Add test for low-priority implicits when chained

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/src/main/scala/tests.scala b/tests/src/main/scala/tests.scala
index a6e32d4..e275dee 100644
--- a/tests/src/main/scala/tests.scala
+++ b/tests/src/main/scala/tests.scala
@@ -20,6 +20,7 @@ case class Address(line1: String, occupant: Person)
 
 class Length(val value: Int) extends AnyVal
 
+case class FruitBasket(fruits: Fruit*)
 case class Lunchbox(fruit: Fruit, drink: String)
 object Fruit {
   import examples._
@@ -105,6 +106,12 @@ object Tests extends TestApp {
       implicitly[Show[String, Fruit]].show(Fruit("apple"))
     }.assert(_ == "Fruit(name=apple)")
 
+    test("low-priority implicit does not beat Magnolia when chained") {
+      import magnolia.examples._
+      import Show.gen
+      implicitly[Show[String, FruitBasket]].show(FruitBasket(Fruit("apple"), Fruit("banana")))
+    }.assert(_ == "FruitBasket(fruits=[Fruit(name=apple),Fruit(name=banana)])")
+
     test("typeclass implicit scope has lower priority than ADT implicit scope") {
       import magnolia.examples._
       implicitly[Show[String, Fruit]].show(Fruit("apple"))