tests/basics: Add more set tests to improve coverage of py/objset.c.

tests/basics/set_binop.py

@@ -60,6 +60,12 @@ except TypeError:
     print('TypeError')
 
 # unsupported operator
+try:
+    set('abc') * set('abc')
+except TypeError:
+    print('TypeError')
+
+# unsupported operator with RHS not a set
 try:
     set('abc') * 2
 except TypeError:

tests/basics/set_isfooset.py

@@ -1,5 +1,6 @@
 sets = [set(), {1}, {1, 2, 3}, {3, 4, 5}, {5, 6, 7}]
+args = sets + [[1], [1, 2], [1, 2 ,3]]
 for i in sets:
-    for j in sets:
+    for j in args:
         print(i.issubset(j))
         print(i.issuperset(j))