Make mock adapter usable for testing

Make adapter configurable and make mock adapter public

lib/shopify/adapters/mock.ex

@@ -3,7 +3,11 @@ defmodule Shopify.Adapters.Mock do
 
   @behaviour Shopify.Adapters.Base
 
-  alias Shopify.{Request, Response}
+  alias Shopify.{
+    Request,
+    Response,
+    Config
+  }
 
   def get(request) do
     request
@@ -50,12 +54,24 @@ defmodule Shopify.Adapters.Mock do
   end
 
   def load_resource(%Request{path: path, body: nil}) do
-    Path.expand("../../../test/fixtures/#{path}", __DIR__)
+    Config.fixtures_path <> "/" <> path
       |> File.read
   end
 
   def load_resource(%Request{body: body}) do
-    {:ok, body}
+    case Poison.decode(body) do
+      {:ok, resource} -> resource |> put_id |> Poison.encode
+      {:error, _} -> {:error, nil}
+    end
+  end
+
+  defp put_id(resource) do
+    key = resource |> Map.keys |> List.first
+    resource
+      |> Map.values
+      |> List.first
+      |> Map.put_new("id", 1)
+      |> (fn parsed -> %{key => parsed} end).()
   end
 
   def authorize(request) do
@@ -74,6 +90,6 @@ defmodule Shopify.Adapters.Mock do
   end
 
   def oauth_auth(_) do
-    
+
   end
-end
+end

lib/shopify/client.ex

@@ -1,13 +1,13 @@
 defmodule Shopify.Client do
   @moduledoc false
 
-  @adapter Shopify.Config.get(:client_adapter) || Shopify.Adapters.HTTP
+  alias Shopify.Config
 
-  def get(request), do: @adapter.get(request)
+  def get(request), do: Config.client_adapter.get(request)
 
-  def post(request), do: @adapter.post(request)
+  def post(request), do: Config.client_adapter.post(request)
 
-  def put(request), do: @adapter.put(request)
+  def put(request), do: Config.client_adapter.put(request)
 
-  def delete(request), do: @adapter.delete(request)
+  def delete(request), do: Config.client_adapter.delete(request)
 end

lib/shopify/config.ex

@@ -1,15 +1,21 @@
 defmodule Shopify.Config do
   @moduledoc false
-  
+
   def get(name, default \\ nil) do
     Application.get_env(:shopify, name, default)
   end
 
+  def client_adapter, do: get(:client_adapter, Shopify.Adapters.HTTP)
+
   def shop_name, do: get(:shop_name)
 
   def api_key, do: get(:api_key)
 
   def password, do: get(:password)
 
   def version, do: Mix.Project.config[:version]
-end
+
+  def fixtures_path do
+    get(:fixtures_path) || Path.expand("../../test/fixtures/", __DIR__)
+  end
+end

test/adapters/mock_test.exs

@@ -0,0 +1,16 @@
+defmodule Shopify.Adapters.Mocktest do
+  use ExUnit.Case, async: true
+
+  alias Shopify.{Webhook, Request, Adapters.Mock}
+
+  test "it puts an id for created resources" do
+    body = "{\"webhook\": {\"address\": \"http://www.yoloship.it/webhook\"}}"
+
+    {:ok, %{data: resource}} = Shopify.session
+      |> Request.new(Webhook.all_url(), %{}, Webhook.singular_resource(), body)
+      |> Mock.post
+
+    assert resource.id != nil
+  end
+
+end