extmod: Add test which demonstrates LITTLE_ENDIAN packing failure

9 years ago · 5a4a2b1db3
2 changed files with 6 additions and 0 deletions
--- a/tests/extmod/uctypes_sizeof.py
+++ b/tests/extmod/uctypes_sizeof.py
@ -6,6 +6,7 @@ desc = {
    # arr2 is array at offset 0, size 2, of structures defined recursively
    "arr2": (uctypes.ARRAY | 0, 2, {"b": uctypes.UINT8 | 0}),
    "arr3": (uctypes.ARRAY | 2, uctypes.UINT16 | 2),
+    "arr4": (uctypes.ARRAY | 0, 2, {"b": uctypes.UINT8 | 0, "w": uctypes.UINT16 | 1})
 }

 data = bytearray(b"01234567")
@ -24,3 +25,7 @@ try:
    print(uctypes.sizeof(S.arr3[0]))
 except TypeError:
    print("TypeError")
+
+print(uctypes.sizeof(S.arr4))
+assert uctypes.sizeof(S.arr4) == 6
+
--- a/tests/extmod/uctypes_sizeof.py.exp
+++ b/tests/extmod/uctypes_sizeof.py.exp
@ -2,3 +2,4 @@
 2
 4
 TypeError
+6