Add tests for Projects::UpdateMirrorService

spec/services/projects/update_mirror_service_spec.rb

+require 'spec_helper'
+
+describe Projects::UpdateMirrorService do
+  let(:project) { create(:project) }
+  let(:repository) { project.repository }
+  let(:mirror_user) { project.owner }
+  subject { described_class.new(project, mirror_user) }
+
+  before do
+    project.import_url = Project::UNKNOWN_IMPORT_URL
+    project.mirror = true
+    project.mirror_user = mirror_user
+    project.save
+  end
+
+  describe "#execute" do
+    it "fetches the upstream repository" do
+      expect(project).to receive(:fetch_mirror)
+
+      subject.execute
+    end
+
+    it "succeeds" do
+      allow(project).to receive(:fetch_mirror) { fetch_mirror(repository) }
+
+      result = subject.execute
+
+      expect(result[:status]).to eq(:success)
+    end
+
+    describe "updating tags" do
+      it "creates new tags" do
+        allow(project).to receive(:fetch_mirror) { fetch_mirror(repository) }
+
+        subject.execute
+
+        expect(repository.tag_names).to include('new-tag')
+      end
+    end
+
+    describe "updating branches" do
+      it "creates new branches" do
+        allow(project).to receive(:fetch_mirror) { fetch_mirror(repository) }
+
+        subject.execute
+
+        expect(repository.branch_names).to include('new-branch')
+      end
+
+      it "updates existing branches" do
+        allow(project).to receive(:fetch_mirror) { fetch_mirror(repository) }
+
+        subject.execute
+
+        expect(repository.find_branch('existing-branch').target).to eq(repository.find_branch('master').target)
+      end
+
+      it "doesn't update diverged branches" do
+        allow(project).to receive(:fetch_mirror) { fetch_mirror(repository) }
+
+        subject.execute
+
+        expect(repository.find_branch('markdown').target).not_to eq(repository.find_branch('master').target)
+      end
+    end
+
+    describe "when the mirror user doesn't have access" do
+      let(:mirror_user) { create(:user) }
+
+      it "fails" do
+        allow(project).to receive(:fetch_mirror) { fetch_mirror(repository) }
+
+        result = subject.execute
+
+        expect(result[:status]).to eq(:error)
+      end
+    end
+  end
+
+  def fetch_mirror(repository)
+    rugged = repository.rugged
+    masterrev = repository.find_branch('master').target
+
+    parentrev = repository.commit(masterrev).parent_id
+    rugged.references.create('refs/heads/existing-branch', parentrev)
+
+    repository.expire_branches_cache
+    repository.branches
+
+    # New branch
+    rugged.references.create('refs/remotes/upstream/new-branch', masterrev)
+
+    # Updated existing branch
+    rugged.references.create('refs/remotes/upstream/existing-branch', masterrev)
+
+    # Diverged branch
+    rugged.references.create('refs/remotes/upstream/markdown', masterrev)
+
+    # New tag
+    rugged.references.create('refs/tags/new-tag', masterrev)
+  end
+end