feat: wire Amazon mock into http-client integration tests

- Add cmd/mock-amazon/main.go (mirrors mock-spotify, uses testutils/amazon)
- Add amazon-mock service to docker-compose.yml (port 8082)
- Add AMAZON_CLIENT_ID/SECRET/TOKEN_URL/PROFILE_URL to docker-compose.ci.yml
- Add amazon_registration.http: registers account via /mgmt/amazon/callback
  before the token-refresh test runs (mirrors spotify_registration.http)
- Update {{amazonRefreshToken}} in env to match mock response (Atzr|amazon-refresh-token)
- Log amazon-mock output on test failure in Makefile

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Makefile

@@ -124,6 +124,7 @@ test-http-client:
 		--env-file /workdir/http-client.env.json \
 		--env ci \
 		/workdir/spotify_registration.http \
+		/workdir/amazon_registration.http \
 		/workdir/create_account.http \
 		/workdir/register_device.http \
 		/workdir/spotify_full_flow.http \
@@ -156,6 +157,7 @@ test-http-client:
 	EXIT_CODE=$$?; \
 	docker compose -f docker-compose.yml -f docker-compose.ci.yml logs soundtouch-service; \
 	docker compose -f docker-compose.yml -f docker-compose.ci.yml logs spotify-mock; \
+	docker compose -f docker-compose.yml -f docker-compose.ci.yml logs amazon-mock; \
 	docker compose -f docker-compose.yml -f docker-compose.ci.yml down; \
 	exit $$EXIT_CODE
 

cmd/mock-amazon/main.go

@@ -0,0 +1,23 @@
+// Package main provides a mock Amazon LWA server for testing purposes.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/gesellix/bose-soundtouch/pkg/testutils/amazon"
+)
+
+func main() {
+	port := flag.Int("port", 8080, "Port to listen on")
+
+	flag.Parse()
+
+	log.Printf("Starting mock Amazon LWA server on port %d", *port)
+
+	if err := http.ListenAndServe(fmt.Sprintf(":%d", *port), amazon.NewAmazonHandler()); err != nil {
+		log.Fatal(err)
+	}
+}

docker-compose.ci.yml

@@ -10,3 +10,7 @@ services:
       - SPOTIFY_CLIENT_SECRET=mock-secret
       - SPOTIFY_TOKEN_URL=http://spotify-mock:8080/api/token
       - SPOTIFY_API_BASE=http://spotify-mock:8080
+      - AMAZON_CLIENT_ID=mock-amazon-id
+      - AMAZON_CLIENT_SECRET=mock-amazon-secret
+      - AMAZON_TOKEN_URL=http://amazon-mock:8080/auth/o2/token
+      - AMAZON_PROFILE_URL=http://amazon-mock:8080/user/profile

docker-compose.yml

@@ -49,6 +49,18 @@ services:
     networks:
       - soundtouch-test-net
 
+  amazon-mock:
+    image: golang:1.26.2-alpine
+    container_name: amazon-mock
+    working_dir: /app
+    volumes:
+      - .:/app
+    command: go run ./cmd/mock-amazon/main.go -port 8080
+    ports:
+      - "8082:8080"
+    networks:
+      - soundtouch-test-net
+
 networks:
   soundtouch-test-net:
     name: soundtouch-test-net

tests/integration/http-client/amazon_registration.http

@@ -0,0 +1,36 @@
+### Amazon Music Initial Registration Flow
+
+# @name Init Amazon Flow
+POST {{host}}/mgmt/amazon/init
+Authorization: Basic admin change_me!
+
+> {%
+ client.global.set("redirectUrl", response.body.redirectUrl);
+ %}
+
+###
+
+# @name Amazon Callback
+# Simulates the user being redirected back from Amazon LWA with a code
+GET {{host}}/mgmt/amazon/callback?code=mock-auth-code
+
+###
+
+# @name Verify Accounts
+GET {{host}}/mgmt/amazon/accounts
+Authorization: Basic admin change_me!
+
+> {%
+ client.test("Account exists", function() {
+     client.assert(response.body.accounts.length > 0, "No accounts found");
+     var found = false;
+     for (var i = 0; i < response.body.accounts.length; i++) {
+         if (response.body.accounts[i].user_id === "amzn1.account.TESTUSER") {
+             found = true;
+             client.assert(response.body.accounts[i].display_name === "Amazon Test User", "Display name mismatch");
+             break;
+         }
+     }
+     client.assert(found, "Account 'amzn1.account.TESTUSER' not found in " + JSON.stringify(response.body.accounts));
+ });
+ %}

tests/integration/http-client/http-client.env.json

@@ -18,7 +18,7 @@
     "spotifyRefreshToken": "example-spotify-refresh-token",
     "spotifyDisplayName": "For Lovers, Not Killers",
     "amazonProviderID": "20",
-    "amazonRefreshToken": "example-amazon-refresh-token",
+    "amazonRefreshToken": "Atzr|amazon-refresh-token",
     "bmxApiKey": "bmx-api-key",
     "qplayProviderID": "26"
   },
@@ -41,7 +41,7 @@
     "spotifyRefreshToken": "example-spotify-refresh-token",
     "spotifyDisplayName": "For Lovers, Not Killers",
     "amazonProviderID": "20",
-    "amazonRefreshToken": "example-amazon-refresh-token",
+    "amazonRefreshToken": "Atzr|amazon-refresh-token",
     "bmxApiKey": "bmx-api-key",
     "qplayProviderID": "26"
   }