Added test that loops through all legal modes and verifies they work.

theano/compile/tests/test_modes.py

+"""
+Test compilation modes
+"""
+from nose.plugins.skip import SkipTest
+
+import unittest
+import theano
+import numpy
+import random
+import numpy.random
+from theano.tests  import unittest_tools as utt
+
+
+class T_bunch_of_modes(unittest.TestCase):
+
+    def test1(self):
+        # this is a quick test after the LazyLinker branch merge
+        # to check that all the current modes can still be used.
+        linker_classes_involved = []
+        for modename in theano.config.__class__.__dict__['mode'].all:
+
+            x = T.matrix()
+            y = T.vector()
+            f = theano.function([x,y], x+y, mode=modename)
+            # test that it runs something
+            f([[1,2],[3,4]], [5, 6])
+            linker_classes_involved.append(f.maker.mode.linker.__class__)
+            print 'MODE:', modename, f.maker.mode.linker, 'stop'
+        # regression check:
+        # there should be
+        # - VM_Linker
+        # - OpWiseCLinker (FAST_RUN)
+        # - WrapLinker (PROFILE_MODE)
+        # - PerformLinker (FAST_COMPILE)
+        # - DebugMode's Linker  (DEBUG_MODE)
+        assert 5 == len(set(linker_classes_involved))
+
+if __name__ == '__main__':
+    unittest.main()

theano/tests/diverse_tests.py

@@ -65,6 +65,7 @@ class T_scipy(unittest.TestCase):
         for i in range(training_steps):
             pred, err = train(D[0], D[1])
 
+
 if __name__ == '__main__':
     unittest.main()