Add failing test for #4403 (default enum read fail) (#4408)

src/test/java/com/fasterxml/jackson/databind/deser/enums/EnumDefaultReadTest.java

@@ -90,7 +90,8 @@ enum MixinOverloadedDefault {
     /* Test methods
     /**********************************************************
      */
-    private final ObjectMapper MAPPER = new ObjectMapper();
+
+    private final ObjectMapper MAPPER = newJsonMapper();
 
     @Test
     public void testWithoutCustomFeatures() throws Exception

src/test/java/com/fasterxml/jackson/failing/EnumDefaultRead4403Test.java

@@ -0,0 +1,50 @@
+package com.fasterxml.jackson.failing;
+
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.annotation.JsonEnumDefaultValue;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectReader;
+
+import static com.fasterxml.jackson.databind.testutil.DatabindTestUtil.newJsonMapper;
+import static com.fasterxml.jackson.databind.testutil.DatabindTestUtil.q;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class EnumDefaultRead4403Test
+{
+    // [databind#4403]
+    enum Brand4403 {
+        @JsonProperty("005")
+        SEAT,
+        @JsonProperty("006")
+        HYUNDAI,
+        @JsonEnumDefaultValue
+        OTHER
+    }
+
+    /*
+    /**********************************************************
+    /* Test methods
+    /**********************************************************
+     */
+
+    private final ObjectMapper MAPPER = newJsonMapper();
+
+    // [databind#4403]
+    @Test
+    public void readFromDefault4403() throws Exception
+    {
+        ObjectReader r = MAPPER.readerFor(Brand4403.class)
+                .with(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_USING_DEFAULT_VALUE);
+        assertEquals(Brand4403.SEAT, r.readValue(q("005")));
+        assertEquals(Brand4403.HYUNDAI, r.readValue(q("006")));
+        assertEquals(Brand4403.OTHER, r.readValue(q("x")));
+
+        // Problem here: "001" taken as "Stringified" index 1
+        assertEquals(Brand4403.OTHER, r.readValue(q("001")));
+    }
+
+}