add testing/pgruntime

Testing pgruntime has quickly turned out to be a nightmare, because so
many parts of the test logic are not easily reproducible (e.g.
`stopDBIfLingering`). I decided to not waste a bunch of time testing
code that is relatively compact and easy to verify by careful
examination, and that is unlikely to change a lot in the future.

1 files changed, 20 insertions, 0 deletions

diff --git a/testing/pgruntime/main_test.go b/testing/pgruntime/main_test.go
new file mode 100644
index 0000000..3f23871
--- /dev/null
+++ b/testing/pgruntime/main_test.go
@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: 2026 Stefan Majewsky <majewsky@gmx.net>
+// SPDX-License-Identifier: Apache-2.0
+
+package pgruntime_test
+
+import (
+	"testing"
+
+	_ "github.com/lib/pq"
+	"go.xyrillian.de/gg/pgruntime"
+)
+
+var (
+	defaultBehavior = pgruntime.ConnectionBehavior{}
+	connector       = pgruntime.StdConnector("postgres")
+)
+
+func TestMain(m *testing.M) {
+	pgruntime.WithTestDB(m, m.Run)
+}