[tests] Add test for %n references in mod_redirect

tests/t-redirect.py

@@ -11,6 +11,18 @@ redirect "https://%{request.host}%{enc:request.path}?%{request.query}";
 	EXPECT_RESPONSE_CODE = 301
 	EXPECT_RESPONSE_HEADERS = [("Location", "https://forcehttps.redirect/?a_simple_query")]
 
+class TestRemoveWWW(CurlRequest):
+	config = """
+if req.host =~ "^www\.(.+)$" {
+	redirect "http://%1%{enc:request.path}?%{request.query}";
+}
+"""
+
+	vhost = "www.test"
+	URL = "/foo?bar"
+	EXPECT_RESPONSE_CODE = 301
+	EXPECT_RESPONSE_HEADERS = [("Location", "http://test/foo?bar")]
+
 class Test(GroupTest):
 	plain_config = """
 setup { module_load "mod_redirect"; }
@@ -18,4 +30,5 @@ setup { module_load "mod_redirect"; }
 
 	group = [
 		TestForceHttps,
+		TestRemoveWWW
 	]