Adding an RPC codegen test

tests/codegen/rpc/schema.json

@@ -0,0 +1,32 @@
+{
+  "services": {
+    "test_service": {
+      "procedures": {
+        "rpc_method": {
+          "input": {
+            "type": "object",
+            "properties": {
+              "data": {
+                "type": "string"
+              }
+            },
+            "required": ["data"]
+          },
+          "output": {
+            "type": "object",
+            "properties": {
+              "data": {
+                "type": "string"
+              }
+            },
+            "required": ["data"]
+          },
+          "errors": {
+            "not": {}
+          },
+          "type": "rpc"
+        }
+      }
+    }
+  }
+}

tests/codegen/test_rpc.py

@@ -0,0 +1,23 @@
+from datetime import timedelta
+
+import pytest
+
+from replit_river.client import Client
+from replit_river.codegen.client import schema_to_river_client_codegen
+from tests.common_handlers import basic_rpc_method
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("handlers", [{**basic_rpc_method}])
+async def test_foo(client: Client):
+    schema_to_river_client_codegen(
+        "tests/codegen/rpc/schema.json", "tests/codegen/dist/rpc", "RpcClient", True
+    )
+    from tests.codegen.dist.rpc import RpcClient
+
+    name = "feep"
+    _c = RpcClient(client)
+    res = await _c.test_service.rpc_method({
+        "data": name,
+    }, timedelta(seconds=5))
+    assert res.data == "Hello, feep!", f"Expected 'Hello, {name}!' received {res.data}"