add test for github issue #22

Author: William Ballenthin

tests/data/highaddr/highaddr.idb

@@ -0,0 +1,17 @@
+import os.path
+
+import idb
+
+
+def test_issue22():
+    '''
+    demonstrate that functions found at addresses with the high bit set are no problem.
+    see github issue #22 for the backstory.
+    '''
+    cd = os.path.dirname(__file__)
+    idbpath = os.path.join(cd, 'data', 'highaddr', 'highaddr.idb')
+
+    with idb.from_file(idbpath) as db:
+        api = idb.IDAPython(db)
+        assert len(api.idautils.Functions()) == 1
+        assert api.idautils.Functions()[0] == 0xF7FFFFFF