diff --git a/app/models/external_person.rb b/app/models/external_person.rb
index 2f4df6f..0e972b6 100644
--- a/app/models/external_person.rb
+++ b/app/models/external_person.rb
@@ -6,6 +6,8 @@ class ExternalPerson < ActiveRecord::Base
 
   validates_uniqueness_of :identifier, scope: :source
 
+  validates_presence_of :source, :email, :created_at
+
   attr_accessible :source, :email, :created_at
 
   def self.get_or_create(webfinger)
@@ -74,6 +76,24 @@ class ExternalPerson < ActiveRecord::Base
     Profile.none
   end
 
+  def tasks
+    Task.none
+  end
+
+  def suggested_profiles
+    ProfileSuggestion.none
+  end
+  def suggested_people
+    ProfileSuggestion.none
+  end
+  def suggested_communities
+    ProfileSuggestion.none
+  end
+
+  def add_friend(friend, group = nil)
+    false
+  end
+
   def follows?(profile)
     false
   end
@@ -96,6 +116,8 @@ class ExternalPerson < ActiveRecord::Base
     end
 
     def content_type
+      # This is not really going to be used anywhere that matters
+      # so we are hardcodding it here.
       'image/png'
     end
   end
diff --git a/test/unit/external_person_test.rb b/test/unit/external_person_test.rb
new file mode 100644
index 0000000..fe6c127
--- /dev/null
+++ b/test/unit/external_person_test.rb
@@ -0,0 +1,104 @@
+# encoding: UTF-8
+require_relative "../test_helper"
+
+class PersonTest < ActiveSupport::TestCase
+  fixtures :environments
+
+  def setup
+    @external_person = ExternalPerson.create!(identifier: 'johnlock',
+                                     name: 'John Lock',
+                                     source: 'anerenvironment.org',
+                                     email: 'john@lock.org',
+                                     created_at: Date.yesterday
+                                    )
+  end
+
+  should 'have no permissions' do
+    assert_equivalent [], @external_person.role_assignments
+    refute @external_person.has_permission?(:manage_friends)
+  end
+
+  should 'have no suggested profiles' do
+    assert_equivalent [], @external_person.suggested_communities
+    assert_equivalent [], @external_person.suggested_people
+    assert_equivalent [], @external_person.suggested_profiles
+  end
+
+  should 'have no friendships' do
+    refute @external_person.add_friend(fast_create(Person))
+    assert_equivalent [], @external_person.friendships
+  end
+
+  should 'not be a member of any communities' do
+    community = fast_create(Community)
+    refute community.add_member(@external_person)
+    assert_equivalent [], @external_person.memberships
+  end
+
+  should 'not have any favorite enterprises' do
+    assert_equivalent [], @external_person.favorite_enterprises
+  end
+
+  should 'be a person' do
+    assert @external_person.person?
+  end
+
+  should 'not be a community, organization or enterprise' do
+    refute @external_person.community?
+    refute @external_person.enterprise?
+    refute @external_person.organization?
+  end
+
+  should 'never be an admin for environments' do
+    refute @external_person.is_admin?
+    env = Environment.default
+    env.add_admin @external_person
+    refute @external_person.is_admin?(env)
+    assert_equivalent [], env.admins
+  end
+
+  should 'redirect after login based on environment settings' do
+    assert_respond_to ExternalPerson.new, :preferred_login_redirection
+    environment = fast_create(Environment, :redirection_after_login => 'site_homepage')
+    profile = fast_create(ExternalPerson, :environment_id => environment.id)
+    assert_equal 'site_homepage', profile.preferred_login_redirection
+  end
+
+  should 'have an avatar from its original environment' do
+    assert_match /http:\/\/#{@external_person.source}\/.*/, @external_person.avatar
+  end
+
+  should 'generate a custom profile icon based on its avatar' do
+  end
+
+  should 'have an url to its profile on its original environment' do
+  end
+
+  should 'have a public profile url' do
+  end
+
+  should 'have an admin url to its profile on its original environment' do
+  end
+
+  should 'respond to lat and lng' do
+    assert_respond_to ExternalPerson.new, :lat
+    assert_respond_to ExternalPerson.new, :lng
+    assert_nil @external_person.lat
+    assert_nil @external_person.lng
+  end
+
+  should 'never be a friend of another person' do
+  end
+
+  should 'never send a friend request to another person' do
+  end
+
+  should 'not follow another profile' do
+  end
+
+  should 'have an image' do
+  end
+
+  should 'profile image has public filename and mimetype' do
+  end
+end
diff --git a/test/unit/external_user_test.rb b/test/unit/external_user_test.rb
new file mode 100644
index 0000000..3604637
--- /dev/null
+++ b/test/unit/external_user_test.rb
@@ -0,0 +1,10 @@
+# encoding: UTF-8
+require_relative "../test_helper"
+
+class ExternalUserTest < ActiveSupport::TestCase
+  # Be sure to include AuthenticatedTestHelper in test/test_helper.rb instead.
+  # Then, you can remove it from this and the functional test.
+  include AuthenticatedTestHelper
+  fixtures :users, :environments
+
+end
--
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