Add failing test for #1850

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/failing/EnumAliasDeser2352Test.java

@@ -5,6 +5,7 @@
 
 import com.fasterxml.jackson.databind.*;
 
+// Fixed in 2.11.0, but not 2.10.x
 public class EnumAliasDeser2352Test extends BaseMapTest
 {
     // for [databind#2352]: Support aliases on enum values

src/test/java/com/fasterxml/jackson/failing/EnumDeserializationFromInt1850Test.java

@@ -0,0 +1,36 @@
+package com.fasterxml.jackson.failing;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+
+import com.fasterxml.jackson.databind.*;
+
+public class EnumDeserializationFromInt1850Test extends BaseMapTest
+{
+    enum Example1 {
+        A(101);
+        final int x;
+        Example1(int x) { this.x = x; }
+        @JsonValue
+        public int code() { return x; }
+    }
+
+    enum Example2 {
+        A(202);
+        @JsonValue
+        public final int x;
+        Example2(int x) { this.x = x; }
+    }
+
+    public void testEnumFromInt1850() throws Exception
+    {
+        final ObjectMapper mapper = newJsonMapper();
+
+        String json = mapper.writeValueAsString(Example1.A);
+        Example1 e1 = mapper.readValue(json, Example1.class);
+        assertEquals(Example1.A, e1);
+
+        json = mapper.writeValueAsString(Example2.A);
+        Example2 e2 = mapper.readValue(json, Example2.class);
+        assertEquals(Example2.A, e2);
+    }
+}