Harness.hs

{-# LANGUAGE DataKinds #-}
{-# LANGUAGE OverloadedLabels #-}
-- @generated by keiro-dsl 0.8.0.0 (language keiro-dsl 4) from aggregate Note; do not edit.
module Generated.ReplayDivergence.Note.Harness (harnessAssertions) where

import Generated.ReplayDivergence.Note.Domain
import Generated.ReplayDivergence.Note.Codec (encodeNoteEvent, parseNoteEvent, noteCodec)
import Generated.ReplayDivergence.Note.Transducer (noteTransducer)
import Keiki.Core (applyEventsEither, defaultValidationOptions, step, validateTransducer, (!))
import Keiro.Codec (eventType)

-- | (label, passed). A driver runs these and exits non-zero on any False,
-- naming the failing assertion. Filling a hole wrongly turns a specific
-- entry False; the scaffold cannot.
harnessAssertions :: [(String, Bool)]
harnessAssertions =
  [ ("validateTransducer is empty", null (validateTransducer defaultValidationOptions noteTransducer))
  , ("clock-free: spec samples no wall clock", True)
  , ("golden round-trip: NoteWritten", roundTrips sampleEventNoteWritten)
  , ("accepts WriteNote from NoteEmpty", acceptWriteNote)
  ]
  ++ forwardReplayWriteNote

roundTrips :: NoteEvent -> Bool
roundTrips e = parseNoteEvent (eventType noteCodec e) (encodeNoteEvent e) == Right e

sampleEventNoteWritten :: NoteEvent
sampleEventNoteWritten = (NoteWritten (NoteWrittenData "sample-noteText" "sample-echo"))

acceptWriteNote :: Bool
acceptWriteNote =
  case step noteTransducer (NoteEmpty, initialNoteRegs) ((WriteNote (WriteNoteData "sample-noteText" "sample-echo"))) of
    Just (v, _, _) -> v == NoteRecorded
    Nothing -> False

-- forward/replay equality (plan 147): cross the persisted codec boundary,
-- replay the emitted chain, and compare the final vertex and every register.
forwardReplayWriteNote :: [(String, Bool)]
forwardReplayWriteNote =
  case step noteTransducer (NoteEmpty, initialNoteRegs) ((WriteNote (WriteNoteData "sample-noteText" "sample-echo"))) of
    Nothing -> [(prefix <> "forward step accepted", False)]
    Just (forwardVertex, forwardRegs, emitted) ->
      case mapM (\event -> parseNoteEvent (eventType noteCodec event) (encodeNoteEvent event)) emitted of
        Left _ -> [(prefix <> "emitted chain decodes", False)]
        Right decodedEvents ->
          case applyEventsEither noteTransducer (NoteEmpty, initialNoteRegs) decodedEvents of
            Left _ -> [(prefix <> "replay succeeds", False)]
            Right (replayVertex, replayRegs) ->
              [ (prefix <> "final vertex", replayVertex == forwardVertex)
              , (prefix <> "register note", (replayRegs ! #note) == (forwardRegs ! #note))
              ]
  where
    prefix = "forward/replay equality: WriteNote from NoteEmpty -- "