Signup supports using an existing identity

app/models/signup.rb

@@ -3,22 +3,27 @@ class Signup
   include ActiveModel::Attributes
   include ActiveModel::Validations
 
-  attribute :full_name, :string
-  attribute :email_address, :string
-  attribute :password, :string
-  attribute :company_name, :string
+  # Input attribute
+  attr_accessor :company_name
 
-  attr_reader :signal_identity, :queenbee_account, :signal_account, :account, :user
+  # Input attributes when not using an existing identity
+  attr_accessor :full_name, :email_address, :password
+
+  # Input attribute when using an existing identity, output when creating new identity
+  attr_accessor :signal_identity
+
+  # Output attributes
+  attr_reader :queenbee_account, :signal_account, :account, :user
 
   validate :validate_new_identity
 
   def initialize(...)
-    super
-
     @signal_identity = nil
     @queenbee_account = nil
     @account = nil
     @user = nil
+
+    super
   end
 
   def process
@@ -41,8 +46,10 @@ class Signup
 
   private
     def create_signal_identity
-      SignalId::Database.on_master do
-        @signal_identity = build_new_identity.tap(&:save!)
+      unless signal_identity.present?
+        SignalId::Database.on_master do
+          @signal_identity = build_new_identity.tap(&:save!)
+        end
       end
     end
 
@@ -82,9 +89,11 @@ class Signup
     end
 
     def validate_new_identity
-      build_new_identity.tap do |identity|
-        unless identity.valid?
-          identity.errors.each { |error| errors.add(error.attribute, error.message) }
+      unless signal_identity.present?
+        build_new_identity.tap do |identity|
+          unless identity.valid?
+            identity.errors.each { |error| errors.add(error.attribute, error.message) }
+          end
         end
       end
     end

test/models/signup_test.rb

@@ -10,7 +10,7 @@ class SignupTest < ActiveSupport::TestCase
     )
   end
 
-  test "#process creates all the necessary objects" do
+  test "#process creates all the necessary objects for a new identity" do
     Account.any_instance.expects(:setup_basic_template).once
 
     assert @signup.process, @signup.errors.full_messages.to_sentence(words_connector: ". ")
@@ -24,12 +24,47 @@ class SignupTest < ActiveSupport::TestCase
 
     assert @signup.signal_account
     assert @signup.signal_account.persisted?
+    assert_equal @signup.signal_identity, @signup.signal_account.owner.identity
 
     assert @signup.account
     assert @signup.account.persisted?
 
     assert @signup.user
     assert @signup.user.persisted?
+    assert_equal @signup.user.signal_user, @signup.signal_account.owner
+
+    assert_includes ApplicationRecord.tenants, @signup.signal_account.subdomain
+  end
+
+  test "#process creates all the necessary objects for an existing identity" do
+    signal_identity = SignalId::Identity.find_by_email_address("david@37signals.com")
+
+    @signup = Signup.new(
+      signal_identity: signal_identity,
+      company_name: "Team LeMans",
+    )
+
+    Account.any_instance.expects(:setup_basic_template).once
+
+    assert @signup.process, @signup.errors.full_messages.to_sentence(words_connector: ". ")
+    assert_empty @signup.errors
+
+    assert @signup.signal_identity
+    assert_equal signal_identity, @signup.signal_identity
+
+    assert @signup.queenbee_account
+    assert @signup.queenbee_account.id
+
+    assert @signup.signal_account
+    assert @signup.signal_account.persisted?
+    assert_equal @signup.signal_identity, @signup.signal_account.owner.identity
+
+    assert @signup.account
+    assert @signup.account.persisted?
+
+    assert @signup.user
+    assert @signup.user.persisted?
+    assert_equal @signup.user.signal_user, @signup.signal_account.owner
 
     assert_includes ApplicationRecord.tenants, @signup.signal_account.subdomain
   end