Create controller test

test/inmana_web/controllers/restaurants_controller_test.exs

@@ -0,0 +1,35 @@
+defmodule InmanaWeb.RestaurantsControllerTest do
+    use InmanaWeb.ConnCase
+
+    describe "create/2" do
+        test "when all params are valid, creates the restaurant", %{conn: connection} do
+            params = %{name: "Restaurant name", email: "[email protected]"}
+
+            response =
+                connection
+                |> post(Routes.restaurants_path(connection, :create, params))
+                |> json_response(:created)
+
+            assert %{
+                    "message" => "Restaurant created!",
+                    "restaurant" => %{
+                        "email" => "[email protected]",
+                        "id" => _id,
+                        "name" => "Restaurant name"
+                    }
+                } = response
+        end
+
+        test "when there are invalid params, returns an error", %{conn: connection} do
+            params = %{email: "[email protected]"}
+            expected_response = %{"message" => %{"name" => ["can't be blank"]}}
+
+            response =
+                connection
+                |> post(Routes.restaurants_path(connection, :create, params))
+                |> json_response(:bad_request)
+
+            assert response == expected_response
+        end
+    end
+end