Record and show last used date of SSH Keys

Addresses: Issue #13810

1. Adds a last_used_at attribute to the Key table/model
2. Update a key's last_used_at whenever it gets used
3. Display how long ago an ssh key was last used

1 files changed, 23 insertions, 0 deletions

diff --git a/spec/workers/use_key_worker_spec.rb b/spec/workers/use_key_worker_spec.rb
new file mode 100644
index 00000000000..e50c788b82a
--- /dev/null
+++ b/spec/workers/use_key_worker_spec.rb
@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+describe UseKeyWorker do
+  describe "#perform" do
+    it "updates the key's last_used_at attribute to the current time when it exists" do
+      worker = described_class.new
+      key = create(:key)
+      current_time = Time.zone.now
+
+      Timecop.freeze(current_time) do
+        expect { worker.perform(key.id) }
+          .to change { key.reload.last_used_at }.from(nil).to be_like_time(current_time)
+      end
+    end
+
+    it "returns false and skips the job when the key doesn't exist" do
+      worker = described_class.new
+      key = create(:key)
+
+      expect(worker.perform(key.id + 1)).to eq false
+    end
+  end
+end