OZG-4097 send-attachment: Adjust remote itcase

src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/HttpProxyConfig.java

+package de.ozgcloud.nachrichten.postfach.osiv2;
+
+import java.util.Optional;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public record HttpProxyConfig(
+		String host,
+		String port
+) {
+
+	public static Optional<HttpProxyConfig> fromEnv() {
+		return Optional.ofNullable(System.getenv("HTTP_PROXY"))
+				.map(HttpProxyConfig::fromEnvVar);
+	}
+
+	private static HttpProxyConfig fromEnvVar(String httpProxyEnvVar) {
+		var matcher = matchProxyRegex(httpProxyEnvVar);
+		return new HttpProxyConfig(
+				matcher.group(1),
+				matcher.group(2)
+		);
+	}
+
+	private static Matcher matchProxyRegex(String text) {
+		var matcher = Pattern.compile("([0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+):([0-9]+)").matcher(text);
+		if (matcher.find()) {
+			return matcher;
+		}
+		throw new IllegalArgumentException("Proxy host and port not found in '%s'".formatted(text));
+	}
+}

src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/OsiPostfachRemoteServiceRemoteITCase.java

 package de.ozgcloud.nachrichten.postfach.osiv2;
 
+import static de.ozgcloud.nachrichten.NachrichtenManagerConfiguration.*;
 import static org.assertj.core.api.Assertions.*;
 
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
+import java.util.Arrays;
+import java.util.Optional;
 
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledIfEnvironmentVariable;
+import org.junit.jupiter.api.extension.RegisterExtension;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.ActiveProfiles;
@@ -15,6 +17,9 @@ import org.springframework.test.context.DynamicPropertyRegistry;
 import org.springframework.test.context.DynamicPropertySource;
 
 import de.ozgcloud.nachrichten.postfach.PostfachNachricht;
+import de.ozgcloud.nachrichten.postfach.osiv2.attachment.Osi2AttachmentFileService;
+import de.ozgcloud.nachrichten.postfach.osiv2.extension.AttachmentExampleUploadUtil;
+import de.ozgcloud.nachrichten.postfach.osiv2.extension.VorgangManagerServerExtension;
 import de.ozgcloud.nachrichten.postfach.osiv2.factory.DummyStringBasedIdentifier;
 import de.ozgcloud.nachrichten.postfach.osiv2.factory.PostfachAddressTestFactory;
 import de.ozgcloud.nachrichten.postfach.osiv2.factory.PostfachNachrichtTestFactory;
@@ -28,33 +33,39 @@ class OsiPostfachRemoteServiceRemoteITCase {
 	@Autowired
 	private OsiPostfachRemoteService osiPostfachRemoteService;
 
+	@RegisterExtension
+	static final VorgangManagerServerExtension VORGANG_MANAGER_SERVER_EXTENSION = new VorgangManagerServerExtension();
+
 	@DynamicPropertySource
 	static void dynamicProperties(DynamicPropertyRegistry registry) {
 		registry.add(
 				"ozgcloud.osiv2.auth.client-secret",
 				() -> System.getenv("SH_STAGE_CLIENT_SECRET")
 		);
+		registry.add(
+				"ozgcloud.osiv2.proxy.enabled",
+				() -> HttpProxyConfig.fromEnv().map(v -> "true").orElse("false")
+		);
 		registry.add(
 				"ozgcloud.osiv2.proxy.host",
-				() -> matchProxyRegex(System.getenv("HTTP_PROXY")).group(1)
+				() -> HttpProxyConfig.fromEnv().map(HttpProxyConfig::host).orElse("")
 		);
 		registry.add(
 				"ozgcloud.osiv2.proxy.port",
-				() -> matchProxyRegex(System.getenv("HTTP_PROXY")).group(2)
+				() -> HttpProxyConfig.fromEnv().map(HttpProxyConfig::port).orElse("")
 		);
+		registry.add("grpc.client." + GRPC_FILE_MANAGER_NAME + ".address", VORGANG_MANAGER_SERVER_EXTENSION::getVorgangManagerAddress);
+		registry.add("grpc.client." + GRPC_FILE_MANAGER_NAME + ".negotiationType", () -> "PLAINTEXT");
 	}
 
-	private static Matcher matchProxyRegex(String text) {
-		var matcher = Pattern.compile("([0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+):([0-9]+)").matcher(text);
-		if (matcher.find()) {
-			return matcher;
-		}
-		throw new IllegalArgumentException("Proxy host and port not found in '%s'".formatted(text));
-	}
 
-	private PostfachNachricht createNachricht() {
+	@Autowired
+	protected Osi2AttachmentFileService osi2AttachmentFileService;
+
+	private PostfachNachricht createNachricht(String... attachmentIds) {
 		return PostfachNachrichtTestFactory.createBuilder()
 				.replyOption(PostfachNachricht.ReplyOption.POSSIBLE)
+				.attachments(Arrays.stream(attachmentIds).toList())
 				.postfachAddress(PostfachAddressTestFactory.createBuilder()
 						.identifier(DummyStringBasedIdentifier.builder()
 								.mailboxId("49b5a7e2-5e60-4baf-8ccf-1f5b94b570f3")
@@ -73,6 +84,16 @@ class OsiPostfachRemoteServiceRemoteITCase {
 				.doesNotThrowAnyException();
 	}
 
+	@DisplayName("should not fail sending message with attachment")
+	@Test
+	void shouldNotFailSendingMessageWithAttachment() {
+		var textFileId = AttachmentExampleUploadUtil.uploadTextFile(osi2AttachmentFileService);
+		var nachricht = createNachricht(textFileId);
+
+		assertThatCode(() -> osiPostfachRemoteService.sendMessage(nachricht))
+				.doesNotThrowAnyException();
+	}
+
 	@DisplayName("should receive messages")
 	@Test
 	void shouldReceiveMessages() {