1 files changed, 110 insertions, 0 deletions
diff --git a/spec/support/shared_examples/features/wiki/user_previews_wiki_changes_shared_examples.rb b/spec/support/shared_examples/features/wiki/user_previews_wiki_changes_shared_examples.rb
new file mode 100644
index 00000000000..a22d98f20c4
--- /dev/null
+++ b/spec/support/shared_examples/features/wiki/user_previews_wiki_changes_shared_examples.rb
@@ -0,0 +1,110 @@
+# frozen_string_literal: true
+
+# Requires a context containing:
+#   wiki
+#   user
+
+RSpec.shared_examples 'User previews wiki changes' do
+  let(:wiki_page) { build(:wiki_page, wiki: wiki) }
+
+  before do
+    sign_in(user)
+  end
+
+  shared_examples 'relative links' do
+    let_it_be(:page_content) do
+      <<~HEREDOC
+        Some text so key event for [ does not trigger an incorrect replacement.
+        [regular link](regular)
+        [relative link 1](../relative)
+        [relative link 2](./relative)
+        [relative link 3](./e/f/relative)
+        [spaced link](title with spaces)
+      HEREDOC
+    end
+
+    def relative_path(path)
+      (Pathname.new(wiki.wiki_base_path) + File.dirname(wiki_page.path).tr(' ', '-') + path).to_s
+    end
+
+    shared_examples "rewrites relative links" do
+      specify do
+        expect(element).to have_link('regular link',    href: wiki.wiki_base_path + '/regular')
+        expect(element).to have_link('spaced link',     href: wiki.wiki_base_path + '/title%20with%20spaces')
+
+        expect(element).to have_link('relative link 1', href: relative_path('../relative'))
+        expect(element).to have_link('relative link 2', href: relative_path('./relative'))
+        expect(element).to have_link('relative link 3', href: relative_path('./e/f/relative'))
+      end
+    end
+
+    context "when there are no spaces or hyphens in the page name" do
+      let(:wiki_page) { build(:wiki_page, wiki: wiki, title: 'a/b/c/d', content: page_content) }
+
+      it_behaves_like 'rewrites relative links'
+    end
+
+    context "when there are spaces in the page name" do
+      let(:wiki_page) { build(:wiki_page, wiki: wiki, title: 'a page/b page/c page/d page', content: page_content) }
+
+      it_behaves_like 'rewrites relative links'
+    end
+
+    context "when there are hyphens in the page name" do
+      let(:wiki_page) { build(:wiki_page, wiki: wiki, title: 'a-page/b-page/c-page/d-page', content: page_content) }
+
+      it_behaves_like 'rewrites relative links'
+    end
+  end
+
+  context "when rendering a new wiki page", :js do
+    before do
+      wiki_page.create # rubocop:disable Rails/SaveBang
+      visit wiki_page_path(wiki, wiki_page)
+    end
+
+    it_behaves_like 'relative links' do
+      let(:element) { page.find('[data-testid="wiki_page_content"]') }
+    end
+  end
+
+  context "when previewing an existing wiki page", :js do
+    let(:preview) { page.find('.md-preview-holder') }
+
+    before do
+      wiki_page.create # rubocop:disable Rails/SaveBang
+      visit wiki_page_path(wiki, wiki_page, action: :edit)
+    end
+
+    it_behaves_like 'relative links' do
+      before do
+        click_on 'Preview'
+      end
+
+      let(:element) { preview }
+    end
+
+    it 'renders content with CommonMark' do
+      fill_in :wiki_content, with: "1. one\n  - sublist\n"
+      click_on "Preview"
+
+      # the above generates two separate lists (not embedded) in CommonMark
+      expect(preview).to have_content("sublist")
+      expect(preview).not_to have_xpath("//ol//li//ul")
+    end
+
+    it "does not linkify double brackets inside code blocks as expected" do
+      fill_in :wiki_content, with: <<-HEREDOC
+        `[[do_not_linkify]]`
+        ```
+        [[also_do_not_linkify]]
+        ```
+      HEREDOC
+      click_on "Preview"
+
+      expect(preview).to have_content("do_not_linkify")
+      expect(preview).to have_content('[[do_not_linkify]]')
+      expect(preview).to have_content('[[also_do_not_linkify]]')
+    end
+  end
+end