Add JsValue.asJsObject methods, simplifies JsObject matching

1 files changed, 45 insertions, 0 deletions

diff --git a/src/test/scala/cc/spray/json/CustomFormatSpec.scala b/src/test/scala/cc/spray/json/CustomFormatSpec.scala
new file mode 100644
index 0000000..237e3f4
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+++ b/src/test/scala/cc/spray/json/CustomFormatSpec.scala
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2011 Mathias Doenitz
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cc.spray.json
+
+import org.specs2.mutable.Specification
+
+class CustomFormatSpec extends Specification with DefaultJsonProtocol {
+
+  case class MyType(name: String, value: Int)
+
+  implicit val MyTypeProtocol = new RootJsonFormat[MyType] {
+    def read(json: JsValue) = {
+      json.asJsObject.getFields("name", "value") match {
+        case Seq(JsString(name), JsNumber(value)) => MyType(name, value.toInt)
+        case _ => deserializationError("Expected fields: 'name' (JSON string) and 'value' (JSON number)")
+      }
+    }
+    def write(obj: MyType) = JsObject("name" -> JsString(obj.name), "value" -> JsNumber(obj.value))
+  }
+
+  "A custom JsonFormat built with 'asJsonObject'" should {
+    val value = MyType("bob", 42)
+    "correctly deserialize valid JSON content" in {
+      JsonParser("""{ "name": "bob", "value": 42 }""").convertTo[MyType] mustEqual value
+    }
+    "support full round-trip (de)serialization" in {
+      value.toJson.convertTo[MyType] mustEqual value
+    }
+  }
+
+}
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