Add AsciiDoc snippet for CI/CD Badges

This commit adds CI/CD Badges Snippets for AsciiDoc as requested in #26087.
I've however run into an issue in highlighting the snippet, it seems as if AsciiDoc is currently not being highlighted properly (displayed as plaintext)

Add testcase for to_asciidoc

Update test case for Badges list

2 files changed, 14 insertions, 2 deletions

diff --git a/spec/features/projects/badges/list_spec.rb b/spec/features/projects/badges/list_spec.rb
index 67a4a5d1ab1..ae9db0c0d6e 100644
--- a/spec/features/projects/badges/list_spec.rb
+++ b/spec/features/projects/badges/list_spec.rb
@@ -14,7 +14,8 @@ feature 'list of badges' do
       expect(page).to have_content 'build status'
       expect(page).to have_content 'Markdown'
       expect(page).to have_content 'HTML'
-      expect(page).to have_css('.highlight', count: 2)
+      expect(page).to have_content 'AsciiDoc'
+      expect(page).to have_css('.highlight', count: 3)
       expect(page).to have_xpath("//img[@alt='build status']")
 
       page.within('.highlight', match: :first) do
@@ -28,7 +29,8 @@ feature 'list of badges' do
       expect(page).to have_content 'coverage report'
       expect(page).to have_content 'Markdown'
       expect(page).to have_content 'HTML'
-      expect(page).to have_css('.highlight', count: 2)
+      expect(page).to have_content 'AsciiDoc'
+      expect(page).to have_css('.highlight', count: 3)
       expect(page).to have_xpath("//img[@alt='coverage report']")
 
       page.within('.highlight', match: :first) do
diff --git a/spec/lib/gitlab/badge/shared/metadata.rb b/spec/lib/gitlab/badge/shared/metadata.rb
index 0cf18514251..63c7ca5a915 100644
--- a/spec/lib/gitlab/badge/shared/metadata.rb
+++ b/spec/lib/gitlab/badge/shared/metadata.rb
@@ -18,4 +18,14 @@ shared_examples 'badge metadata' do
     it { is_expected.to include metadata.image_url }
     it { is_expected.to include metadata.link_url }
   end
+
+  describe '#to_asciidoc' do
+    subject { metadata.to_asciidoc }
+
+    it { is_expected.to include metadata.image_url }
+    it { is_expected.to include metadata.link_url }
+    it { is_expected.to include 'image:' }
+    it { is_expected.to include 'link=' }
+    it { is_expected.to include 'title=' }
+  end
 end