Add test for Comparable Marshallable - closes #751

src/test/java/net/openhft/chronicle/wire/issue/Issue751Test.java

@@ -0,0 +1,49 @@
+package net.openhft.chronicle.wire.issue;
+
+import net.openhft.chronicle.bytes.Bytes;
+import net.openhft.chronicle.wire.*;
+import org.jetbrains.annotations.NotNull;
+import org.junit.Test;
+
+public class Issue751Test extends WireTestCommon {
+
+    public static class One extends SelfDescribingMarshallable {
+        Comparable<?> text;
+
+        public One(Comparable<?> text) {
+            this.text = text;
+        }
+    }
+
+    public static class Two implements Comparable<Two>, Marshallable {
+        Comparable<?> text;
+
+        public Two(Comparable<?> text) {
+            this.text = text;
+        }
+
+        @Override
+        public int compareTo(@NotNull Issue751Test.Two o) {
+            return text.hashCode() - o.text.hashCode();
+        }
+    }
+
+    public static class Three extends SelfDescribingMarshallable {
+        private One one;
+        private Two two;
+
+        public Three(One one, Two two) {
+            this.one = one;
+            this.two = two;
+        }
+    }
+
+    @Test
+    public void comparableField() {
+        Wire wire = new YamlWire(Bytes.allocateElasticOnHeap());
+        wire.write("first").object(new Three(
+                new One("hello"), new Two(42)));
+
+        System.err.println(wire.read("first").object());
+    }
+}