- F allow customization of ObjectMapper used in JsonJacksonApprovals - closes #478

Co-authored-by: Jay Bazuzi <[email protected]>
Co-authored-by: Llewellyn Falco <[email protected]>

Author: 3 people

approvaltests-tests/src/test/java/org/approvaltests/DocumentHelpersTest.listAllVerifyFunctions.approved.md

@@ -56,6 +56,7 @@
  * JsonApprovals. [verifyJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonApprovals.java#L17-L20) (String, $\color{#AAA}{\textsf{Options}}$)  
  * JsonApprovals. [verifyJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonApprovals.java#L37-L40) (String, boolean, $\color{#AAA}{\textsf{Options}}$)  
  * JsonApprovals. [verifyJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonApprovals.java#L29-L36) (String, boolean, Function1, $\color{#AAA}{\textsf{Options}}$)  
- * JsonJacksonApprovals. [verifyAsJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonJacksonApprovals.java#L14-L17) (Object, $\color{#AAA}{\textsf{Options}}$)  
+ * JsonJacksonApprovals. [verifyAsJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonJacksonApprovals.java#L17-L20) (Object, $\color{#AAA}{\textsf{Options}}$)  
+ * JsonJacksonApprovals. [verifyAsJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonJacksonApprovals.java#L25-L28) (Object, Function1, $\color{#AAA}{\textsf{Options}}$)  
  * JsonXstreamApprovals. [verifyAsJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonXstreamApprovals.java#L18-L21) (Object, $\color{#AAA}{\textsf{Options}}$)  
  * VelocityApprovals. [verify ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/velocity/VelocityApprovals.java#L16-L24) (ContextAware, $\color{#AAA}{\textsf{Options}}$)  

approvaltests-tests/src/test/java/org/approvaltests/JsonJacksonApprovalsTest.java

@@ -1,10 +1,21 @@
 package org.approvaltests;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.gson.GsonBuilder;
 import org.junit.jupiter.api.Test;
 
 public class JsonJacksonApprovalsTest
 {
+  @Test
+  void testObjectMapperOverride()
+  {
+    MyClass o = new MyClass();
+
+    JsonJacksonApprovals.verifyAsJson(o, (om)-> om
+            .setSerializationInclusion(JsonInclude.Include.NON_NULL));
+  }
   @Test
   void testDuplicateFields()
   {
@@ -15,6 +26,7 @@ private static class MyClass
     @JsonIgnore
     private String name     = "MyClass";
     public String  lastName = "MyClass";
+    public String  middleName = null;
     public String getName()
     {
       return name;

approvaltests-tests/src/test/java/org/approvaltests/JsonJacksonApprovalsTest.testDuplicateFields.approved.json

@@ -1,3 +1,4 @@
 {
-  "lastName" : "MyClass"
+  "lastName" : "MyClass",
+  "middleName" : null
 }

approvaltests-tests/src/test/java/org/approvaltests/JsonJacksonApprovalsTest.testObjectMapperOverride.approved.json

@@ -0,0 +1,3 @@
+{
+  "lastName" : "MyClass"
+}

approvaltests-tests/src/test/java/org/approvaltests/JsonJacksonApprovalsTest.testUsingObjectMapperWithPrettyPrint.approved.json

@@ -0,0 +1,3 @@
+{
+  "lastName" : "MyClass"
+}

approvaltests/src/main/java/org/approvaltests/JsonJacksonApprovals.java

@@ -4,6 +4,9 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.spun.util.ObjectUtils;
 import org.approvaltests.core.Options;
+import org.lambda.functions.Function1;
+
+import java.util.function.Function;
 
 public class JsonJacksonApprovals
 {
@@ -13,13 +16,24 @@ public static void verifyAsJson(Object o)
   }
   public static void verifyAsJson(Object o, Options options)
   {
-    Approvals.verify(asJson(o), options.forFile().withExtension(".json"));
+    verifyAsJson(o, a -> a, options);
+  }
+  public static void verifyAsJson(Object o, Function1<ObjectMapper, ObjectMapper> objectMapperBuilder)
+  {
+    verifyAsJson(o, objectMapperBuilder, new Options());
+  }
+  public static void verifyAsJson(Object o, Function1<ObjectMapper, ObjectMapper> objectMapperBuilder, Options options)
+  {
+    Approvals.verify(asJson(o, objectMapperBuilder), options.forFile().withExtension(".json"));
+  }
+  public static String asJson(Object o) {
+    return asJson(o, a -> a);
   }
-  public static String asJson(Object o)
+  public static String asJson(Object o, Function1<ObjectMapper, ObjectMapper> objectMapperBuilder)
   {
     try
     {
-      ObjectMapper objectMapper = new ObjectMapper();
+      ObjectMapper objectMapper = objectMapperBuilder.call(new ObjectMapper());
       return objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(o);
     }
     catch (JsonProcessingException e)