Add integration tests for Scenario imports

spec/features/scenario_import_spec.rb

@@ -0,0 +1,46 @@
+require 'rails_helper'
+
+describe ScenarioImportsController do
+  let(:user) { users(:bob) }
+
+  before do
+    login_as(user)
+  end
+
+  it 'renders the import form' do
+    visit new_scenario_imports_path
+    expect(page).to have_text('Import a Public Scenario')
+  end
+
+  it 'requires a URL or file uplaod' do
+    visit new_scenario_imports_path
+    click_on 'Start Import'
+    expect(page).to have_text('Please provide either a Scenario JSON File or a Public Scenario URL.')
+  end
+
+  it 'imports a scenario that does not exist yet' do
+    visit new_scenario_imports_path
+    attach_file('Option 2: Upload a Scenario JSON File', File.join(Rails.root, 'data/default_scenario.json'))
+    click_on 'Start Import'
+    expect(page).to have_text('This scenario has a few agents to get you started. Feel free to change them or delete them as you see fit!')
+    expect(page).not_to have_text('This Scenario already exists in your system.')
+    check('I confirm that I want to import these Agents.')
+    click_on 'Finish Import'
+    expect(page).to have_text('Import successful!')
+  end
+
+  it 'asks to accept conflicts when the scenario was modified' do
+    DefaultScenarioImporter.seed(user)
+    agent = user.agents.where(name: 'Rain Notifier').first
+    agent.options['expected_receive_period_in_days'] = 9001
+    agent.save!
+    visit new_scenario_imports_path
+    attach_file('Option 2: Upload a Scenario JSON File', File.join(Rails.root, 'data/default_scenario.json'))
+    click_on 'Start Import'
+    expect(page).to have_text('This Scenario already exists in your system.')
+    expect(page).to have_text('9001')
+    check('I confirm that I want to import these Agents.')
+    click_on 'Finish Import'
+    expect(page).to have_text('Import successful!')
+  end
+end