tests/basics: Add test constructing a set from a non-trivial expression.

dpgeorge · dpgeorge · commit 17b4509564f7 · 2016-09-30T15:00:15.000+10:00
diff --git a/tests/basics/set1.py b/tests/basics/set1.py
@@ -6,6 +6,10 @@
 s = {3, 4, 3, 1}
 print(sorted(s))
 
+# expression in constructor
+s = {1 + len(s)}
+print(s)
+
 # Sets are not hashable
 try:
     {s: 1}
