FromFromInput (#74)

rallyhealth · May 15, 2021 · 995efc9 · 995efc9
1 parent c6aff3d
commit 995efc9
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diff --git a/weepickle-tests/src/test/scala/com/rallyhealth/weepickle/v1/DefaultsTests.scala b/weepickle-tests/src/test/scala/com/rallyhealth/weepickle/v1/DefaultsTests.scala
@@ -2,6 +2,7 @@ package com.rallyhealth.weepickle.v1
 
 import com.rallyhealth.weejson.v1.jackson.{FromJson, ToJson}
 import com.rallyhealth.weepickle.v1.WeePickle.{FromScala, ToScala}
+import com.rallyhealth.weepickle.v1.core.FromInput
 import com.rallyhealth.weepickle.v1.implicits.dropDefault
 import utest._
 
@@ -111,3 +112,27 @@ object OptionTopDropDefaultTests extends TestSuite {
   }
 }
 
+// Exercises com.rallyhealth.weepickle.v1.LowPriorityImplicits.FromFromInput
+object FromInputStringTests extends TestSuite {
+
+  case class A(d: String)
+  implicit val pickler = WeePickle.macroFromTo[A]
+
+  override val tests: Tests = Tests {
+    test("write default FromInput")(
+      {
+        val fromInput: FromInput = FromScala(A(null))
+        FromScala(fromInput).transform(ToJson.string)
+      } ==> """{"d":null}""")
+    test("write non-default FromInput")(
+      {
+        val fromInput: FromInput = FromScala(A("omg"))
+        FromScala(fromInput).transform(ToJson.string)
+      } ==> """{"d":"omg"}""")
+    test("write null FromInput")(
+      {
+        val fromInput: FromInput = FromScala(A(null))
+        FromScala(fromInput).transform(ToJson.string)
+      } ==> """{"d":null}""")
+  }
+}
diff --git a/weepickle/src/main/scala/com/rallyhealth/weepickle/v1/LowPriorityImplicits.scala b/weepickle/src/main/scala/com/rallyhealth/weepickle/v1/LowPriorityImplicits.scala
@@ -1,11 +1,17 @@
 package com.rallyhealth.weepickle.v1
 
+import com.rallyhealth.weepickle.v1.core.{FromInput, Visitor}
+
 import java.time.ZonedDateTime
 import java.util.concurrent.ConcurrentHashMap
 
 abstract class LowPriorityImplicits
   extends AttributeTagged {
 
+  implicit val FromFromInput = new From[FromInput] {
+    override def transform0[Out](in: FromInput, out: Visitor[_, Out]): Out = in.transform(out)
+  }
+
   implicit val FromZonedDateTime: From[ZonedDateTime] = FromString.comap[ZonedDateTime](_.toString)
   implicit val ToZonedDateTime: To[ZonedDateTime] = new MapStringTo(s => ZonedDateTime.parse(s.toString))