Very basic starter test.

theano/sandbox/gpuarray/tests/test_basic_ops.py

+from nose.plugins.skip import SkipTest
+
+import numpy
+import theano.tensor as T
+
+import theano.sandbox.gpuarray
+if theano.sandbox.gpuarray.pygpu is None:
+    raise SkipTest("pygpu disabled")
+
+from theano.sandbox.gpuarray.type import GpuArrayType
+from theano.sandbox.gpuarray.basic_ops import (host_from_gpu, gpu_from_host)
+
+from pygpu import gpuarray
+
+def rand_gpuarray(shape, dtype):
+    return gpuarray.array(numpy.random.rand(*shape), dtype=dtype)
+
+def test_transfer():
+    a = T.fmatrix('a')
+    g = GpuArrayType(dtype='float32', broadcastable=(False, False))('g')
+    
+    av = numpy.asarray(numpy.random.rand(5, 4), dtype='float32')
+    gv = gpuarray.array(av, kind=g.type.kind, context=g.type.context)
+    
+    f = theano.function([a], gpu_from_host(a))
+    fv = f(av)
+    assert numpy.allclose(fv, gv)
+
+    f = theano.function([g], host_from_gpu(g))
+    fv = f(gv)
+    assert numpy.allclose(fv, av)