require 'spec_helper'

describe ProcessCommitWorker do
  include ProjectForksHelper

  let(:worker) { described_class.new }
  let(:user) { create(:user) }
  let(:project) { create(:project, :public, :repository) }
  let(:issue) { create(:issue, project: project, author: user) }
  let(:commit) { project.commit }

  describe '#perform' do
    it 'does not process the commit when the project does not exist' do
      expect(worker).not_to receive(:close_issues)

      worker.perform(-1, user.id, commit.to_hash)
    end

    it 'does not process the commit when the user does not exist' do
      expect(worker).not_to receive(:close_issues)

      worker.perform(project.id, -1, commit.to_hash)
    end

    it 'processes the commit message' do
      expect(worker).to receive(:process_commit_message).and_call_original

      worker.perform(project.id, user.id, commit.to_hash)
    end

    it 'updates the issue metrics' do
      expect(worker).to receive(:update_issue_metrics).and_call_original

      worker.perform(project.id, user.id, commit.to_hash)
    end

    context 'when the project is forked' do
      context 'when commit already exists in the upstream project' do
        it 'does not process the commit message' do
          forked = fork_project(project, user, repository: true)

          expect(worker).not_to receive(:process_commit_message)

          worker.perform(forked.id, user.id, forked.commit.to_hash)
        end
      end

      context 'when the commit does not exist in the upstream project' do
        it 'processes the commit message' do
          empty_project = create(:project, :public)
          forked = fork_project(empty_project, user, repository: true)

          TestEnv.copy_repo(forked,
                            bare_repo: TestEnv.factory_repo_path_bare,
                            refs: TestEnv::BRANCH_SHA)

          expect(worker).to receive(:process_commit_message)

          worker.perform(forked.id, user.id, forked.commit.to_hash)
        end
      end

      context 'when the upstream project no longer exists' do
        it 'processes the commit message' do
          forked = fork_project(project, user, repository: true)
          project.destroy!

          expect(worker).to receive(:process_commit_message)

          worker.perform(forked.id, user.id, forked.commit.to_hash)
        end
      end
    end
  end

  describe '#process_commit_message' do
    context 'when pushing to the default branch' do
      before do
        allow(commit).to receive(:safe_message).and_return("Closes #{issue.to_reference}")
      end

      it 'closes issues that should be closed per the commit message' do
        expect(worker).to receive(:close_issues).with(project, user, user, commit, [issue])

        worker.process_commit_message(project, commit, user, user, true)
      end

      it 'creates cross references' do
        expect(commit).to receive(:create_cross_references!).with(user, [issue])

        worker.process_commit_message(project, commit, user, user, true)
      end
    end

    context 'when pushing to a non-default branch' do
      it 'does not close any issues' do
        allow(commit).to receive(:safe_message).and_return("Closes #{issue.to_reference}")

        expect(worker).not_to receive(:close_issues)

        worker.process_commit_message(project, commit, user, user, false)
      end

      it 'does not create cross references' do
        expect(commit).to receive(:create_cross_references!).with(user, [])

        worker.process_commit_message(project, commit, user, user, false)
      end
    end

    context 'when commit is a merge request merge commit to the default branch' do
      let(:merge_request) do
        create(:merge_request,
               description: "Closes #{issue.to_reference}",
               source_branch: 'feature-merged',
               target_branch: 'master',
               source_project: project)
      end

      let(:commit) do
        project.repository.create_branch('feature-merged', 'feature')

        MergeRequests::MergeService
          .new(project, merge_request.author)
          .execute(merge_request)

        merge_request.reload.merge_commit
      end

      it 'does not close any issues from the commit message' do
        expect(worker).not_to receive(:close_issues)

        worker.process_commit_message(project, commit, user, user, true)
      end

      it 'still creates cross references' do
        expect(commit).to receive(:create_cross_references!).with(user, [])

        worker.process_commit_message(project, commit, user, user, true)
      end
    end
  end

  describe '#close_issues' do
    context 'when the user can update the issues' do
      it 'closes the issues' do
        worker.close_issues(project, user, user, commit, [issue])

        issue.reload

        expect(issue.closed?).to eq(true)
      end
    end

    context 'when the user can not update the issues' do
      it 'does not close the issues' do
        other_user = create(:user)

        worker.close_issues(project, other_user, other_user, commit, [issue])

        issue.reload

        expect(issue.closed?).to eq(false)
      end
    end
  end

  describe '#update_issue_metrics' do
    it 'updates any existing issue metrics' do
      allow(commit).to receive(:safe_message).and_return("Closes #{issue.to_reference}")

      worker.update_issue_metrics(commit, user)

      metric = Issue::Metrics.first

      expect(metric.first_mentioned_in_commit_at).to eq(commit.committed_date)
    end

    it "doesn't execute any queries with false conditions" do
      allow(commit).to receive(:safe_message).and_return("Lorem Ipsum")

      expect { worker.update_issue_metrics(commit, user) }
        .not_to make_queries_matching(/WHERE (?:1=0|0=1)/)
    end
  end

  describe '#build_commit' do
    it 'returns a Commit' do
      commit = worker.build_commit(project, id: '123')

      expect(commit).to be_an_instance_of(Commit)
    end

    it 'parses date strings into Time instances' do
      commit = worker.build_commit(project,
                                   id: '123',
                                   authored_date: Time.now.to_s)

      expect(commit.authored_date).to be_an_instance_of(Time)
    end
  end
end