Implement `deactivated?` for deploy tokens

`PolicyActor` has a `deactivated?` method that returns
`false`. However a `DeployToken` can indeed be deactivated.

app/models/deploy_token.rb

@@ -54,6 +54,10 @@ class DeployToken < ApplicationRecord
     !revoked && !expired?
   end
 
+  def deactivated?
+    !active?
+  end
+
   def scopes
     AVAILABLE_SCOPES.select { |token_scope| read_attribute(token_scope) }
   end

spec/models/deploy_token_spec.rb

@@ -124,6 +124,39 @@ RSpec.describe DeployToken do
     end
   end
 
+  # override the default PolicyActor implementation that always returns false
+  describe "#deactivated?" do
+    context "when it has been revoked" do
+      it 'returns true' do
+        deploy_token.revoke!
+
+        expect(deploy_token.deactivated?).to be_truthy
+      end
+    end
+
+    context "when it hasn't been revoked and is not expired" do
+      it 'returns false' do
+        expect(deploy_token.deactivated?).to be_falsy
+      end
+    end
+
+    context "when it hasn't been revoked and is expired" do
+      it 'returns false' do
+        deploy_token.update_attribute(:expires_at, Date.today - 5.days)
+
+        expect(deploy_token.deactivated?).to be_truthy
+      end
+    end
+
+    context "when it hasn't been revoked and has no expiry" do
+      let(:deploy_token) { create(:deploy_token, expires_at: nil) }
+
+      it 'returns false' do
+        expect(deploy_token.deactivated?).to be_falsy
+      end
+    end
+  end
+
   describe '#username' do
     context 'persisted records' do
       it 'returns a default username if none is set' do