Add experimental machine learning

spec/components/machine_learning/comments_summary_component_spec.rb

@@ -0,0 +1,44 @@
+require "rails_helper"
+
+describe MachineLearning::CommentsSummaryComponent, type: :component do
+  let(:commentable) { double(summary_comment: double(body: "There's a general agreement")) }
+  let(:component) { MachineLearning::CommentsSummaryComponent.new(commentable) }
+
+  before do
+    Setting["feature.machine_learning"] = true
+    Setting["machine_learning.comments_summary"] = true
+    allow(controller).to receive(:current_user).and_return(nil)
+  end
+
+  it "is displayed when the setting is enabled" do
+    render_inline component
+
+    expect(page).to have_content "Comments summary"
+    expect(page).to have_content "There's a general agreement"
+    expect(page).to have_content "Content generated by AI / Machine Learning"
+  end
+
+  it "is not displayed when the setting is disabled" do
+    Setting["machine_learning.comments_summary"] = false
+
+    render_inline component
+
+    expect(page.native.inner_html).to be_empty
+  end
+
+  it "is not displayed when the machine learning feature is disabled" do
+    Setting["feature.machine_learning"] = false
+
+    render_inline component
+
+    expect(page.native.inner_html).to be_empty
+  end
+
+  it "is not displayed when there's no summary" do
+    commentable = double(summary_comment: double(body: ""))
+
+    render_inline MachineLearning::CommentsSummaryComponent.new(commentable)
+
+    expect(page.native.inner_html).to be_empty
+  end
+end