long and we don't care so much about list length but rather structure.

Tests ItemType serialisation.

Tests basic cases of filter parsing, including legacy ones.