From 5ef502abc058358ec3a329c774bb42b9a7bd106f Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jakob@odersky.com>
Date: Thu, 8 Mar 2018 16:13:03 -0800
Subject: Don't ake derived formats implicit by default

---
 src/test/scala/ProductTypeFormatTests.scala | 79 +++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 src/test/scala/ProductTypeFormatTests.scala

(limited to 'src/test/scala/ProductTypeFormatTests.scala')

diff --git a/src/test/scala/ProductTypeFormatTests.scala b/src/test/scala/ProductTypeFormatTests.scala
new file mode 100644
index 0000000..b7d8d27
--- /dev/null
+++ b/src/test/scala/ProductTypeFormatTests.scala
@@ -0,0 +1,79 @@
+package xyz.driver.json
+
+import spray.json._
+
+import org.scalatest._
+
+class ProductTypeFormatTests
+    extends FlatSpec
+    with FormatTests
+    with DerivedFormats
+    with DefaultJsonProtocol {
+
+  case class A()
+  case class B(x: Int, b: String, mp: Map[String, Int])
+  case class C(b: B)
+  case object D
+  case class E(d: D.type)
+  case class F(x: Int)
+  case class G(f: F)
+
+  implicit val aFormat: RootJsonFormat[A] = jsonFormat[A]
+  implicit val bFormat: RootJsonFormat[B] = jsonFormat[B]
+  implicit val cFormat: RootJsonFormat[C] = jsonFormat[C]
+  implicit val dFormat: RootJsonFormat[D.type] = jsonFormat[D.type]
+  implicit val eFormat: RootJsonFormat[E] = jsonFormat[E]
+
+  "No-parameter product" should behave like checkRoundtrip(A(), "{}")
+
+  "Simple parameter product" should behave like checkRoundtrip(
+    B(42, "Hello World", Map("a" -> 1, "b" -> -1024)),
+    """{ "x": 42, "b": "Hello World", "mp": { "a": 1, "b": -1024 } }"""
+  )
+
+  "Nested parameter product" should behave like checkRoundtrip(
+    C(B(42, "Hello World", Map("a" -> 1, "b" -> -1024))),
+    """{"b" :{ "x": 42, "b": "Hello World", "mp": { "a": 1, "b": -1024 } } }"""
+  )
+
+  "Case object" should behave like checkRoundtrip(
+    D,
+    "{}"
+  )
+
+  "Case object as parameter" should behave like checkRoundtrip(
+    E(D),
+    """{"d":{}}"""
+  )
+
+  // custom format for F, that inverts the value of parameter x
+  implicit val fFormat: RootJsonFormat[F] = new RootJsonFormat[F] {
+    override def write(f: F): JsValue = JsObject("y" -> f.x.toJson)
+    override def read(js: JsValue): F =
+      F(js.asJsObject.fields("y").convertTo[Int])
+  }
+
+  "Overriding with a custom format" should behave like checkRoundtrip(
+    F(2),
+    """{"y":2}"""
+  )
+
+  implicit val gFormat: RootJsonFormat[G] = jsonFormat[G]
+
+  "Derving a format with a custom child format" should behave like checkRoundtrip(
+    G(F(2)),
+    """{"f": {"y":2}}"""
+  )
+
+  case class H(x: Boolean)
+  case class I(h: H)
+
+  // there is no format defined for H, Magnolia will generate one automatically
+  implicit val iFormat: RootJsonFormat[I] = jsonFormat[I]
+
+  "Deriving a format that has no implicit child formats available" should behave like checkRoundtrip(
+    I(H(true)),
+    """{"h": {"x":true}}"""
+  )
+
+}
-- 
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