py/objstr: Raise an exception for wrong type on RHS of str binary op.

The main case to catch is invalid types for the containment operator, of
the form str.__contains__(non-str).

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/basics/containment.py b/tests/basics/containment.py
index bae3661131..4c94a9bae4 100644
--- a/tests/basics/containment.py
+++ b/tests/basics/containment.py
@@ -16,6 +16,17 @@ for needle in [haystack[:i+1] for i in range(len(haystack))]:
     print(haystack, "in", needle, "::", haystack in needle)
     print(haystack, "not in", needle, "::", haystack not in needle)
 
+# containment of bytes/ints in bytes
+print(b'' in b'123')
+print(b'0' in b'123', b'1' in b'123')
+print(48 in b'123', 49 in b'123')
+
+# containment of int in str is an error
+try:
+    1 in '123'
+except TypeError:
+    print('TypeError')
+
 # until here, the tests would work without the 'second attempt' iteration thing.
 
 for i in 1, 2: