```ruby
require 'spec_helper'

describe UserObserver do

end
```

Add specs for user observer
user
```ruby
require 'spec_helper'

describe UserObserver do

  describe '#before_validation' do
    let(:user) { build(:user, password: nil) }
    before { user.valid? }
    it { expect(user.password).to_not be_empty }
  end

  describe '#after_create' do
    before { UserObserver.any_instance.unstub(:after_create) }
    context 'when the user is with temporary email' do
      let(:user) { create(:user, email: "change-your-email+#{Time.now.to_i}@neighbor.ly") }
      before { expect_any_instance_of(WelcomeWorker).to_not receive(:perform_async) }
      it { user }
    end

    context 'when the user is not with temporary email' do
      before { expect(WelcomeWorker).to receive(:perform_async) }
      it { create(:user) }
    end
  end

end
```
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