added tests

test/integration/api/v1/auctions/update_test.rb

@@ -28,7 +28,7 @@ class ApiV1AuctionUpdateTest < ActionDispatch::IntegrationTest
     assert_equal ({ 'id' => '1b3ee442-e8fe-4922-9492-8fcb9dccc69c',
                     'domain' => 'auction.test',
                     'status' => Auction.statuses[:awaiting_payment],
-                    'platform' => nil }), ActiveSupport::JSON.decode(response.body)
+                    'platform' => "auto" }), ActiveSupport::JSON.decode(response.body)
   end
 
   def test_marks_as_awaiting_payment

test/models/auction_test.rb

@@ -131,6 +131,49 @@ class AuctionTest < ActiveSupport::TestCase
     assert_not @auction.domain_registrable?('')
   end
 
+  def test_restart_new_auction_should_with_previous_manual_platform
+    @auction.update(platform: 'manual')
+    @auction.reload
+
+    assert_equal @auction.platform, 'manual'
+
+    assert_difference 'Auction.count' do
+      @auction.restart
+    end
+
+    new_auction = Auction.last
+    assert_equal new_auction.platform, 'manual'
+  end
+
+  def test_restart_new_auction_should_with_previous_auto_platform
+    @auction.update(platform: 'auto')
+    @auction.reload
+
+    assert_equal @auction.platform, 'auto'
+
+    assert_difference 'Auction.count' do
+      @auction.restart
+    end
+
+    new_auction = Auction.last
+    assert_equal new_auction.platform, 'auto'
+  end
+
+  def test_restart_new_auction_should_with_auto_if_platform_is_nil
+    @auction.update(platform: nil)
+    @auction.reload
+
+    assert_nil @auction.platform
+
+    assert_difference 'Auction.count' do
+      @auction.restart
+    end
+
+    new_auction = Auction.last
+    assert_equal new_auction.platform, 'auto'
+  end
+
+
   def test_restarts_an_auction
     assert_equal 'auction.test', @auction.domain