Remove the transaction pin

CHANGES.txt

@@ -8,8 +8,6 @@ Changes
 
 - Add support for Python 3.4 up to 3.6.
 
-- Require transaction >= 1.6.0.
-
 
 0.7.7 (2016-06-23)
 ------------------

setup.py

@@ -41,7 +41,7 @@
     install_requires=[
         'setuptools',
         'SQLAlchemy>=0.5.1',
-        'transaction>=1.6.0',
+        'transaction',
         'zope.interface>=3.6.0',
     ],
     extras_require={'test': tests_require},

src/zope/sqlalchemy/tests.py

@@ -43,6 +43,7 @@ def b(s):
         return s
 
 import os
+import pkg_resources
 import re
 import unittest
 import transaction
@@ -153,6 +154,8 @@ def connect(dbapi_connection, connection_record):
 test_one = sa.Table('test_one', bound_metadata1, sa.Column('id', sa.Integer, primary_key=True))
 test_two = sa.Table('test_two', bound_metadata2, sa.Column('id', sa.Integer, primary_key=True))
 
+transaction_version = pkg_resources.get_distribution('transaction').parsed_version
+
 
 class TestOne(SimpleModel):
     pass
@@ -339,10 +342,15 @@ def testTransactionJoining(self):
             "Not joined transaction")
         transaction.abort()
         conn = Session().connection()
-        self.assertEqual(
-            [r for r in t._resources if isinstance(r, tx.SessionDataManager)],
-            [],
-            "Not joined transaction")
+        if transaction_version < pkg_resources.parse_version('1.6.0'):
+            self.assertTrue(
+                [r for r in t._resources if isinstance(r, tx.SessionDataManager)],
+                "Not joined transaction")
+        else:
+            self.assertEqual(
+                [r for r in t._resources if isinstance(r, tx.SessionDataManager)],
+                [],
+                "Not joined transaction")
 
     def testTransactionJoiningUsingRegister(self):
         transaction.abort()  # clean slate
@@ -358,10 +366,15 @@ def testTransactionJoiningUsingRegister(self):
             "Not joined transaction")
         transaction.abort()
         conn = EventSession().connection()
-        self.assertEqual(
-            [r for r in t._resources if isinstance(r, tx.SessionDataManager)],
-            [],
-            "Not joined transaction")
+        if transaction_version < pkg_resources.parse_version('1.6.0'):
+            self.assertTrue(
+                [r for r in t._resources if isinstance(r, tx.SessionDataManager)],
+                "Not joined transaction")
+        else:
+            self.assertEqual(
+                [r for r in t._resources if isinstance(r, tx.SessionDataManager)],
+                [],
+                "Not joined transaction")
 
     def testSavepoint(self):
         use_savepoint = not engine.url.drivername in tx.NO_SAVEPOINT_SUPPORT