Add test to run extension installcheck

tests/test_server_ops.py

@@ -41,6 +41,8 @@
 import httpx
 from edgedb import errors
 
+import edb
+from edb import buildmeta
 from edb import protocol
 from edb.common import devmode
 from edb.protocol import protocol as edb_protocol  # type: ignore
@@ -1506,3 +1508,38 @@ def reload_server(self):
         json.dump(self.conf, self.conf_file.file)
         self.conf_file.file.flush()
         self.srv.proc.send_signal(signal.SIGHUP)
+
+
+class TestPGExtensions(tb.TestCase):
+    async def test_edb_stat_statements(self):
+        ext_home = (
+            pathlib.Path(edb.__file__).parent.parent / 'edb_stat_statements'
+        ).resolve()
+        if not ext_home.exists():
+            raise unittest.SkipTest("no source of edb_stat_statements")
+        with tempfile.TemporaryDirectory() as td:
+            cluster = await pgcluster.get_local_pg_cluster(td, log_level='s')
+            cluster.update_connection_params(
+                user='postgres',
+                database='template1',
+            )
+            self.assertTrue(await cluster.ensure_initialized())
+            await cluster.start(server_settings={
+                'edb_stat_statements.track_planning': 'false',
+                'max_prepared_transactions': '5',
+            })
+            try:
+                pg_config = buildmeta.get_pg_config_path()
+                env = os.environ.copy()
+                params = cluster.get_pgaddr()
+                env['PGHOST'] = params.host
+                env['PGPORT'] = params.port
+                env['PGUSER'] = params.user
+                env['PGDATABASE'] = params.database
+                subprocess.check_output([
+                    'make',
+                    f'PG_CONFIG={pg_config}',
+                    'installcheck',
+                ], cwd=str(ext_home), env=env)
+            finally:
+                await cluster.stop()