add X-Ca-Stage support

.gitattributes

@@ -0,0 +1,6 @@
+/tests export-ignore
+/.github export-ignore
+.gitattributes export-ignore
+.gitignore export-ignore
+.php_cs.dist export-ignore
+phpunit.xml.dist export-ignore

src/RequestSigner.php

@@ -17,10 +17,11 @@ class RequestSigner
     public const HEADER_X_CA_SIGNATURE_METHOD = 'X-Ca-SignatureMethod';
     public const HEADER_X_CA_SIGNATURE_HEADERS = 'X-Ca-Signature-Headers';
     public const HEADER_X_CA_TIMESTAMP = 'X-Ca-Timestamp';
-    public const HEADER_DATE = 'Date';
-    public const HEADER_CONTENT_MD5 = 'Content-MD5';
     public const HEADER_X_CA_NONCE = 'X-Ca-Nonce';
     public const HEADER_X_CA_KEY = 'X-Ca-Key';
+    public const HEADER_X_CA_STAGE = 'X-Ca-Stage';
+    public const HEADER_DATE = 'Date';
+    public const HEADER_CONTENT_MD5 = 'Content-MD5';
 
     /** @var Key */
     private $key;
@@ -33,6 +34,7 @@ class RequestSigner
         self::HEADER_X_CA_NONCE,
         self::HEADER_X_CA_SIGNATURE_METHOD,
         self::HEADER_X_CA_TIMESTAMP,
+        self::HEADER_X_CA_STAGE,
     ];
 
     public function __construct(Key $key, ?DigestInterface $digest = null)

tests/RequestSignerTest.php

@@ -91,21 +91,27 @@ public function requestDataProvider(): array
         ];
     }
 
-    public function testRequestSignatureWithFixedNonceAndDate(): void
+    public function testRequestSignatureWithFixedNonceAndDateWithStage(): void
     {
         $requestSigner = new RequestSigner(new Key('1234', '5678'));
         $request = new Request(
             'https://example.com/v1.0/category/123/products?page=10',
             'GET',
             'php://memory',
-            ['Accept' => '*/*', 'Content-Type' => 'application/json']
+            [
+                'Accept'       => '*/*',
+                'Content-Type' => 'application/json',
+                'X-Ca-Stage'   => 'test',
+            ]
         );
         $signedRequest = $requestSigner->signRequest($request, new DateTime('2020-04-30'), '');
         $this->assertSignedRequest(
             $signedRequest,
             '',
             1588204800000,
-            'YqDp37hUo5bxAL7lg53iabau7qhMYRMCwQKklZpZuMc='
+            'VoQMES7AM9S8GpXH8xMi9kl7E5/Xb4wsdL+jhNTnO08=',
+            '',
+            'x-ca-key,x-ca-nonce,x-ca-signaturemethod,x-ca-stage,x-ca-timestamp'
         );
     }