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diff --git a/spec/support/shared_examples/features/wiki/user_creates_wiki_page_shared_examples.rb b/spec/support/shared_examples/features/wiki/user_creates_wiki_page_shared_examples.rb
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+++ b/spec/support/shared_examples/features/wiki/user_creates_wiki_page_shared_examples.rb
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+# frozen_string_literal: true
+
+# Requires a context containing:
+#   wiki
+#   user
+
+RSpec.shared_examples 'User creates 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 "shows validation error message" do
+      page.within(".wiki-form") do
+        fill_in(:wiki_content, with: "")
+
+        click_on("Create page")
+      end
+
+      expect(page).to have_content("The form contains the following error:").and have_content("Content can't be blank")
+
+      page.within(".wiki-form") do
+        fill_in(:wiki_content, with: "[link test](test)")
+
+        click_on("Create page")
+      end
+
+      expect(page).to have_content("Home").and have_content("link test")
+
+      click_link("link test")
+
+      expect(page).to have_content("Create New Page")
+    end
+
+    it "shows non-escaped link in the pages list" 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(page).to have_link(href: wiki_page_path(wiki, 'one/two/three-test'))
+    end
+
+    it "has `Create home` as a commit message", :js do
+      wait_for_requests
+
+      expect(page).to have_field("wiki[message]", with: "Create home")
+    end
+
+    it "creates a page from the home page" do
+      fill_in(:wiki_content, with: "[test](test)\n[GitLab API doc](api)\n[Rake tasks](raketasks)\n# Wiki header\n")
+      fill_in(:wiki_message, with: "Adding links to wiki")
+
+      page.within(".wiki-form") do
+        click_button("Create page")
+      end
+
+      expect(current_path).to eq(wiki_page_path(wiki, "home"))
+      expect(page).to have_content("test GitLab API doc Rake tasks Wiki header")
+                  .and have_content("Home")
+                  .and have_content("Last edited by #{user.name}")
+                  .and have_header_with_correct_id_and_link(1, "Wiki header", "wiki-header")
+
+      click_link("test")
+
+      expect(current_path).to eq(wiki_page_path(wiki, "test"))
+
+      page.within(:css, ".nav-text") do
+        expect(page).to have_content("Create New Page")
+      end
+
+      click_link("Home")
+
+      expect(current_path).to eq(wiki_page_path(wiki, "home"))
+
+      click_link("GitLab API")
+
+      expect(current_path).to eq(wiki_page_path(wiki, "api"))
+
+      page.within(:css, ".nav-text") do
+        expect(page).to have_content("Create")
+      end
+
+      click_link("Home")
+
+      expect(current_path).to eq(wiki_page_path(wiki, "home"))
+
+      click_link("Rake tasks")
+
+      expect(current_path).to eq(wiki_page_path(wiki, "raketasks"))
+
+      page.within(:css, ".nav-text") do
+        expect(page).to have_content("Create")
+      end
+    end
+
+    it "creates ASCII wiki with LaTeX blocks", :js do
+      stub_application_setting(plantuml_url: "http://localhost", plantuml_enabled: true)
+
+      ascii_content = <<~MD
+        :stem: latexmath
+
+        [stem]
+        ++++
+        \\sqrt{4} = 2
+        ++++
+
+        another part
+
+        [latexmath]
+        ++++
+        \\beta_x \\gamma
+        ++++
+
+        stem:[2+2] is 4
+      MD
+
+      find("#wiki_format option[value=asciidoc]").select_option
+
+      fill_in(:wiki_content, with: ascii_content)
+
+      page.within(".wiki-form") do
+        click_button("Create page")
+      end
+
+      page.within ".md" do
+        expect(page).to have_selector(".katex", count: 3).and have_content("2+2 is 4")
+      end
+    end
+
+    it 'creates a wiki page with Org markup', :aggregate_failures do
+      org_content = <<~ORG
+        * Heading
+        ** Subheading
+        [[home][Link to Home]]
+      ORG
+
+      page.within('.wiki-form') do
+        find('#wiki_format option[value=org]').select_option
+        fill_in(:wiki_content, with: org_content)
+        click_button('Create page')
+      end
+
+      expect(page).to have_selector('h1', text: 'Heading')
+      expect(page).to have_selector('h2', text: 'Subheading')
+      expect(page).to have_link(href: wiki_page_path(wiki, 'home'))
+    end
+
+    it_behaves_like 'wiki file attachments'
+  end
+
+  context "when wiki is not empty", :js do
+    before do
+      create(:wiki_page, wiki: wiki, title: 'home', content: 'Home page')
+
+      visit wiki_path(wiki)
+    end
+
+    context "via the `new wiki page` page" do
+      it "creates a page with a single word" do
+        click_link("New page")
+
+        page.within(".wiki-form") do
+          fill_in(:wiki_title, with: "foo")
+          fill_in(:wiki_content, with: "My awesome wiki!")
+        end
+
+        # Commit message field should have correct value.
+        expect(page).to have_field("wiki[message]", with: "Create foo")
+
+        click_button("Create page")
+
+        expect(page).to have_content("foo")
+                    .and have_content("Last edited by #{user.name}")
+                    .and have_content("My awesome wiki!")
+      end
+
+      it "creates a page with spaces in the name" do
+        click_link("New page")
+
+        page.within(".wiki-form") do
+          fill_in(:wiki_title, with: "Spaces in the name")
+          fill_in(:wiki_content, with: "My awesome wiki!")
+        end
+
+        # Commit message field should have correct value.
+        expect(page).to have_field("wiki[message]", with: "Create Spaces in the name")
+
+        click_button("Create page")
+
+        expect(page).to have_content("Spaces in the name")
+                    .and have_content("Last edited by #{user.name}")
+                    .and have_content("My awesome wiki!")
+      end
+
+      it "creates a page with hyphens in the name" do
+        click_link("New page")
+
+        page.within(".wiki-form") do
+          fill_in(:wiki_title, with: "hyphens-in-the-name")
+          fill_in(:wiki_content, with: "My awesome wiki!")
+        end
+
+        # Commit message field should have correct value.
+        expect(page).to have_field("wiki[message]", with: "Create hyphens in the name")
+
+        page.within(".wiki-form") do
+          fill_in(:wiki_content, with: "My awesome wiki!")
+
+          click_button("Create page")
+        end
+
+        expect(page).to have_content("hyphens in the name")
+                    .and have_content("Last edited by #{user.name}")
+                    .and have_content("My awesome wiki!")
+      end
+    end
+
+    it "shows the emoji autocompletion dropdown" do
+      click_link("New page")
+
+      page.within(".wiki-form") do
+        find("#wiki_content").native.send_keys("")
+
+        fill_in(:wiki_content, with: ":")
+      end
+
+      expect(page).to have_selector(".atwho-view")
+    end
+  end
+end