Add registrant api companies endpoint

test/integration/api/registrant/registrant_api_companies_test.rb

@@ -0,0 +1,35 @@
+require 'test_helper'
+require 'auth_token/auth_token_creator'
+
+class RegistrantApiCompaniesTest < ApplicationIntegrationTest
+  def setup
+    super
+
+    @contact = contacts(:john)
+    @user = users(:registrant)
+    @auth_headers = { 'HTTP_AUTHORIZATION' => auth_token }
+  end
+
+  def test_root_accepts_limit_and_offset_parameters
+    contacts(:william).update!(ident: '1234', ident_type: 'priv', ident_country_code: 'US')
+    assert_equal 4, @user.contacts(representable: false).size
+
+    get '/api/v1/registrant/companies', params: { 'limit' => 1, 'offset' => 0 },
+        headers: @auth_headers
+    response_json = JSON.parse(response.body, symbolize_names: true)
+    assert_equal(200, response.status)
+    assert_equal(1, response_json.count)
+
+    get '/api/v1/registrant/companies', headers: @auth_headers
+    response_json = JSON.parse(response.body, symbolize_names: true)
+    assert_equal(@user.companies.size, response_json.count)
+  end
+
+  private
+
+  def auth_token
+    token_creator = AuthTokenCreator.create_with_defaults(@user)
+    hash = token_creator.token_in_hash
+    "Bearer #{hash[:access_token]}"
+  end
+end