[dak/master] Add new TimestampTestCase.

[Torsten Werner <twerner@debian.org>]

* Add triggers to test database.
* Add test case for columns created and modified.

Signed-off-by: Torsten Werner <twerner@debian.org>
---
 tests/db_test.py           |   43 +++++++++++++++++++++++++++++++++-
 tests/dbtest_timestamps.py |   56 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 98 insertions(+), 1 deletions(-)
 create mode 100755 tests/dbtest_timestamps.py

diff --git a/tests/db_test.py b/tests/db_test.py
index cdae54a..d95f0cb 100644
--- a/tests/db_test.py
+++ b/tests/db_test.py
@@ -5,6 +5,7 @@ from daklib.dbconn import DBConn
 
 from sqlalchemy import create_engine, __version__
 from sqlalchemy.exc import SADeprecationWarning
+from sqlalchemy.schema import DDL
 
 import pickle
 import warnings
@@ -14,7 +15,35 @@ warnings.filterwarnings('ignore', \
     "The SQLAlchemy PostgreSQL dialect has been renamed from 'postgres' to 'postgresql'.*", \
     SADeprecationWarning)
 
+all_tables = ['architecture', 'archive', 'bin_associations', 'bin_contents',
+    'binaries', 'binary_acl', 'binary_acl_map', 'build_queue', 'build_queue_files',
+    'changes', 'changes_pending_binaries', 'changes_pending_files',
+    'changes_pending_files_map', 'changes_pending_source',
+    'changes_pending_source_files', 'changes_pool_files', 'component', 'config',
+    'dsc_files', 'files', 'fingerprint', 'keyring_acl_map', 'keyrings', 'location',
+    'maintainer', 'new_comments', 'override', 'override_type', 'policy_queue',
+    'priority', 'section', 'source', 'source_acl', 'src_associations',
+    'src_format', 'src_uploaders', 'suite', 'suite_architectures',
+    'suite_build_queue_copy', 'suite_src_formats', 'uid', 'upload_blocks']
+
+drop_plpgsql = "DROP LANGUAGE IF EXISTS plpgsql CASCADE"
+create_plpgsql = "CREATE LANGUAGE plpgsql"
+create_function = """CREATE OR REPLACE FUNCTION tfunc_set_modified() RETURNS trigger AS $$
+    BEGIN NEW.modified = now(); return NEW; END;
+    $$ LANGUAGE 'plpgsql'"""
+create_trigger = """CREATE TRIGGER modified_%s BEFORE UPDATE ON %s
+    FOR EACH ROW EXECUTE PROCEDURE tfunc_set_modified()"""
+
 class DBDakTestCase(DakTestCase):
+    def execute(self, statement):
+        DDL(statement).execute(self.metadata.bind)
+
+    def create_all_triggers(self):
+        for statement in (drop_plpgsql, create_plpgsql, create_function):
+            self.execute(statement)
+        for table in all_tables:
+            self.execute(create_trigger % (table, table))
+
     def setUp(self):
         cnf = Config()
         if cnf["DB::Name"] in ('backports', 'obscurity', 'projectb'):
@@ -39,9 +68,21 @@ class DBDakTestCase(DakTestCase):
         pickle_file.close()
         self.metadata.bind = create_engine(connstr)
         self.metadata.create_all()
+        self.create_all_triggers()
         self.session = DBConn().session()
 
+    def classes_to_clean(self):
+        """
+        The function classes_to_clean() returns a list of classes. All objects
+        of each class will be deleted from the database in tearDown(). This
+        function should be overridden in derived test cases as needed.
+        """
+        return ()
+
     def tearDown(self):
-        self.session.close()
+        self.session.rollback()
+        for class_ in self.classes_to_clean():
+            self.session.query(class_).delete()
+        self.session.commit()
         #self.metadata.drop_all()
 
diff --git a/tests/dbtest_timestamps.py b/tests/dbtest_timestamps.py
new file mode 100755
index 0000000..ff19d7d
--- /dev/null
+++ b/tests/dbtest_timestamps.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python
+
+from db_test import DBDakTestCase
+
+from daklib.dbconn import DBConn, Uid
+
+import time
+import unittest
+
+class TimestampTestCase(DBDakTestCase):
+    """
+    TimestampTestCase checks that the timestamps created and modified are
+    working correctly.
+
+    TODO: Should we check all tables?
+    """
+
+    def now(self):
+        local_session = DBConn().session()
+        query = local_session.query('now').from_statement('select now() as now')
+        local_session.close()
+        return query.one().now
+
+    def sleep(self):
+        time.sleep(0.001)
+
+    def test_timestamps(self):
+        timestamp01 = self.now()
+        self.sleep()
+        uid = Uid(uid = 'ftp-master@debian.org')
+        self.session.add(uid)
+        self.session.commit()
+        created01 = uid.created
+        modified01 = uid.modified
+        self.sleep()
+        timestamp02 = self.now()
+        self.assertTrue(timestamp01 < created01)
+        self.assertTrue(timestamp01 < modified01)
+        self.assertTrue(created01 < timestamp02)
+        self.assertTrue(modified01 < timestamp02)
+        self.sleep()
+        uid.name = 'ftp team'
+        self.session.commit()
+        created02 = uid.created
+        modified02 = uid.modified
+        self.assertEqual(created01, created02)
+        self.assertTrue(modified01 < modified02)
+        self.sleep()
+        timestamp03 = self.now()
+        self.assertTrue(modified02 < timestamp03)
+
+    def classes_to_clean(self):
+        return (Uid,)
+
+if __name__ == '__main__':
+    unittest.main()
-- 
1.5.6.5