add base feature specs

spec/system/webhook_settings_spec.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Webhook Settings' do
+  let!(:account) { create(:account) }
+  let!(:user) { create(:user, account:) }
+
+  before do
+    sign_in(user)
+    visit settings_webhooks_path
+  end
+
+  it 'shows webhook settings page' do
+    expect(page).to have_content('Webhooks')
+    expect(page).to have_field('Webhook URL')
+    expect(page).to have_button('Save')
+  end
+
+  it 'updates the webhook URL' do
+    fill_in 'Webhook URL', with: 'https://example.com'
+
+    expect do
+      click_button 'Save'
+    end.to change(EncryptedConfig, :count).by(1)
+
+    encrypted_config = EncryptedConfig.find_by(account:, key: EncryptedConfig::WEBHOOK_URL_KEY)
+
+    expect(encrypted_config.value).to eq('https://example.com')
+  end
+end