Ticket #5651: Fix code coverage

On Check Api test, the classes are reloaded and this was messing up with
the code coverage. Each time the file was reloaded, it reset the coverage.
This patch merges the results.

Found on simplecov-ruby/simplecov#389

lib/tasks/coverage.rake

@@ -4,6 +4,9 @@ namespace :test do
     SimpleCov.start 'rails' do
       coverage_dir 'public/coverage'
     end
+    SimpleCov.at_exit do
+      SimpleCov.result.format!
+    end
     Rake::Task['test'].execute
   end
 end

test/models/check_api_test.rb

@@ -22,6 +22,11 @@ def setup
     @project_media_without_translation_result = project_media_without_translation_result
   end
 
+  test "should send token as header" do
+    token = BRIDGE_CONFIG['check_api_token']
+    assert_equal token, Check::HTTPAdapter.headers('context')['X-Check-Token']
+  end
+
   test "should return project slug as string representation" do
     assert_equal 'check-api', @check.to_s
   end
@@ -61,6 +66,10 @@ def setup
   private
 
   def reload_classes
+    SimpleCov.result
+    SimpleCov.start do
+      command_name "#{command_name}1"
+    end
     Object.send(:remove_const, :Check) if Module.const_defined?(:Check)
     load File.join(Rails.root, 'lib', 'check_api_client.rb')
     Sources.send(:remove_const, :CheckApi) if Module.const_defined?(:CheckApi)