tests: db_pool: test .clear() updates .current_size GH-139

tests/db_pool_test.py

@@ -453,6 +453,7 @@ class DBConnectionPool(DBTester):
 
 
 class DummyConnection(object):
+    def rollback(self):
         pass
 
 
@@ -505,8 +506,7 @@ class RawConnectionPool(DBConnectionPool):
             **self._auth)
 
 
-class TestRawConnectionPool(TestCase):
-    def test_issue_125(self):
+def test_raw_pool_issue_125():
     # pool = self.create_pool(min_size=3, max_size=5)
     pool = db_pool.RawConnectionPool(
         DummyDBModule(),
@@ -515,7 +515,8 @@ class TestRawConnectionPool(TestCase):
     conn = pool.get()
     pool.put(conn)
 
-    def test_custom_cleanup_ok(self):
+
+def test_raw_pool_custom_cleanup_ok():
     cleanup_mock = mock.Mock()
     pool = db_pool.RawConnectionPool(DummyDBModule(), cleanup=cleanup_mock)
     conn = pool.get()
@@ -526,7 +527,8 @@ class TestRawConnectionPool(TestCase):
         pass
     assert cleanup_mock.call_count == 2
 
-    def test_custom_cleanup_arg_error(self):
+
+def test_raw_pool_custom_cleanup_arg_error():
     cleanup_mock = mock.Mock(side_effect=NotImplementedError)
     pool = db_pool.RawConnectionPool(DummyDBModule())
     conn = pool.get()
@@ -537,7 +539,8 @@ class TestRawConnectionPool(TestCase):
         pass
     assert cleanup_mock.call_count == 2
 
-    def test_custom_cleanup_fatal(self):
+
+def test_raw_pool_custom_cleanup_fatal():
     state = [0]
 
     def cleanup(conn):
@@ -555,6 +558,19 @@ class TestRawConnectionPool(TestCase):
     assert state[0] == 1
 
 
+def test_raw_pool_clear_update_current_size():
+    # https://github.com/eventlet/eventlet/issues/139
+    # BaseConnectionPool.clear does not update .current_size.
+    # That leads to situation when new connections could not be created.
+    pool = db_pool.RawConnectionPool(DummyDBModule())
+    pool.get().close()
+    assert pool.current_size == 1
+    assert len(pool.free_items) == 1
+    pool.clear()
+    assert pool.current_size == 0
+    assert len(pool.free_items) == 0
+
+
 get_auth = get_database_auth