Add basic test for GpuAllocEmpty

theano/sandbox/gpuarray/tests/test_basic_ops.py

@@ -40,6 +40,7 @@ from ..type import (GpuArrayType,
 from ..basic_ops import (
     host_from_gpu, gpu_from_host,
     gpu_alloc, GpuAlloc,
+    GpuAllocEmpty,
     gpu_from_cuda,
     cuda_from_gpu, HostFromGpu,
     GpuContiguous,
@@ -309,6 +310,25 @@ class TestAlloc(test_basic.TestAlloc):
     allocs = [GpuAlloc(), GpuAlloc(), T.Alloc()]
 
 
+def test_alloc_empty():
+    for dt in ['float32', 'int8']:
+        f = theano.function([], GpuAllocEmpty(dt)(2, 3))
+        assert len(f.maker.fgraph.apply_nodes) == 1
+        out = f()
+        assert out.shape == (2, 3)
+        assert out.dtype == dt
+
+    f = theano.function([], [GpuAllocEmpty('uint64')(3, 2),
+                             GpuAllocEmpty('uint64')(3, 2)])
+    out = f()
+    assert out[0].shape == (3, 2)
+    assert out[0].dtype == 'uint64'
+    assert out[1].shape == (3, 2)
+    assert out[1].dtype == 'uint64'
+    assert len([node for node in f.maker.fgraph.apply_nodes
+                if isinstance(node.op, GpuAllocEmpty)]) == 1
+
+
 def test_shape():
     x = GpuArrayType(dtype='float32', broadcastable=[False, False, False])()
     v = gpuarray.zeros((3, 4, 5), dtype='float32')