F!! added support for using jsonapprovals with jackson

approvaltests-tests/pom.xml

@@ -89,6 +89,22 @@
             <artifactId>gson</artifactId>
             <version>2.9.0</version>
         </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-annotations</artifactId>
+            <version>2.13.3</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-core</artifactId>
+            <version>2.13.3</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.13.3</version>
+        </dependency>
+
         <dependency>
             <groupId>commons-httpclient</groupId>
             <artifactId>commons-httpclient</artifactId>

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

@@ -60,6 +60,10 @@ else if (simpleName.equals("JsonApprovals"))
     {
       modifier = 2;
     }
+    else if (simpleName.equals("JsonJacksonApprovals"))
+    {
+      modifier = -2;
+    }
     else if (simpleName.equals("VelocityApprovals"))
     {
       modifier = 2;

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

@@ -53,4 +53,5 @@
  * JsonApprovals. [verifyAsJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonApprovals.java#L25-L28) (Object)  
  * JsonApprovals. [verifyAsJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonApprovals.java#L29-L32) (Object,Function1)  
  * JsonApprovals. [verifyJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonApprovals.java#L17-L20) (String)  
+ * JsonJacksonApprovals. [verifyAsJson ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/JsonJacksonApprovals.java#L10-L13) (Object)  
  * VelocityApprovals. [verify ](https://github.com/approvals/ApprovalTests.Java/blob/master/approvaltests/src/main/java/org/approvaltests/velocity/VelocityApprovals.java#L16-L19) (ContextAware)  

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

@@ -1,14 +1,8 @@
 package org.approvaltests;
 
 import com.google.gson.GsonBuilder;
-import com.google.gson.TypeAdapter;
-import com.google.gson.stream.JsonReader;
-import com.google.gson.stream.JsonWriter;
-import org.approvaltests.reporters.UseReporter;
-import org.approvaltests.reporters.macosx.DiffMergeReporter;
 import org.junit.jupiter.api.Test;
 
-import java.io.IOException;
 import java.time.Instant;
 
 public class JsonFormattingTest

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

@@ -0,0 +1,40 @@
+package org.approvaltests;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.junit.jupiter.api.Test;
+
+public class JsonJacksonApprovalsTest
+{
+  @Test
+  void testDuplicateFields()
+  {
+    JsonJacksonApprovals.verifyAsJson(new MyOtherClass());
+  }
+  private static class MyClass
+  {
+    @JsonIgnore
+    private String name     = "MyClass";
+    public String  lastName = "MyClass";
+    public String getName()
+    {
+      return name;
+    }
+    public void setName(String name)
+    {
+      this.name = name;
+    }
+  }
+  private static class MyOtherClass extends MyClass
+  {
+    @JsonIgnore
+    private String name = "MyOtherClass";
+    public String getName()
+    {
+      return name;
+    }
+    public void setName(String name)
+    {
+      this.name = name;
+    }
+  }
+}

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

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

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

@@ -80,7 +80,7 @@ void testEachMethodHasOneWithOptions()
   public static List<Class<?>> getApprovalClasses()
   {
     return Arrays.asList(Approvals.class, CombinationApprovals.class, AwtApprovals.class, JsonApprovals.class,
-        VelocityApprovals.class);
+        VelocityApprovals.class, JsonJacksonApprovals.class);
   }
   private void verifyEachVerifyMethodHasOneWithOptions(Class<?> approvalsClass)
   {

approvaltests/pom.xml

@@ -32,6 +32,12 @@
             <scope>compile</scope>
             <optional>true</optional>
         </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.13.3</version>
+            <optional>true</optional>
+        </dependency>
         <dependency>
             <groupId>commons-net</groupId>
             <artifactId>commons-net</artifactId>

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

@@ -0,0 +1,30 @@
+package org.approvaltests;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.spun.util.ObjectUtils;
+import org.approvaltests.core.Options;
+
+public class JsonJacksonApprovals
+{
+  public static void verifyAsJson(Object o)
+  {
+    verifyAsJson(o, new Options());
+  }
+  public static void verifyAsJson(Object o, Options options)
+  {
+    Approvals.verify(asJson(o), options.forFile().withExtension(".json"));
+  }
+  public static String asJson(Object o)
+  {
+    try
+    {
+      ObjectMapper objectMapper = new ObjectMapper();
+      return objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(o);
+    }
+    catch (JsonProcessingException e)
+    {
+      throw ObjectUtils.throwAsError(e);
+    }
+  }
+}