First working version of capability interfaces

test/test_capability.py

@@ -0,0 +1,30 @@
+import pytest
+import capnp
+import os
+
+this_dir = os.path.dirname(__file__)
+
+@pytest.fixture
+def capability():
+     return capnp.load(os.path.join(this_dir, 'test_capability.capnp'))
+
+class Server:
+    def foo(self, context):
+        context.results.x = str(context.params.i * 5 + 1)
+
+def test_basic_client(capability):
+    loop = capnp.EventLoop()
+
+    client = capability.TestInterface.new_client(Server(), loop)
+    
+    req = client.request('foo')
+    req.i = 5
+
+    remote = req.send()
+    remote = client.send('foo', i=10)
+    response = loop.wait_remote(remote)
+
+    # assert response.x == '26'
+
+    with pytest.raises(ValueError):
+        client.request('foo2')