Add JSON golden test example

.scalafmt.conf

@@ -1,25 +1,24 @@
 version = "3.7.17"
 
 runner.dialect = scala212source3
-# rewrite.scala3.insertEndMarkerMinLines = 10
-# rewrite.scala3.removeOptionalBraces = true
-# rewrite.scala3.convertToNewSyntax = true
 align.preset = more
 
-# fileOverride {
-#   "glob:**.sbt" {
-#     runner.dialect = scala212source3
-#   }
+fileOverride {
+  # "glob:**.sbt" {
+  #   runner.dialect = scala212source3
+  # }
 
-#   "glob:**/project/**.*" {
-#     runner.dialect = scala212source3
-#   }
+  # "glob:**/project/**.*" {
+  #   runner.dialect = scala212source3
+  # }
 
-#   "glob:**/snapshots-sbt-plugin/**.*" {
-#     runner.dialect = scala212source3
-#   }
+  # "glob:**/snapshots-sbt-plugin/**.*" {
+  #   runner.dialect = scala212source3
 
-#   "glob:**/snapshots-buildtime/**.*" {
-#     runner.dialect = scala212source3
-#   }
-# }
+  "glob:**/scala-3/**.*" {
+    runner.dialect = scala3
+    rewrite.scala3.insertEndMarkerMinLines = 10
+    rewrite.scala3.removeOptionalBraces = true
+    rewrite.scala3.convertToNewSyntax = true
+  }
+}

build.sbt

@@ -78,6 +78,7 @@ lazy val example = projectMatrix
     snapshotsPackageName          := "example",
     snapshotsAddRuntimeDependency := false,
     snapshotsIntegrations += SnapshotIntegration.MUnit,
+    libraryDependencies += "io.circe" %%% "circe-core" % "0.14.6",
     noPublish
   )
   .enablePlugins(SnapshotsPlugin)

modules/example/src/test/resources/snapshots/example/json.codec

@@ -0,0 +1,8 @@
+{
+    "Hello" : {
+        "a" : 25,
+        "b" : {
+            "s" : "yo"
+        }
+    }
+}

modules/example/src/test/scala-3/JsonGoldenTests.scala

@@ -0,0 +1,15 @@
+import com.indoorvivants.snapshots.munit_integration.*
+import munit.*
+
+import io.circe.*, io.circe.syntax.*
+
+case class Test(s: String)
+enum MyStuff derives Codec.AsObject:
+  case Hello(a: Int, b: Test)
+  case Bla(x: Boolean)
+
+class JsonGoldenTests extends FunSuite with MunitSnapshotsIntegration:
+  test("json tests") {
+    val obj = MyStuff.Hello(25, Test("yo"))
+    assertSnapshot("json.codec", obj.asJson.spaces4)
+  }