Move admin application spinach test to rspec

https://gitlab.com/gitlab-org/gitlab-ce/issues/23036

features/admin/applications.feature

-@admin
-Feature: Admin Applications
-  Background:
-    Given I sign in as an admin
-    And I visit applications page
-    
-  Scenario: I can manage application
-    Then I click on new application button
-    And I should see application form
-    Then I fill application form out and submit
-    And I see application
-    Then I click edit
-    And I see edit application form
-    Then I change name of application and submit
-    And I see that application was changed
-    Then I visit applications page
-    And I click to remove application
-    Then I see that application is removed
\ No newline at end of file

features/steps/admin/applications.rb

-class Spinach::Features::AdminApplications < Spinach::FeatureSteps
-  include SharedAuthentication
-  include SharedPaths
-  include SharedAdmin
-
-  step 'I click on new application button' do
-    click_on 'New Application'
-  end
-
-  step 'I should see application form' do
-    expect(page).to have_content "New application"
-  end
-
-  step 'I fill application form out and submit' do
-    fill_in :doorkeeper_application_name, with: 'test'
-    fill_in :doorkeeper_application_redirect_uri, with: 'https://test.com'
-    click_on "Submit"
-  end
-
-  step 'I see application' do
-    expect(page).to have_content "Application: test"
-    expect(page).to have_content "Application Id"
-    expect(page).to have_content "Secret"
-  end
-
-  step 'I click edit' do
-    click_on "Edit"
-  end
-
-  step 'I see edit application form' do
-    expect(page).to have_content "Edit application"
-  end
-
-  step 'I change name of application and submit' do
-    expect(page).to have_content "Edit application"
-    fill_in :doorkeeper_application_name, with: 'test_changed'
-    click_on "Submit"
-  end
-
-  step 'I see that application was changed' do
-    expect(page).to have_content "test_changed"
-    expect(page).to have_content "Application Id"
-    expect(page).to have_content "Secret"
-  end
-
-  step 'I click to remove application' do
-    page.within '.oauth-applications' do
-      click_on "Destroy"
-    end
-  end
-
-  step "I see that application is removed" do
-    expect(page.find(".oauth-applications")).not_to have_content "test_changed"
-  end
-end

features/steps/shared/paths.rb

@@ -207,10 +207,6 @@ module SharedPaths
     visit admin_spam_logs_path
   end
-  step 'I visit applications page' do
-    visit admin_applications_path
-  end
-
   # ----------------------------------------
   # Generic Project
   # ----------------------------------------

spec/features/admin/admin_manage_applications_spec.rb

+require 'spec_helper'
+
+RSpec.describe 'admin manage applications', feature: true do
+  before do
+    login_as :admin
+  end
+
+  it do
+    visit admin_applications_path
+
+    click_on 'New Application'
+    expect(page).to have_content('New application')
+
+    fill_in :doorkeeper_application_name, with: 'test'
+    fill_in :doorkeeper_application_redirect_uri, with: 'https://test.com'
+    click_on 'Submit'
+    expect(page).to have_content('Application: test')
+    expect(page).to have_content('Application Id')
+    expect(page).to have_content('Secret')
+
+    click_on 'Edit'
+    expect(page).to have_content('Edit application')
+
+    fill_in :doorkeeper_application_name, with: 'test_changed'
+    click_on 'Submit'
+    expect(page).to have_content('test_changed')
+    expect(page).to have_content('Application Id')
+    expect(page).to have_content('Secret')
+
+    visit admin_applications_path
+    page.within '.oauth-applications' do
+      click_on 'Destroy'
+    end
+    expect(page.find('.oauth-applications')).not_to have_content('test_changed')
+  end
+end