Add basic test case for fixing 617

Author: changlinli

src/test/java/com/rabbitmq/client/impl/ValueWriterTest.java

@@ -0,0 +1,30 @@
+package com.rabbitmq.client.impl;
+
+import org.junit.Test;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.math.BigDecimal;
+import java.util.ArrayDeque;
+import java.util.Queue;
+
+public class ValueWriterTest {
+    @Test(expected = IllegalArgumentException.class) public void writingOverlyLargeBigDecimalShouldFail() throws IOException {
+        Queue<Byte> queue = new ArrayDeque<>();
+
+        OutputStream outputStream = new OutputStream() {
+            @Override
+            public void write(int b) {
+                queue.add((byte) b);
+            }
+        };
+
+        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
+
+        ValueWriter valueWriter = new ValueWriter(dataOutputStream);
+
+        valueWriter.writeFieldValue(new BigDecimal(Integer.MAX_VALUE).add(new BigDecimal(1)));
+
+    }
+}