Add failing test for #279 (#317)

datetime/src/test/java/com/fasterxml/jackson/datatype/jsr310/deser/OffsetDateTimeDeserTest.java

@@ -66,7 +66,7 @@ public WrapperWithReadTimestampsAsNanosEnabled() { }
         public WrapperWithReadTimestampsAsNanosEnabled(OffsetDateTime v) { value = v; }
     }
 
-    private ObjectMapper MAPPER = newMapper();
+    private final ObjectMapper MAPPER = newMapper();
 
     @Test
     public void testDeserializationAsFloat01WithoutTimeZone() throws Exception

datetime/src/test/java/com/fasterxml/jackson/datatype/jsr310/failing/OffsetDateTimeDeser279Test.java

@@ -0,0 +1,47 @@
+package com.fasterxml.jackson.datatype.jsr310.failing;
+
+import java.time.OffsetDateTime;
+import java.time.ZoneId;
+import java.time.temporal.ChronoUnit;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jsr310.ModuleTestBase;
+
+import static org.junit.Assert.assertEquals;
+
+public class OffsetDateTimeDeser279Test extends ModuleTestBase
+{
+    // For [modules-java8#279]
+    static class Wrapper279 {
+        OffsetDateTime date;
+
+        public Wrapper279(OffsetDateTime d) { date = d; }
+        protected Wrapper279() { }
+
+        @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd'T'HH:mm:ss'Z'")
+        public OffsetDateTime getDate() {
+            return date;
+        }
+        public void setDate(OffsetDateTime date) {
+            this.date = date;
+        }
+    }
+
+    private ObjectMapper MAPPER = newMapper();
+
+    // For [modules-java8#279]
+    @Test
+    public void testWrapperWithPattern279() throws Exception
+    {
+        final OffsetDateTime date = OffsetDateTime.now(ZoneId.of("UTC"))
+                .truncatedTo(ChronoUnit.SECONDS);
+        final Wrapper279 input = new Wrapper279(date);
+        final String json = MAPPER.writeValueAsString(input);
+
+        Wrapper279 result = MAPPER.readValue(json, Wrapper279.class);
+        assertEquals(input.date, result.date);
+    }
+}