Add correct test case

Author: abelino

protocol/test/list.ex

@@ -2,5 +2,4 @@ struct TestSchema.List
 
 name "list"
 
-attribute :device_ids, [:integer], min: 1,        max: 10
-attribute :statuses,   [:string],  optional: true
+attribute :device_ids, [:integer], min: 1, max: 10

protocol/test/optional_map_list.ex

@@ -0,0 +1,10 @@
+struct TestSchema.OptionalMapList
+
+name "optional_map_list"
+
+attribute :status, :atom, values: [:pending, :failed]
+
+attribute [:transactions], optional: true do
+  attribute :id,     :integer
+  attribute :amount, :integer
+end

test/speck_test.exs

@@ -128,13 +128,13 @@ defmodule Speck.Test do
 
   test "return nil if optional list is not present" do
     params = %{
-      "device_ids" => [1, 2, 3],
+      "status" => "failed",
     }
 
-    assert Speck.validate(TestSchema.List, params) ==
-      {:ok, %TestSchema.List{
-        device_ids: [1, 2, 3],
-        statuses: nil
+    assert Speck.validate(TestSchema.OptionalMapList, params) ==
+      {:ok, %TestSchema.OptionalMapList{
+        status: :failed,
+        transactions: nil,
       }}
   end