Showcase failing tests

build.sbt

@@ -69,7 +69,7 @@ lazy val tests = project
       // Specifically to import XML stuff that got modularised
       "javax.xml.bind" % "jaxb-api" % "2.3.0" % "compile",
       "com.sun.xml.bind" % "jaxb-impl" % "2.3.0" % "compile",
-      "io.circe" %% "circe-core" % "0.9.3"
+      "io.circe" %% "circe-core" % "0.11.1"
     )
   )
   .dependsOn(examplesJVM)

tests/src/main/scala/CirceListTypeTest.scala

@@ -0,0 +1,43 @@
+import estrapade.{TestApp, test}
+
+import language.experimental.macros
+import MagnoliaEncoder.genEncoder
+import io.circe.Encoder
+
+case class Recursive(field: Int, recursion: List[Recursive])
+
+/**
+  * Problem here is that we expect the same behaviour as shapeless Lazy provides -
+  * the derived codec itself would be visible and used to construct the codec for List using circe std one.
+  * Magnolia doesn't see it and derives coproduct codec for List instead, which doesn't look nice for json API:
+  * {{{
+  * {
+  *   "::" : {
+  *      "head" : {
+  *        "field" : 2,
+  *        "recursion" : {
+  *           "Nil" : "Nil"
+  *         }
+  *       },
+  *       "tl$access$1" : {
+  *         "Nil" : "Nil"
+  *       }
+  *     }
+  *   }
+  * }
+  * }}}
+  */
+object CirceRecursiveTypeTest extends TestApp {
+
+  def tests(): Unit = {
+
+    val encoderl = Encoder[List[Recursive]]
+    test("Use available encoders for an immutable list") {
+      encoderl(List(Recursive(1, List(Recursive(2, Nil), Recursive(3, Nil)))))
+    }
+      .assert(
+        j => j.asArray.isDefined,
+        _.toString()
+      )
+  }
+}

tests/src/main/scala/CirceRecursiveTypeTest.scala

@@ -40,5 +40,13 @@ object CirceRecursiveTypeTest extends TestApp {
         j => j.asObject.flatMap(_ ("recursion")).exists(_.isArray),
         _.toString()
       )
+    val encoderl = Encoder[List[Recursive]]
+    test("Use available encoders for an immutable list") {
+      encoderl(List(Recursive(1, List(Recursive(2, Nil), Recursive(3, Nil)))))
+    }
+      .assert(
+        j => j.asArray.isDefined,
+        _.toString()
+      )
   }
 }