fix: add missed test that was removed on the laste merge

client/src/test/java/dev/fitko/fitconnect/client/SubscriberClientTest.java

@@ -357,6 +357,58 @@ class SubscriberClientTest {
         assertThat(receivedSubmission.getSubmissionMetadata().getContentStructure().getData().getHash().getContent(), is("bla"));
     }
 
+    @Test
+    void testUnknownAdditionalReferenceInfoProperty() throws JsonProcessingException {
+
+        final var dataPayload = "{ some : 'data foo' }";
+        final var submissionId = UUID.randomUUID();
+        final CryptoService cryptoService = new JWECryptoService(new HashService());
+
+        final Map<String, Map<String, Object>> metadata = Map.of(
+                "contentStructure", Map.of(
+                        "data", Map.of(
+                                "hash", Map.of(
+                                        "type", SignatureType.SHA_512,
+                                        "content", cryptoService.hashBytes(dataPayload.getBytes())
+                                ),
+                                "submissionSchema", Map.of(
+                                        "schemaUri", URI.create("https://dummy.schema.url"),
+                                        "mimeType", MimeType.APPLICATION_JSON
+                                )
+                        ),
+                        "attachments", Collections.EMPTY_LIST),
+                "additionalReferenceInfo", Map.of(
+                        "x-sender", "SOME_ADDITIONAL_UNKNOWN_PROPERTY",
+                        "senderReference", "sender_123")
+        );
+
+        final byte[] metadataBytes = mapper.writeValueAsBytes(metadata);
+
+        final RSAKey encryptionKey = privateKey;
+        final RSAKey decryptionKey = encryptionKey.toPublicJWK();
+
+        final String encryptedData = cryptoService.encryptString(decryptionKey, dataPayload);
+        final String encryptedMetadata = cryptoService.encryptBytes(decryptionKey, metadataBytes);
+
+        final var submission = new Submission();
+        submission.setSubmissionId(submissionId);
+        submission.setEncryptedData(encryptedData);
+        submission.setEncryptedMetadata(encryptedMetadata);
+
+        when(subscriberMock.getSubmission(any())).thenReturn(submission);
+        when(subscriberMock.validateMetadata(any())).thenReturn(ValidationResult.ok());
+        when(subscriberMock.validateHashIntegrity(any(), any())).thenReturn(ValidationResult.ok());
+        when(subscriberMock.decryptStringContent(encryptionKey, submission.getEncryptedData())).thenReturn(dataPayload.getBytes());
+        when(subscriberMock.decryptStringContent(encryptionKey, submission.getEncryptedMetadata())).thenReturn(metadataBytes);
+
+        // When
+        final var receivedSubmission = underTest.requestSubmission(submissionId);
+
+        // Then
+        assertNotNull(receivedSubmission.getSubmissionMetadata());
+        assertThat(receivedSubmission.getSubmissionMetadata().getAdditionalReferenceInfo().getSenderReference(), is("sender_123"));
+    }
+
     @Test
     void testCorruptedData() throws JsonProcessingException {