Merge branch 'registry-700' into registry-694

# Conflicts:
#	db/structure.sql

test/models/epp_session_test.rb

@@ -0,0 +1,63 @@
+require 'test_helper'
+
+class EppSessionTest < ActiveSupport::TestCase
+  def setup
+    @epp_session = epp_sessions(:api_bestnames)
+  end
+
+  def test_valid
+    assert @epp_session.valid?
+  end
+
+  def test_invalid_without_session_id
+    @epp_session.session_id = nil
+    @epp_session.validate
+    assert @epp_session.invalid?
+  end
+
+  def test_invalid_without_user
+    @epp_session.user = nil
+    @epp_session.validate
+    assert @epp_session.invalid?
+  end
+
+  def test_invalid_if_persisted_record_with_the_same_session_id_exists
+    epp_session = EppSession.new(session_id: @epp_session.session_id, user: @epp_session.user)
+    epp_session.validate
+    assert epp_session.invalid?
+  end
+
+  # Having session_id constraints at the database level is crucial
+
+  def test_database_session_id_unique_constraint
+    epp_session = EppSession.new(session_id: @epp_session.session_id, user: @epp_session.user)
+
+    assert_raises ActiveRecord::RecordNotUnique do
+      epp_session.save(validate: false)
+    end
+  end
+
+  def test_database_session_id_not_null_constraint
+    @epp_session.session_id = nil
+    assert_raises ActiveRecord::StatementInvalid do
+      @epp_session.save(validate: false)
+    end
+  end
+
+  def test_limit_per_registrar
+    assert_equal 4, EppSession.limit_per_registrar
+  end
+
+  def test_limit_is_per_registrar
+    travel_to Time.zone.parse('2010-07-05')
+    EppSession.delete_all
+
+    EppSession.limit_per_registrar.times do
+      EppSession.create!(session_id: SecureRandom.hex,
+                         user: users(:api_goodnames),
+                         updated_at: Time.zone.parse('2010-07-05'))
+    end
+
+    refute EppSession.limit_reached?(registrars(:bestnames))
+  end
+end