configure objectMapper to ignore unknown properties

Author: ORybak5

service/src/main/java/uk/nhs/adaptors/gp2gp/common/configuration/ObjectMapperConfig.java

@@ -1,6 +1,7 @@
 package uk.nhs.adaptors.gp2gp.common.configuration;
 
 import com.fasterxml.jackson.core.StreamReadConstraints;
+import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -13,6 +14,7 @@ public ObjectMapper objectMapper() {
         ObjectMapper mapper = new ObjectMapper();
         mapper.getFactory().setStreamReadConstraints(
             StreamReadConstraints.builder().maxStringLength(Integer.MAX_VALUE).build());
+        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
         return mapper;
     }
 }

service/src/test/java/uk/nhs/adaptors/gp2gp/common/configuration/ObjectMapperConfigTest.java

@@ -1,10 +1,12 @@
 package uk.nhs.adaptors.gp2gp.common.configuration;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.StreamReadConstraints;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.jupiter.api.Test;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 class ObjectMapperConfigTest {
@@ -24,4 +26,25 @@ void objectMapperConfigSetToWorkWithUnlimitedDataSizeTest() {
         context.close();
     }
 
+    @Test
+    public void objectMapperConfigIgnoresUnknownPropertiesTest() {
+
+        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ObjectMapperConfig.class);
+        ObjectMapper objectMapper = context.getBean(ObjectMapper.class);
+
+        String jsonWithUnknownProperty = "{\"knownProperty\":\"testValue\", \"unknownProperty\":\"extraValue\"}";
+
+        assertDoesNotThrow(() -> {
+            TestClass result = objectMapper.readValue(jsonWithUnknownProperty, TestClass.class);
+            assertEquals("testValue", result.knownProperty);
+        });
+
+        context.close();
+    }
+
+    public static class TestClass {
+        @JsonProperty("knownProperty")
+        private String knownProperty;
+    }
+
 }