gitlab-org--gitlab-foss/spec/features/markdown/mermaid_spec.rb

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require 'spec_helper'
describe 'Mermaid rendering', :js do
it 'renders Mermaid diagrams correctly' do
description = <<~MERMAID
```mermaid
graph TD;
A-->B;
A-->C;
B-->D;
C-->D;
```
MERMAID
project = create(:project, :public)
issue = create(:issue, project: project, description: description)
visit project_issue_path(project, issue)
%w[A B C D].each do |label|
expect(page).to have_selector('svg text', text: label)
end
end
end