[database] added test labels for CASIA-SURF (and corresponding tests)

bob/pad/face/database/casiasurf.py

@@ -175,8 +175,10 @@ class CasiaSurfPadDatabase(PadDatabase):
             lowlevel_purposes.append('attack') 
           
           # for eval
+          if 'test' in groups and 'real' in purposes:
+            lowlevel_purposes.append('real') 
           if 'test' in groups and 'attack' in purposes:
-            lowlevel_purposes.append('unknown')
+            lowlevel_purposes.append('attack') 
 
         samples = self.db.objects(groups=groups, purposes=lowlevel_purposes, **kwargs)
         samples = [CasiaSurfPadFile(s, stream_type=protocol) for s in samples]

bob/pad/face/test/test_databases.py

@@ -224,7 +224,9 @@ def test_casiasurf():
         assert len(casiasurf.objects(groups=('dev',), purposes=('real',))) == 2994
         assert len(casiasurf.objects(groups=('dev',), purposes=('attack',))) == 6614
         assert len(casiasurf.objects(groups=('dev',), purposes=('real','attack'))) == 9608
-        assert len(casiasurf.objects(groups=('eval',), purposes=('attack',))) == 57710
+        assert len(casiasurf.objects(groups=('eval',), purposes=('real',))) == 17458 
+        assert len(casiasurf.objects(groups=('eval',), purposes=('attack',))) == 40252
+        assert len(casiasurf.objects(groups=('eval',), purposes=('real','attack'))) == 57710
 
     except IOError as e:
         raise SkipTest(