move the delete tests from CRUDTest into sql/test_delete.py (see #2630)

1 files changed, 86 insertions, 0 deletions

diff --git a/test/sql/test_delete.py b/test/sql/test_delete.py
new file mode 100644
index 000000000..a8506fe86
--- /dev/null
+++ b/test/sql/test_delete.py
@@ -0,0 +1,86 @@
+#! coding:utf-8
+
+from sqlalchemy import Column, Integer, String, Table, delete, select
+from sqlalchemy.dialects import mysql
+from sqlalchemy.testing import AssertsCompiledSQL, fixtures
+
+
+class _DeleteTestBase(object):
+    @classmethod
+    def define_tables(cls, metadata):
+        Table('mytable', metadata,
+              Column('myid', Integer),
+              Column('name', String),
+              Column('description', String))
+        Table('myothertable', metadata,
+              Column('otherid', Integer),
+              Column('othername', String))
+
+
+class DeleteTest(_DeleteTestBase, fixtures.TablesTest, AssertsCompiledSQL):
+    __dialect__ = 'default'
+
+    def test_delete(self):
+        table1 = self.tables.mytable
+
+        self.assert_compile(
+            delete(table1, table1.c.myid == 7),
+            'DELETE FROM mytable WHERE mytable.myid = :myid_1')
+
+        self.assert_compile(
+            table1.delete().where(table1.c.myid == 7),
+            'DELETE FROM mytable WHERE mytable.myid = :myid_1')
+
+        self.assert_compile(
+            table1.delete().
+                where(table1.c.myid == 7).
+                where(table1.c.name == 'somename'),
+            'DELETE FROM mytable '
+            'WHERE mytable.myid = :myid_1 '
+            'AND mytable.name = :name_1')
+
+    def test_prefix_with(self):
+        table1 = self.tables.mytable
+
+        stmt = table1.delete().\
+            prefix_with('A', 'B', dialect='mysql').\
+            prefix_with('C', 'D')
+
+        self.assert_compile(stmt,
+            'DELETE C D FROM mytable')
+
+        self.assert_compile(stmt,
+            'DELETE A B C D FROM mytable',
+            dialect=mysql.dialect())
+
+    def test_alias(self):
+        table1 = self.tables.mytable
+
+        talias1 = table1.alias('t1')
+        stmt = delete(talias1).where(talias1.c.myid == 7)
+
+        self.assert_compile(stmt,
+            'DELETE FROM mytable AS t1 WHERE t1.myid = :myid_1')
+
+    def test_correlated(self):
+        table1, table2 = self.tables.mytable, self.tables.myothertable
+
+        # test a non-correlated WHERE clause
+        s = select([table2.c.othername], table2.c.otherid == 7)
+        self.assert_compile(delete(table1, table1.c.name == s),
+            'DELETE FROM mytable '
+            'WHERE mytable.name = ('
+                'SELECT myothertable.othername '
+                'FROM myothertable '
+                'WHERE myothertable.otherid = :otherid_1'
+            ')')
+
+        # test one that is actually correlated...
+        s = select([table2.c.othername], table2.c.otherid == table1.c.myid)
+        self.assert_compile(table1.delete(table1.c.name == s),
+            'DELETE FROM mytable '
+            'WHERE mytable.name = ('
+                'SELECT myothertable.othername '
+                'FROM myothertable '
+                'WHERE myothertable.otherid = mytable.myid'
+            ')')