First working version of capability interfaces

test/test_capability.capnp

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+# Copyright (c) 2013, Kenton Varda <temporal@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this
+#    list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+@0xd508eefec2dc42b8;
+
+interface TestInterface {
+  foo @0 (i :UInt32, j :Bool) -> (x: Text);
+  bar @1 () -> ();
+  # baz @2 (s: TestAllTypes);
+}
+
+# interface TestExtends extends(TestInterface) {
+#   qux @0 ();
+#   corge @1 TestAllTypes -> ();
+#   grault @2 () -> TestAllTypes;
+# }
+
+# interface TestPipeline {
+#   getCap @0 (n: UInt32, inCap :TestInterface) -> (s: Text, outBox :Box);
+#   testPointers @1 (cap :TestInterface, obj :Object, list :List(TestInterface)) -> ();
+
+#   struct Box {
+#     cap @0 :TestInterface;
+#   }
+# }

test/test_capability.py

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+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')