add test using real samples

tests/codex/slots/backends/testcircomcompat.nim

@@ -135,3 +135,74 @@ suite "Test Circom Compat Backend":
       proof = circom.prove(proofInput).tryGet
 
     check circom.verify(proof, publicInputs, verifyingKeyPtr[]).tryGet == false
+
+suite "Test Circom Compat Backend":
+  let
+    slotId = 3
+    samples = 5
+    blockSize = DefaultBlockSize
+    cellSize = DefaultCellSize
+    ecK = 2
+    ecM = 2
+    numDatasetBlocks = 8
+
+    r1cs = "tests/circuits/fixtures/proof_main.r1cs"
+    wasm = "tests/circuits/fixtures/proof_main.wasm"
+
+  var
+    store: BlockStore
+    manifest: Manifest
+    protected: Manifest
+    verifiable: Manifest
+    circom: CircomCompat
+    verifyingKeyPtr: ptr CircomKey
+    proofInput: ProofInput[Poseidon2Hash]
+    publicInputs: CircomInputs
+    challenge: array[32, byte]
+    builder: Poseidon2Builder
+    sampler: Poseidon2Sampler
+
+  setup:
+    let
+      repoDs = SQLiteDatastore.new(Memory).tryGet()
+      metaDs = SQLiteDatastore.new(Memory).tryGet()
+
+    store = RepoStore.new(repoDs, metaDs)
+
+    (manifest, protected, verifiable) =
+        await createVerifiableManifest(
+          store,
+          numDatasetBlocks,
+          ecK, ecM,
+          blockSize,
+          cellSize)
+
+    builder = Poseidon2Builder.new(store, verifiable).tryGet
+    sampler = Poseidon2Sampler.new(slotId, store, builder).tryGet
+
+    # circom = CircomCompat.init(r1cs, wasm, zkey)
+    circom = CircomCompat.init(r1cs, wasm)
+    verifyingKeyPtr = circom.getVerifyingKey().tryGet
+    challenge = 1234567.toF.toBytes.toArray32
+
+    proofInput = (await sampler.getProofInput(challenge, samples)).tryGet
+    publicInputs = proofInput.toPublicInputs.toCircomInputs
+
+  teardown:
+    publicInputs.releaseNimInputs()      # this is allocated by nim
+    verifyingKeyPtr.addr.releaseKey()    # this comes from the rust FFI
+    circom.release()                     # this comes from the rust FFI
+
+  test "Should verify with correct input":
+    var
+      proof = circom.prove(proofInput).tryGet
+
+    check circom.verify(proof, publicInputs, verifyingKeyPtr[]).tryGet
+
+  test "Should not verify with incorrect input":
+    proofInput.slotIndex = 1 # change slot index
+
+    let
+      proof = circom.prove(proofInput).tryGet
+
+    check circom.verify(proof, publicInputs, verifyingKeyPtr[]).tryGet == false