Change load to use a global SchemaParser. Make structs settable as field

test/test_load.py

@@ -8,6 +8,14 @@ this_dir = os.path.dirname(__file__)
 def addressbook():
      return capnp.load(os.path.join(this_dir, 'addressbook.capnp'))
 
+@pytest.fixture
+def foo():
+     return capnp.load(os.path.join(this_dir, 'foo.capnp'))
+
+@pytest.fixture
+def bar():
+     return capnp.load(os.path.join(this_dir, 'bar.capnp'))
+
 def test_basic_load():
     capnp.load(os.path.join(this_dir, 'addressbook.capnp'))
 
@@ -17,3 +25,31 @@ def test_constants(addressbook):
 def test_classes(addressbook):
     assert addressbook.AddressBook
     assert addressbook.Person
+
+def test_import(foo, bar):
+    m = capnp.MallocMessageBuilder()
+    foo = m.initRoot(foo.Foo)
+    m2 = capnp.MallocMessageBuilder()
+    bar = m2.initRoot(bar.Bar)
+
+    foo.name = 'foo'
+    bar.foo = foo
+
+    assert bar.foo.name == 'foo'
+
+def test_failed_import():
+    s = capnp.SchemaParser()
+    s2 = capnp.SchemaParser()
+
+    foo = s.load(os.path.join(this_dir, 'foo.capnp'))
+    bar = s2.load(os.path.join(this_dir, 'bar.capnp'))
+
+    m = capnp.MallocMessageBuilder()
+    foo = m.initRoot(foo.Foo)
+    m2 = capnp.MallocMessageBuilder()
+    bar = m2.initRoot(bar.Bar)
+
+    foo.name = 'foo'
+
+    with pytest.raises(ValueError):
+        bar.foo = foo