add second mem only tests

tests/datastore/testthreadproxyds2.nim

@@ -0,0 +1,53 @@
+import std/options
+import std/sequtils
+import std/os
+import std/cpuinfo
+import std/algorithm
+import std/importutils
+
+import pkg/asynctest
+import pkg/chronos
+import pkg/chronos/threadsync
+import pkg/stew/results
+import pkg/stew/byteutils
+import pkg/taskpools
+import pkg/questionable/results
+import pkg/chronicles
+
+import pkg/datastore/sql
+import pkg/datastore/fsds
+import pkg/datastore/memoryds
+import pkg/datastore/threads/threadproxyds {.all.}
+
+import ./dscommontests
+import ./querycommontests
+
+const NumThreads = 200 # IO threads aren't attached to CPU count
+
+proc testBasicMemory() =
+
+  suite "Test Basic ThreadDatastore with SQLite":
+
+    var
+      memStore: Datastore
+      ds: ThreadDatastore
+      taskPool: Taskpool
+      key = Key.init("/a/b").tryGet()
+      bytes = "some bytes".toBytes
+      otherBytes = "some other bytes".toBytes
+
+    setupAll:
+      memStore = MemoryDatastore.new()
+      taskPool = Taskpool.new(NumThreads)
+      ds = ThreadDatastore.new(memStore, tp = taskPool).tryGet()
+
+    teardownAll:
+      (await ds.close()).tryGet()
+      taskPool.shutdown()
+
+    basicStoreTests(ds, key, bytes, otherBytes)
+    GC_fullCollect()
+
+for i in 1..1000:
+  testBasicMemory()
+  GC_fullCollect()