1 files changed, 27 insertions, 0 deletions
diff --git a/tests/test_dns.py b/tests/test_dns.py
new file mode 100644
index 0000000..f50092f
--- /dev/null
+++ b/tests/test_dns.py
@@ -0,0 +1,27 @@
+import pytest
+
+import psycopg
+from psycopg.conninfo import conninfo_to_dict
+
+pytestmark = [pytest.mark.dns]
+
+
+@pytest.mark.asyncio
+async def test_resolve_hostaddr_async_warning(recwarn):
+    import_dnspython()
+    conninfo = "dbname=foo"
+    params = conninfo_to_dict(conninfo)
+    params = await psycopg._dns.resolve_hostaddr_async(  # type: ignore[attr-defined]
+        params
+    )
+    assert conninfo_to_dict(conninfo) == params
+    assert "resolve_hostaddr_async" in str(recwarn.pop(DeprecationWarning).message)
+
+
+def import_dnspython():
+    try:
+        import dns.rdtypes.IN.A  # noqa: F401
+    except ImportError:
+        pytest.skip("dnspython package not available")
+
+    import psycopg._dns  # noqa: F401