1 files changed, 83 insertions, 0 deletions
diff --git a/lib/sqlalchemy/testing/suite/test_select.py b/lib/sqlalchemy/testing/suite/test_select.py
new file mode 100644
index 000000000..b040c8f25
--- /dev/null
+++ b/lib/sqlalchemy/testing/suite/test_select.py
@@ -0,0 +1,83 @@
+from .. import fixtures, config
+from ..assertions import eq_
+
+from sqlalchemy import Integer, String, select, func
+
+from ..schema import Table, Column
+
+
+class OrderByLabelTest(fixtures.TablesTest):
+    """Test the dialect sends appropriate ORDER BY expressions when
+    labels are used.
+
+    This essentially exercises the "supports_simple_order_by_label"
+    setting.
+
+    """
+    @classmethod
+    def define_tables(cls, metadata):
+        Table("some_table", metadata,
+            Column('id', Integer, primary_key=True),
+            Column('x', Integer),
+            Column('y', Integer),
+            Column('q', String(50)),
+            Column('p', String(50))
+            )
+
+    @classmethod
+    def insert_data(cls):
+        config.db.execute(
+            cls.tables.some_table.insert(),
+            [
+                {"id": 1, "x": 1, "y": 2, "q": "q1", "p": "p3"},
+                {"id": 2, "x": 2, "y": 3, "q": "q2", "p": "p2"},
+                {"id": 3, "x": 3, "y": 4, "q": "q3", "p": "p1"},
+            ]
+        )
+
+    def _assert_result(self, select, result):
+        eq_(
+            config.db.execute(select).fetchall(),
+            result
+        )
+
+    def test_plain(self):
+        table = self.tables.some_table
+        lx = table.c.x.label('lx')
+        self._assert_result(
+            select([lx]).order_by(lx),
+            [(1, ), (2, ), (3, )]
+        )
+
+    def test_composed_int(self):
+        table = self.tables.some_table
+        lx = (table.c.x + table.c.y).label('lx')
+        self._assert_result(
+            select([lx]).order_by(lx),
+            [(3, ), (5, ), (7, )]
+        )
+
+    def test_composed_multiple(self):
+        table = self.tables.some_table
+        lx = (table.c.x + table.c.y).label('lx')
+        ly = (func.lower(table.c.q) + table.c.p).label('ly')
+        self._assert_result(
+            select([lx, ly]).order_by(lx, ly.desc()),
+            [(3, u'q1p3'), (5, u'q2p2'), (7, u'q3p1')]
+        )
+
+    def test_plain_desc(self):
+        table = self.tables.some_table
+        lx = table.c.x.label('lx')
+        self._assert_result(
+            select([lx]).order_by(lx.desc()),
+            [(3, ), (2, ), (1, )]
+        )
+
+    def test_composed_int_desc(self):
+        table = self.tables.some_table
+        lx = (table.c.x + table.c.y).label('lx')
+        self._assert_result(
+            select([lx]).order_by(lx.desc()),
+            [(7, ), (5, ), (3, )]
+        )