# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1485211580 -3600
# Node ID 267efab8ae738c16a8a30b788aa640c5958acfa4
# Parent  8f44e9dcfe6a7c49c26e49fb16f4454f7b91a392
Expanded the test of get_using.

diff -r 8f44e9dcfe6a -r 267efab8ae73 tests/get_using.py
--- a/tests/get_using.py	Mon Jan 23 23:28:19 2017 +0100
+++ b/tests/get_using.py	Mon Jan 23 23:46:20 2017 +0100
@@ -3,17 +3,33 @@
         self.x = 123
 
     def f(self):
-        print self
         return self.x
 
+class D:
+    pass
+
 c = C()
 f = C.f
 fn = get_using(C.f, c)
 print fn                            # __main__.C.f
 print fn()                          # 123
+
 fn = get_using(C.f, C)
 print fn                            # __main__.C.f
 try:
     print fn()                      # fails
 except UnboundMethodInvocation:
     print "fn(): method is unbound"
+
+d = D()
+try:
+    fn = get_using(C.f, d)
+except TypeError:
+    print "get_using(C.f, d): d is not compatible with C"
+
+fn = get_using(c, C.f)
+print fn                            # <__main__.C instance>
+try:
+    print fn()                      # fails
+except TypeError:
+    print "fn(): object is not callable"