Static analsyis test for complex flow tests (filtering).

test/static_analysis/branches.py

@@ -0,0 +1,11 @@
+import random
+
+if random.choice([0, 1]):
+    x = ''
+else:
+    x = 1
+
+if x != 1:
+    x = x.upper()
+else:
+    pass