Update tests to use async better, no shared server

tests/testethcalls.nim

@@ -1,48 +1,76 @@
 import ../ rpcclient, ../ rpcserver
 import unittest, asyncdispatch, json, tables
+import stint, ethtypes, ethprocs, stintjson
 
 from os import getCurrentDir, DirSep
 from strutils import rsplit
 template sourceDir: string = currentSourcePath.rsplit(DirSep, 1)[0]
 
-var srv = sharedRpcServer()
-srv.address = "localhost"
-srv.port = Port(8546)
+var
+  server = newRpcServer()
+  client = newRpcClient()
 
-# importing ethprocs creates the server rpc calls
-import stint, ethtypes, ethprocs, stintjson
-# generate all client ethereum rpc calls
+## Generate Ethereum server RPCs
+server.addEthRpcs()
+
+## Generate client convenience marshalling wrappers from forward declarations
 createRpcSigs(sourceDir & DirSep & "ethcallsigs.nim")
 
-srv.rpc("rpc.uint256param") do(i: UInt256):
+## Create custom RPC with StUint input parameter
+server.rpc("rpc.uint256param") do(i: UInt256):
   let r = i + 1.stUint(256)
   result = %r
-  
-srv.rpc("rpc.testreturnuint256") do() -> UInt256:
+
+## Create custom RPC with StUInt return parameter
+server.rpc("rpc.testreturnuint256") do() -> UInt256:
   let r: UInt256 = "0x1234567890abcdef".parse(UInt256, 16)
   return r
 
-asyncCheck srv.serve
+proc testLocalCalls: Future[seq[JsonNode]] =
+  ## Call RPCs created with `rpc` locally.
+  ## This simply demonstrates async calls of the procs generated by the `rpc` macro.
+  var
+    uint256Param =  rpcUInt256Param(%[%"0x1234567890"])
+    returnUint256 = rpcTestReturnUInt256(%[])
+  result = all(uint256Param, returnUint256)
 
-suite "Ethereum RPCs":
-  proc main {.async.} =
-    var client = newRpcClient()
-    await client.connect("localhost", Port(8546))
+proc testRemoteUInt256: Future[seq[Response]] =
+  ## Call function remotely on server, testing `stint` types
+  var
+    uint256Param =  client.call("rpc.uint256param", %[%"0x1234567890"])
+    returnUint256 = client.call("rpc.testreturnuint256", %[])
+  result = all(uint256Param, returnUint256)
 
-    test "UInt256 param":
-      let r = waitFor rpcUInt256Param(%[%"0x1234567890"])
-      check r == %"0x1234567891"
+proc testSigCalls: Future[seq[string]] =
+  ## Remote call using proc generated from signatures in `ethcallsigs.nim`
+  var
+    version = client.web3_clientVersion()
+    sha3 = client.web3_sha3("0x68656c6c6f20776f726c64")
+  result = all(version, sha3)
 
-    test "Return UInt256":
-      let r = waitFor rpcTestReturnUInt256(%[])
-      check r == %"0x1234567890abcdef"
+server.address = "localhost"
+server.port = Port(8546)
+asyncCheck server.serve
+waitFor client.connect("localhost", Port(8546))
 
-    test "Version":
-      var
-        response = waitFor client.web3_clientVersion()
-      check response == "Nimbus-RPC-Test"
-    test "SHA3":
-      var response = waitFor client.web3_sha3("0x68656c6c6f20776f726c64")
-      check response == "0x47173285A8D7341E5E972FC677286384F802F8EF42A5EC5F03BBFA254CB01FAD"
 
-  waitFor main()
+suite "Local calls":
+  let localResults = testLocalCalls().waitFor
+  test "UInt256 param local":
+    check localResults[0] == %"0x1234567891"
+  test "Return UInt256 local":
+    check localResults[1] == %"0x1234567890abcdef"
+
+suite "Remote calls":
+  let remoteResults = testRemoteUInt256().waitFor
+  test "UInt256 param":
+    check remoteResults[0].result == %"0x1234567891"
+  test "Return UInt256":
+    check remoteResults[1].result == %"0x1234567890abcdef"
+
+suite "Generated from signatures":
+  let sigResults = testSigCalls().waitFor
+  test "Version":
+    check sigResults[0] == "Nimbus-RPC-Test"
+  test "SHA3":
+    check sigResults[1] == "0x47173285A8D7341E5E972FC677286384F802F8EF42A5EC5F03BBFA254CB01FAD"

tests/testserverclient.nim

@@ -1,28 +1,20 @@
 import  ../ rpcclient, ../ rpcserver
-import unittest, asyncdispatch, json
+import unittest, json
 
 var srv = newRpcServer()
 srv.address = "localhost"
 srv.port = Port(8545)
+var client = newRpcClient()
 
-proc makeProc(server: RpcServer) =
-  server.rpc("myProc") do(input: string, data: array[0..3, int]):
-    result = %("Hello " & input & " data: " & $data)
+# Create RPC on server
+srv.rpc("myProc") do(input: string, data: array[0..3, int]):
+  result = %("Hello " & input & " data: " & $data)
 
 asyncCheck srv.serve
+waitFor client.connect("localhost", Port(8545))
 
-srv.makeProc
-
+# TODO: When an error occurs during a test, stop the server
 suite "Server/Client RPC":
-  proc main {.async.} =
-    var client = newRpcClient()
-    await client.connect("localhost", Port(8545))
-
-    test "Custom RPC":
-      # Custom async RPC call
-      var response = waitFor client.call("myProc", %[%"abc", %[1, 2, 3, 4]])
-      check response.result.getStr == "Hello abc data: [1, 2, 3, 4]"
-
-  # TODO: When an error occurs during a test, stop the server
-  asyncCheck main()
-  
+  test "Custom RPC":
+    var r = waitFor client.call("myProc", %[%"abc", %[1, 2, 3, 4]])
+    check r.result.getStr == "Hello abc data: [1, 2, 3, 4]"