Account: Composition to handle User and its identities

We have a lot of things that act upon a user record and one or more of it's identities at the same time:
* Sing up: Create a user and it's initial identity
* Rename:  Change the username and create a new identity, turn old into an alias
* Cancel Account: Remove user and all their identities.

In order to keep the User and Identity behaviour isolated but still have a this logic represented in a sinle place the Account model deals with all these things.

We could have overwritten the User#create, User#update and User#destroy methods instead. But then we would always create identities, even if we only need a user (for example in tests).

1 files changed, 45 insertions, 0 deletions

diff --git a/users/test/unit/account_test.rb b/users/test/unit/account_test.rb
new file mode 100644
index 0000000..39969c0
--- /dev/null
+++ b/users/test/unit/account_test.rb
@@ -0,0 +1,45 @@
+require 'test_helper'
+
+class AccountTest < ActiveSupport::TestCase
+
+  test "create a new account" do
+    user = Account.create(FactoryGirl.attributes_for(:user))
+    assert user.valid?
+    assert user.persisted?
+    assert id = user.identity
+    assert_equal user.email_address, id.address
+    assert_equal user.email_address, id.destination
+    id.destroy
+    user.destroy
+  end
+
+  test "create and remove a user account" do
+    assert_no_difference "Identity.count" do
+      assert_no_difference "User.count" do
+        user = Account.create(FactoryGirl.attributes_for(:user))
+        Account.new(user).destroy
+      end
+    end
+  end
+
+  test "change username and create alias" do
+    user = Account.create(FactoryGirl.attributes_for(:user))
+    old_id = user.identity
+    old_email = user.email_address
+    Account.new(user).update(FactoryGirl.attributes_for(:user))
+    user.reload
+    old_id.reload
+    assert user.valid?
+    assert user.persisted?
+    assert id = user.identity
+    assert id.persisted?
+    assert_equal user.email_address, id.address
+    assert_equal user.email_address, id.destination
+    assert_equal user.email_address, old_id.destination
+    assert_equal old_email, old_id.address
+    old_id.destroy
+    id.destroy
+    user.destroy
+  end
+
+end