Use Current association in AccountsController and add tests (#298)

* Add PagesControllerTest with authentication

* Rubocop fixes

* Move sign_in to setup block

* Remove instance variable

* Add tests for AccountsController

* Use specific account

app/controllers/accounts_controller.rb

@@ -17,7 +17,7 @@ class AccountsController < ApplicationController
   end
 
   def create
-    @account = Account.new(account_params.merge(family: Current.family))
+    @account = Current.family.accounts.build(account_params)
     @account.accountable = account_params[:accountable_type].constantize.new
 
     if @account.save

test/controllers/accounts_controller_test.rb

@@ -0,0 +1,25 @@
+require "test_helper"
+
+class AccountsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in @user = users(:bob)
+    @account = accounts(:dylan_checking)
+  end
+
+  test "new" do
+    get new_account_path
+    assert_response :ok
+  end
+
+  test "show" do
+    get account_path(@account)
+    assert_response :ok
+  end
+
+  test "create" do
+    assert_difference -> { Account.count }, +1 do
+      post accounts_path, params: { account: { accountable_type: "Account::Credit" } }
+      assert_redirected_to accounts_url
+    end
+  end
+end