[conduit: 69/138] Easy way to test if 2 datatypes are compatible

[John Carr <johncarr src gnome org>]

commit c067013b12bfc2c8d22f671504fa316fea49ebe9
Author: John Carr <john carr unrouted co uk>
Date:   Sun May 3 04:15:49 2009 -0700

    Easy way to test if 2 datatypes are compatible
---
 test/soup/data/__init__.py  |    5 +++++
 test/soup/test_datatypes.py |    4 ++++
 2 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/test/soup/data/__init__.py b/test/soup/data/__init__.py
index 0d70ae4..d75fab7 100644
--- a/test/soup/data/__init__.py
+++ b/test/soup/data/__init__.py
@@ -64,6 +64,11 @@ class DataWrapper(object):
             tovisit.extend(n.__bases__)
             yield (cls.get_datatype(), n, cls)
 
+    @classmethod
+    def is_compatible(cls, datatype):
+        compatible = list(cls.get_compatible_datatypes())
+        return datatype in compatible
+
 def load_modules():
     basepath = os.path.dirname(__file__)
     for root, dirs, files in os.walk(basepath):
diff --git a/test/soup/test_datatypes.py b/test/soup/test_datatypes.py
index 9beb6a9..467bbd7 100644
--- a/test/soup/test_datatypes.py
+++ b/test/soup/test_datatypes.py
@@ -41,6 +41,10 @@ def make_testcase(wrp):
             others = list(self.wrapper.get_compatible_datatypes())
             assert len(others) > 1
 
+        def test_is_compatible(self):
+            """ Should be compatible with self """
+            assert self.wrapper.is_compatible(self.wrapper.get_datatype())
+
     return TestDatatype