1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/scala/cc/spray/json/ProductFormatsSpec.scala b/src/test/scala/cc/spray/json/ProductFormatsSpec.scala
new file mode 100644
index 0000000..5f253c2
--- /dev/null
+++ b/src/test/scala/cc/spray/json/ProductFormatsSpec.scala
@@ -0,0 +1,31 @@
+package cc.spray.json
+
+import org.specs.Specification
+
+class ProductFormatsSpec extends Specification with DefaultJsonProtocol {
+
+  case class Test2(a: Int, b: Double)
+  implicit val test2Format = jsonFormat(Test2, "a", "b") 
+  
+  "A JsonFormat created with format, for a case class with 2 elements," should {
+    val obj = Test2(42, 4.2)
+    val json = JsObject(JsField("a", 42), JsField("b", 4.2))
+    "convert to a respective JsObject" in {
+      obj.toJson mustEqual json
+    }
+    "convert a JsObject to the respective case class instance" in {
+      json.fromJson[Test2] mustEqual obj 
+    }
+    "throw a DeserializationException if the JsObject does not define the right members" in (
+      JsObject(JsField("a", 42), JsField("x", 4.2)).fromJson[Test2] must
+              throwA(new DeserializationException("Object is missing required member 'b'"))  
+    )
+    "ignore additional members during deserialization" in {
+      JsObject(JsField("a", 42), JsField("b", 4.2), JsField("c", 'no)).fromJson[Test2] mustEqual obj 
+    }
+    "throw a DeserializationException if the JsValue is not a JsObject" in (
+      JsNull.fromJson[Test2] must throwA(new DeserializationException("Object expected"))  
+    )
+  }
+  
+}