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diff --git a/spec/support/shared_examples/features/wiki/user_updates_wiki_page_shared_examples.rb b/spec/support/shared_examples/features/wiki/user_updates_wiki_page_shared_examples.rb
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+++ b/spec/support/shared_examples/features/wiki/user_updates_wiki_page_shared_examples.rb
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+# frozen_string_literal: true
+
+# Requires a context containing:
+#   wiki
+#   user
+
+RSpec.shared_examples 'User updates wiki page' do
+  include WikiHelpers
+
+  before do
+    sign_in(user)
+  end
+
+  context 'when wiki is empty' do
+    before do |example|
+      visit(wiki_path(wiki))
+
+      wait_for_svg_to_be_loaded(example)
+
+      click_link "Create your first page"
+    end
+
+    it 'redirects back to the home edit page' do
+      page.within(:css, '.wiki-form .form-actions') do
+        click_on('Cancel')
+      end
+
+      expect(current_path).to eq wiki_path(wiki)
+    end
+
+    it 'updates a page that has a path', :js do
+      fill_in(:wiki_title, with: 'one/two/three-test')
+
+      page.within '.wiki-form' do
+        fill_in(:wiki_content, with: 'wiki content')
+        click_on('Create page')
+      end
+
+      expect(current_path).to include('one/two/three-test')
+      expect(find('.wiki-pages')).to have_content('three')
+
+      first(:link, text: 'three').click
+
+      expect(find('[data-testid="wiki_page_title"]')).to have_content('three')
+
+      click_on('Edit')
+
+      expect(current_path).to include('one/two/three-test')
+      expect(page).to have_content('Edit Page')
+
+      fill_in('Content', with: 'Updated Wiki Content')
+      click_on('Save changes')
+
+      expect(page).to have_content('Updated Wiki Content')
+    end
+
+    it_behaves_like 'wiki file attachments'
+  end
+
+  context 'when wiki is not empty' do
+    let!(:wiki_page) { create(:wiki_page, wiki: wiki, title: 'home', content: 'Home page') }
+
+    before do
+      visit(wiki_path(wiki))
+
+      click_link('Edit')
+    end
+
+    it 'updates a page', :js do
+      # Commit message field should have correct value.
+      expect(page).to have_field('wiki[message]', with: 'Update home')
+
+      fill_in(:wiki_content, with: 'My awesome wiki!')
+      click_button('Save changes')
+
+      expect(page).to have_content('Home')
+      expect(page).to have_content("Last edited by #{user.name}")
+      expect(page).to have_content('My awesome wiki!')
+    end
+
+    it 'updates the commit message as the title is changed', :js do
+      fill_in(:wiki_title, with: '& < > \ \ { } &')
+
+      expect(page).to have_field('wiki[message]', with: 'Update & < > \ \ { } &')
+    end
+
+    it 'correctly escapes the commit message entities', :js do
+      fill_in(:wiki_title, with: 'Wiki title')
+
+      expect(page).to have_field('wiki[message]', with: 'Update Wiki title')
+    end
+
+    it 'shows a validation error message' do
+      fill_in(:wiki_content, with: '')
+      click_button('Save changes')
+
+      expect(page).to have_selector('.wiki-form')
+      expect(page).to have_content('Edit Page')
+      expect(page).to have_content('The form contains the following error:')
+      expect(page).to have_content("Content can't be blank")
+      expect(find('textarea#wiki_content').value).to eq('')
+    end
+
+    it 'shows the emoji autocompletion dropdown', :js do
+      find('#wiki_content').native.send_keys('')
+      fill_in(:wiki_content, with: ':')
+
+      expect(page).to have_selector('.atwho-view')
+    end
+
+    it 'shows the error message' do
+      wiki_page.update(content: 'Update') # rubocop:disable Rails/SaveBang
+
+      click_button('Save changes')
+
+      expect(page).to have_content('Someone edited the page the same time you did.')
+    end
+
+    it 'updates a page' do
+      fill_in('Content', with: 'Updated Wiki Content')
+      click_on('Save changes')
+
+      expect(page).to have_content('Updated Wiki Content')
+    end
+
+    it 'cancels editing of a page' do
+      page.within(:css, '.wiki-form .form-actions') do
+        click_on('Cancel')
+      end
+
+      expect(current_path).to eq(wiki_page_path(wiki, wiki_page))
+    end
+
+    it_behaves_like 'wiki file attachments'
+  end
+
+  context 'when the page is in a subdir' do
+    let(:page_name) { 'page_name' }
+    let(:page_dir) { "foo/bar/#{page_name}" }
+    let!(:wiki_page) { create(:wiki_page, wiki: wiki, title: page_dir, content: 'Home page') }
+
+    before do
+      visit wiki_page_path(wiki, wiki_page, action: :edit)
+    end
+
+    it 'moves the page to the root folder' do
+      fill_in(:wiki_title, with: "/#{page_name}")
+
+      click_button('Save changes')
+
+      expect(current_path).to eq(wiki_page_path(wiki, page_name))
+    end
+
+    it 'moves the page to other dir' do
+      new_page_dir = "foo1/bar1/#{page_name}"
+
+      fill_in(:wiki_title, with: new_page_dir)
+
+      click_button('Save changes')
+
+      expect(current_path).to eq(wiki_page_path(wiki, new_page_dir))
+    end
+
+    it 'remains in the same place if title has not changed' do
+      original_path = wiki_page_path(wiki, wiki_page)
+
+      fill_in(:wiki_title, with: page_name)
+
+      click_button('Save changes')
+
+      expect(current_path).to eq(original_path)
+    end
+
+    it 'can be moved to a different dir with a different name' do
+      new_page_dir = "foo1/bar1/new_page_name"
+
+      fill_in(:wiki_title, with: new_page_dir)
+
+      click_button('Save changes')
+
+      expect(current_path).to eq(wiki_page_path(wiki, new_page_dir))
+    end
+
+    it 'can be renamed and moved to the root folder' do
+      new_name = 'new_page_name'
+
+      fill_in(:wiki_title, with: "/#{new_name}")
+
+      click_button('Save changes')
+
+      expect(current_path).to eq(wiki_page_path(wiki, new_name))
+    end
+
+    it 'squishes the title before creating the page' do
+      new_page_dir = "  foo1 /  bar1  /  #{page_name}  "
+
+      fill_in(:wiki_title, with: new_page_dir)
+
+      click_button('Save changes')
+
+      expect(current_path).to eq(wiki_page_path(wiki, "foo1/bar1/#{page_name}"))
+    end
+
+    it_behaves_like 'wiki file attachments'
+  end
+
+  context 'when an existing page exceeds the content size limit' do
+    let!(:wiki_page) { create(:wiki_page, wiki: wiki, content: "one\ntwo\nthree") }
+
+    before do
+      stub_application_setting(wiki_page_max_content_bytes: 10)
+
+      visit wiki_page_path(wiki_page.wiki, wiki_page, action: :edit)
+    end
+
+    it 'allows changing the title if the content does not change' do
+      fill_in 'Title', with: 'new title'
+      click_on 'Save changes'
+
+      expect(page).to have_content('Wiki was successfully updated.')
+    end
+
+    it 'shows a validation error when trying to change the content' do
+      fill_in 'Content', with: 'new content'
+      click_on 'Save changes'
+
+      expect(page).to have_content('The form contains the following error:')
+      expect(page).to have_content('Content is too long (11 Bytes). The maximum size is 10 Bytes.')
+    end
+  end
+end