Changeset 4272

Timestamp:

Feb 21, 2007, 9:45:58 AM (18 years ago)

Author:

duncan

Message:

added test, looking at instances passed in.

File:

• anuga_core/source/anuga/caching/test_caching.py (modified) (2 diffs)

anuga_core/source/anuga/caching/test_caching.py

@@ -20 +20 @@
   return(B)
 
-
-
-
-
-
+class Dummy:
+  def __init__(self,value, another):
+    self.value = value
 
 class Test_Caching(unittest.TestCase):
@@ -300 +298 @@
 
 
+    def Will_fail_test_objects(self):
+      """
+      This test shows how instances can't be effectively cached.
+      myhash uses hash which uses id which uses the memory address. 
+      """
+      verbose = True
+      verbose = False
+
+      for i in range(2):
+        if verbose: print "clear cache"
+        a = cache(Dummy,'clear')     
+        if verbose: print "cache for first time"
+        a = cache(Dummy,args=(9,10) ,verbose=verbose)
+        hash_value = myhash(a)
+        #print "hash_value",hash_value 
+        if verbose: print "cache for second time"
+        a = cache(Dummy,args=(9,10) ,verbose=verbose)
+        #print "myhash(a)",myhash(a) 
+        assert hash_value == myhash(a)
+
+      
+