Add ContravariantDerivation for cats.Show

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/shared/src/main/scala/magnolia/cats.scala b/tests/shared/src/main/scala/magnolia/cats.scala
new file mode 100644
index 0000000..4a1c096
--- /dev/null
+++ b/tests/shared/src/main/scala/magnolia/cats.scala
@@ -0,0 +1,17 @@
+package magnolia
+
+import examples.{Address, Branch, Country, Entity, Leaf, Person}
+import cats.instances.all._
+import cats.syntax.all._
+import examples.cats.instances._
+import language.experimental.macros
+
+object CatsMain {
+
+  def main(args: Array[String]): Unit = {
+    println(Branch(Branch(Leaf(1, "a"), Leaf(2, "b")), Leaf(3, "c")).show)
+    println(List[Entity](Person("John Smith",
+      Address(List("1 High Street", "London", "SW1A 1AA"),
+        Country("UK", "GBR", false)))).show)
+  }
+}