Add SubProtocolErrorHandler

Issue: SPR-12732

spring-websocket/src/test/java/org/springframework/web/socket/messaging/StompSubProtocolErrorHandlerTests.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2002-2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.web.socket.messaging;
+
+import static org.junit.Assert.*;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.messaging.Message;
+import org.springframework.messaging.MessageHeaders;
+import org.springframework.messaging.simp.stomp.StompCommand;
+import org.springframework.messaging.simp.stomp.StompHeaderAccessor;
+import org.springframework.messaging.support.MessageBuilder;
+import org.springframework.messaging.support.MessageHeaderAccessor;
+
+/**
+ * Unit tests for {@link StompSubProtocolErrorHandler}.
+ * @author Rossen Stoyanchev
+ */
+public class StompSubProtocolErrorHandlerTests {
+
+	private StompSubProtocolErrorHandler handler;
+
+
+	@Before
+	public void setUp() throws Exception {
+		this.handler = new StompSubProtocolErrorHandler();
+	}
+
+
+	@Test
+	public void handleClientMessageProcessingError() throws Exception {
+
+		Exception ex = new Exception("fake exception");
+		Message<byte[]> actual = this.handler.handleClientMessageProcessingError(null, ex);
+
+		StompHeaderAccessor accessor = MessageHeaderAccessor.getAccessor(actual, StompHeaderAccessor.class);
+		assertNotNull(accessor);
+		assertEquals(StompCommand.ERROR, accessor.getCommand());
+		assertEquals(ex.getMessage(), accessor.getMessage());
+		assertArrayEquals(new byte[0], actual.getPayload());
+	}
+
+	@Test
+	public void handleClientMessageProcessingErrorWithReceipt() throws Exception {
+
+		String receiptId = "123";
+		StompHeaderAccessor clientHeaderAccessor = StompHeaderAccessor.create(StompCommand.SEND);
+		clientHeaderAccessor.setReceipt(receiptId);
+		MessageHeaders clientHeaders = clientHeaderAccessor.getMessageHeaders();
+		Message<byte[]> clientMessage = MessageBuilder.createMessage(new byte[0], clientHeaders);
+		Message<byte[]> actual = this.handler.handleClientMessageProcessingError(clientMessage, new Exception());
+
+		StompHeaderAccessor accessor = MessageHeaderAccessor.getAccessor(actual, StompHeaderAccessor.class);
+		assertNotNull(accessor);
+		assertEquals(receiptId, accessor.getReceiptId());
+	}
+
+
+}