Failing test stubs, raise on null array

python/arrow/array.pyx

@@ -95,9 +95,15 @@ cdef dict _array_classes = {
 }
 
 cdef object box_arrow_array(const shared_ptr[CArray]& sp_array):
-    cdef LogicalType type = sp_array.get().type().get().type
+    if sp_array.get() == NULL:
+        raise ValueError('Array was NULL')
 
-    cdef Array arr = _array_classes[type]()
+    cdef CDataType* data_type = sp_array.get().type().get()
+
+    if data_type == NULL:
+        raise ValueError('Array data type was NULL')
+
+    cdef Array arr = _array_classes[data_type.type]()
     arr.init(sp_array)
     return arr
 

python/arrow/tests/test_convert_builtin.py

@@ -21,5 +21,19 @@
 
 class TestConvertList(unittest.TestCase):
 
-    def test_list_convert(self):
+    def test_boolean(self):
+        pass
+
+    def test_integer(self):
+        arr = arrow.from_list([1, 2, 3])
+        assert len(arr) == 3
+        assert arr.type == arrow.int64()
+
+    def test_double(self):
+        pass
+
+    def test_string(self):
+        pass
+
+    def test_list_of_int(self):
         pass