get rid of null datastore

datastore/nullds.nim

@@ -1,47 +0,0 @@
-import pkg/chronos
-import pkg/questionable
-import pkg/questionable/results
-import pkg/upraises
-
-import ./datastore
-
-export datastore
-
-push: {.upraises: [].}
-
-type
-  NullDatastore* = ref object of Datastore
-
-proc new*(T: type NullDatastore): T =
-  T()
-
-method contains*(
-  self: NullDatastore,
-  key: Key): Future[?!bool] {.async, locks: "unknown".} =
-
-  return success false
-
-method delete*(
-  self: NullDatastore,
-  key: Key): Future[?!void] {.async, locks: "unknown".} =
-
-  return success()
-
-method get*(
-  self: NullDatastore,
-  key: Key): Future[?!(?seq[byte])] {.async, locks: "unknown".} =
-
-  return success seq[byte].none
-
-method put*(
-  self: NullDatastore,
-  key: Key,
-  data: seq[byte]): Future[?!void] {.async, locks: "unknown".} =
-
-  return success()
-
-iterator query*(
-  self: NullDatastore,
-  query: Query): Future[QueryResponse] =
-
-  discard

tests/datastore/testnullds.nim

@@ -1,43 +0,0 @@
-import std/options
-
-import pkg/asynctest/unittest2
-import pkg/chronos
-import pkg/stew/results
-
-import pkg/datastore/nullds
-
-suite "NullDatastore":
-  let
-    key = Key.init("a").get
-    ds = NullDatastore.new()
-
-  test "new":
-    check: not ds.isNil
-
-  test "put":
-    check: (await ds.put(key, @[1.byte])).isOk
-
-  test "delete":
-    check: (await ds.delete(key)).isOk
-
-  test "contains":
-    check:
-      (await ds.contains(key)).isOk
-      (await ds.contains(key)).get == false
-
-  test "get":
-    check:
-      (await ds.get(key)).isOk
-      (await ds.get(key)).get.isNone
-
-  test "query":
-    var
-      x = true
-
-    for n in ds.query(Query.init(key)):
-      # `iterator query` for NullDatastore never yields so the following lines
-      # are not run (else the test would hang)
-      x = false
-      discard (await n)
-
-    check: x