[unittest/python] update test_std_array.py

unittest/python/test_std_array.py

@@ -6,14 +6,30 @@ print(ints[0])
 print(ints[1])
 print(ints[2])
 
-_ints_slice = ints[1:2]
-assert len(_ints_slice) == 2, "Slice size should be 2, got %d" % len(_ints_slice)
-assert _ints_slice[0] == 1
-assert _ints_slice[1] == 2
+_ints_slice = ints[1:3]
+print("Printing slice...")
+for el in _ints_slice:
+    print(el)
 
-print(ints.tolist())
+ref = [1, 2, 3]
+assert len(ref[1:2]) == 1  # sanity check
+
+assert len(_ints_slice) == 2, "Slice size should be 1, got %d" % len(_ints_slice)
+assert _ints_slice[0] == 2
+assert _ints_slice[1] == 3
+
+# print(ints.tolist())
 
 vecs = std_array.get_arr_3_vecs()
-print(vecs[0])
-print(vecs[1])
-print(vecs[2])
+assert len(vecs) == 3
+# print(vecs[0])
+# print(vecs[1])
+# print(vecs[2])
+
+## Tests for the full-size slice
+
+v2 = vecs[:]
+assert isinstance(v2, std_array.StdVec_VectorXd)
+assert len(v2) == 3
+print(v2.tolist())
+print(v2[0])