Allow TestHooks::ProjectService to take a project

Signed-off-by: Rémy Coutable <remy@rymai.me>

app/services/test_hooks/project_service.rb

 module TestHooks
   class ProjectService < TestHooks::BaseService
-    private
+    attr_writer :project
 
     def project
       @project ||= hook.project
     end
 
+    private
+
     def push_events_data
       throw(:validation_error, 'Ensure the project has at least one commit.') if project.empty_repo?
 

spec/services/test_hooks/project_service_spec.rb

@@ -6,13 +6,19 @@ describe TestHooks::ProjectService do
   describe '#execute' do
     let(:project) { create(:project, :repository) }
     let(:hook)    { create(:project_hook, project: project) }
+    let(:trigger) { 'not_implemented_events' }
     let(:service) { described_class.new(hook, current_user, trigger) }
     let(:sample_data) { { data: 'sample' } }
     let(:success_result) { { status: :success, http_status: 200, message: 'ok' } }
 
-    context 'hook with not implemented test' do
-      let(:trigger) { 'not_implemented_events' }
+    it 'allows to set a custom project' do
+      project = double
+      service.project = project
+
+      expect(service.project).to eq(project)
+    end
 
+    context 'hook with not implemented test' do
       it 'returns error message' do
         expect(hook).not_to receive(:execute)
         expect(service.execute).to include({ status: :error, message: 'Testing not available for this hook' })