From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Fri, 31 May 2013 00:26:45 +0000 (-0400)
Subject: add a test for the exception we want to raise here
X-Git-Tag: rel_0_9_0b1~304^2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1cc6494802b1a605f3966449079e7c4467eddce5;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

add a test for the exception we want to raise here
---

diff --git a/test/orm/test_froms.py b/test/orm/test_froms.py
index 2bc9383682..1a972d9656 100644
--- a/test/orm/test_froms.py
+++ b/test/orm/test_froms.py
@@ -438,6 +438,18 @@ class ColumnAccessTest(QueryTest, AssertsCompiledSQL):
             "users) AS anon_1 WHERE anon_1.name = :name_1"
         )
 
+    def test_select_entity_from_no_entities(self):
+        User = self.classes.User
+        sess = create_session()
+
+        q = sess.query(User)
+        assert_raises_message(
+            sa.exc.ArgumentError,
+            r"A selectable \(FromClause\) instance is "
+            "expected when the base alias is being set",
+            sess.query(User).select_entity_from, User
+        )
+
     def test_select_from_no_aliasing(self):
         User = self.classes.User
         sess = create_session()