test: add missing DNSLink -> IPNS resolution

CHANGELOG.md

@@ -4,6 +4,11 @@ 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).
 
+## [0.11.0] - 2026-02-24
+### Added
+- New test `TestDNSLinkGatewayIPNS` for DNSLink TXT records pointing at `/ipns/<key>` instead of `/ipfs/<cid>`. All prior DNSLink tests only covered the `/ipfs/` case. [#272](https://github.com/ipfs/gateway-conformance/pull/272)
+- New test cases in `TestSubdomainGatewayDNSLinkInlining` for the subdomain form of DNSLink -> IPNS resolution (`{dnslink}.ipns.{gateway}` and `{inlined-dnslink}.ipns.{gateway}`). [#272](https://github.com/ipfs/gateway-conformance/pull/272)
+
 ## [0.10.1] - 2026-02-13
 ### Fixed
 - Renamed `Base32Cid()` to `DNSSafeCidV1()` and fixed it to convert CIDv0 to CIDv1 before encoding. Uses base36 for `libp2p-key` codec (IPNS keys) and base32 for everything else, producing valid DNS-safe CID strings for subdomain gateway tests. [#264](https://github.com/ipfs/gateway-conformance/issues/264)

fixtures/dnslink_ipns/dnslink.yml

@@ -0,0 +1,10 @@
+# yaml-language-server: $schema=../fixture.schema.json
+dnslinks:
+  dnslink-over-ipns:
+    domain: dnslink-over-ipns.example.org
+    # Ed25519 IPNS key from subdomain_gateway fixtures (base58btc peer ID)
+    path: /ipns/12D3KooWLQzUv2FHWGVPXTXSZpdHs7oHbXub2G5WC8Tx4NQhyd2d
+  dnslink-over-ipns-cidv1:
+    domain: dnslink-over-ipns-cidv1.example.org
+    # same Ed25519 key as above, but using CIDv1 with libp2p-key multicodec (base36)
+    path: /ipns/k51qzi5uqu5dk3v4rmjber23h16xnr23bsggmqqil9z2gduiis5se8dht36dam

tests/dnslink_gateway_ipns_test.go

@@ -0,0 +1,56 @@
+package tests
+
+import (
+	"testing"
+
+	"github.com/ipfs/gateway-conformance/tooling"
+	"github.com/ipfs/gateway-conformance/tooling/car"
+	"github.com/ipfs/gateway-conformance/tooling/dnslink"
+	"github.com/ipfs/gateway-conformance/tooling/specs"
+	. "github.com/ipfs/gateway-conformance/tooling/test"
+)
+
+func TestDNSLinkGatewayIPNS(t *testing.T) {
+	tooling.LogTestGroup(t, GroupDNSLink)
+
+	dnsLinks := dnslink.MustOpenDNSLink("dnslink_ipns/dnslink.yml")
+	dnsLinkB58 := dnsLinks.MustGet("dnslink-over-ipns")
+	dnsLinkCIDv1 := dnsLinks.MustGet("dnslink-over-ipns-cidv1")
+
+	// same content the Ed25519 IPNS record from subdomain_gateway points at
+	fixture := car.MustOpenUnixfsCar("subdomain_gateway/fixtures.car")
+	payload := string(fixture.MustGetRawData("hello-CIDv1"))
+
+	tests := SugarTests{
+		{
+			Name: "GET for DNSLink with dnslink=/ipns/{peer-id} returns expected payload",
+			Hint: `
+			When a DNSLink TXT record points to /ipns/<peer-id> (base58btc),
+			the gateway must resolve the IPNS name and then serve the content
+			it points to.
+			`,
+			Request: Request().
+				Header("Host", dnsLinkB58).
+				Path("/"),
+			Response: Expect().
+				Status(200).
+				Body(payload),
+		},
+		{
+			Name: "GET for DNSLink with dnslink=/ipns/{cidv1-libp2p-key} returns expected payload",
+			Hint: `
+			When a DNSLink TXT record points to /ipns/<cidv1-libp2p-key> (base36),
+			the gateway must resolve the IPNS name and then serve the content
+			it points to.
+			`,
+			Request: Request().
+				Header("Host", dnsLinkCIDv1).
+				Path("/"),
+			Response: Expect().
+				Status(200).
+				Body(payload),
+		},
+	}
+
+	RunWithSpecs(t, tests, specs.DNSLinkGateway)
+}

tests/subdomain_gateway_ipns_test.go

@@ -236,5 +236,44 @@ func TestSubdomainGatewayDNSLinkInlining(t *testing.T) {
 		},
 	}...)
 
+	// DNSLink with dnslink=/ipns/{key} (resolves through IPNS)
+	dnsLinksIPNS := dnslink.MustOpenDNSLink("dnslink_ipns/dnslink.yml")
+	dnsLinkOverIPNS := dnsLinksIPNS.MustGet("dnslink-over-ipns")
+	dnsLinkOverIPNSCIDv1 := dnsLinksIPNS.MustGet("dnslink-over-ipns-cidv1")
+
+	fixture := car.MustOpenUnixfsCar("subdomain_gateway/fixtures.car")
+	ipnsPayload := string(fixture.MustGetRawData("hello-CIDv1"))
+
+	for _, dnsLinkIPNS := range []struct {
+		name   string
+		domain string
+	}{
+		{"peer-id", dnsLinkOverIPNS},
+		{"cidv1-libp2p-key", dnsLinkOverIPNSCIDv1},
+	} {
+		tests = append(tests, SugarTests{
+			{
+				Name: "request for {dnslink}.ipns.{gateway} with dnslink=/ipns/{" + dnsLinkIPNS.name + "} returns expected payload",
+				Hint: "DNSLink TXT record pointing at /ipns/<key> must be resolved recursively via IPNS",
+				Request: Request().
+					Header("Host", Fmt("{{dnslink}}.ipns.{{host}}", dnsLinkIPNS.domain, u.Host)).
+					Path("/"),
+				Response: Expect().
+					Status(200).
+					Body(ipnsPayload),
+			},
+			{
+				Name: "request for {inlined-dnslink}.ipns.{gateway} with dnslink=/ipns/{" + dnsLinkIPNS.name + "} returns expected payload",
+				Hint: "DNSLink TXT record pointing at /ipns/<key> must be resolved recursively via IPNS (inlined form)",
+				Request: Request().
+					Header("Host", Fmt("{{inlined}}.ipns.{{host}}", dnslink.InlineDNS(dnsLinkIPNS.domain), u.Host)).
+					Path("/"),
+				Response: Expect().
+					Status(200).
+					Body(ipnsPayload),
+			},
+		}...)
+	}
+
 	RunWithSpecs(t, tests, specs.SubdomainGatewayIPNS)
 }