fix(tar): test http status and not error string in body (#221)

* Look for correct error message

The error message in boxo was fixed to say "not allowed" instead of "now allowed". The message that the gateway conformance test looks for needs to match.

* refactor: make test backward-compatible

---------

Co-authored-by: Marcin Rataj <lidel@lidel.org>

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.6.2] - 2024-08-09
+### Changed
+- Relaxed negative test of TAR response [#221](https://github.com/ipfs/gateway-conformance/pull/221)
+
 ## [0.6.1] - 2024-07-29
 ### Changed
 - Support meaningful `Cache-Control` on generated UnixFS directory listing responses on `/ipfs` namespace

tests/path_gateway_tar_test.go

@@ -89,13 +89,12 @@ func TestTar(t *testing.T) {
 		},
 		{
 			Name: "GET TAR with relative paths outside root fails",
+			Hint: "relative UnixFS paths outside the root are not allowed",
 			Request: Request().
 				Path("/ipfs/{{cid}}", outsideRootCID).
 				Query("format", "tar"),
 			Response: Expect().
-				Body(
-					Contains("relative UnixFS paths outside the root are now allowed"),
-				),
+				StatusBetween(400, 599),
 		},
 		{
 			Name: "GET TAR with relative paths inside root works",