def METHOD_NAME(self):
    op = core.CreateOperator(
        'SparseToDenseMask',
        ['indices', 'values', 'default'],
        ['output'],
        mask=[1, 2, 6])
    workspace.FeedBlob('indices', np.array([2, 4, 6], dtype=np.int32))
    workspace.FeedBlob('values', np.array([1, 2, 3], dtype=np.float))
    workspace.FeedBlob('default', np.array(-1, dtype=np.float))
    workspace.RunOperatorOnce(op)
    output = workspace.FetchBlob('output')
    expected = np.array([-1, 1, 3], dtype=np.float)
    self.assertEqual(output.shape, expected.shape)
    np.testing.assert_array_equal(output, expected)