should be it

external/duckdb/tools/shell/tests/test_get_env.py

@@ -0,0 +1,30 @@
+# fmt: off
+
+from conftest import ShellTest
+
+def test_get_env(shell):
+    test = (
+        ShellTest(shell)
+            .statement('.null NULL')
+            .statement("SET default_null_order=getenv('DEFAULT_NULL_ORDER');")
+            .statement("SELECT * FROM (VALUES (42), (NULL)) ORDER BY 1 LIMIT 1;")
+    )
+    test.environment['DEFAULT_NULL_ORDER'] = 'NULLS_FIRST'
+    result = test.run()
+    result.check_stdout('NULL')
+
+    test.environment['DEFAULT_NULL_ORDER'] = 'NULLS_LAST'
+    result = test.run()
+    result.check_stdout('42')
+
+def test_get_env_permissions(shell):
+    test = (
+        ShellTest(shell)
+            .statement('SET enable_external_access=false')
+            .statement("SELECT getenv('DEFAULT_NULL_ORDER');")
+    )
+    test.environment['DEFAULT_NULL_ORDER'] = 'NULLS_FIRST'
+    result = test.run()
+    result.check_stderr('disabled through configuration')
+
+# fmt: on