Add more storage statistics

This adds counters for build artifacts and LFS objects, and moves
the preexisting repository_size and commit_count from the projects
table into a new project_statistics table.

The counters are displayed in the administration area for projects
and groups, and also available through the API for admins (on */all)
and normal users (on */owned)

The statistics are updated through ProjectCacheWorker, which can now
do more granular updates with the new :statistics argument.

1 files changed, 36 insertions, 0 deletions

diff --git a/spec/models/lfs_objects_project_spec.rb b/spec/models/lfs_objects_project_spec.rb
new file mode 100644
index 00000000000..7bc278e350f
--- /dev/null
+++ b/spec/models/lfs_objects_project_spec.rb
@@ -0,0 +1,36 @@
+require 'spec_helper'
+
+describe LfsObjectsProject, models: true do
+  subject { create(:lfs_objects_project, project: project) }
+  let(:project) { create(:empty_project) }
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:project) }
+    it { is_expected.to belong_to(:lfs_object) }
+  end
+
+  describe 'validation' do
+    it { is_expected.to validate_presence_of(:lfs_object_id) }
+    it { is_expected.to validate_uniqueness_of(:lfs_object_id).scoped_to(:project_id).with_message("already exists in project") }
+
+    it { is_expected.to validate_presence_of(:project_id) }
+  end
+
+  describe '#update_project_statistics' do
+    it 'updates project statistics when the object is added' do
+      expect(ProjectCacheWorker).to receive(:perform_async)
+        .with(project.id, [], [:lfs_objects_size])
+
+      subject.save!
+    end
+
+    it 'updates project statistics when the object is removed' do
+      subject.save!
+
+      expect(ProjectCacheWorker).to receive(:perform_async)
+        .with(project.id, [], [:lfs_objects_size])
+
+      subject.destroy
+    end
+  end
+end