Use aria-label in admin table actions

This way screen reader users will know which record they're going to
access when focusing on a link to a certain action. Otherwise they'd
hear something like "Edit, link", and they wouldn't know which record
they'll end up editing if they follow the link.

spec/components/admin/action_component_spec.rb

@@ -6,4 +6,58 @@ describe Admin::ActionComponent do
 
     expect(page).to have_css "a.edit-link"
   end
+
+  describe "aria-label attribute" do
+    it "is not rendered by default" do
+      record = double(human_name: "Stay home")
+
+      render_inline Admin::ActionComponent.new(:edit, record, path: "/")
+
+      expect(page).to have_link count: 1
+      expect(page).not_to have_css "[aria-label]"
+    end
+
+    it "is not rendered when aria-label is nil" do
+      render_inline Admin::ActionComponent.new(:edit, double, path: "/", "aria-label": nil)
+
+      expect(page).to have_link count: 1
+      expect(page).not_to have_css "[aria-label]"
+    end
+
+    it "renders with the given value" do
+      render_inline Admin::ActionComponent.new(:edit, double, path: "/", "aria-label": "Modify")
+
+      expect(page).to have_link count: 1
+      expect(page).to have_css "[aria-label='Modify']"
+    end
+
+    context "when aria-label is true" do
+      it "includes the action and the human_name of the record" do
+        record = double(human_name: "Stay home")
+
+        render_inline Admin::ActionComponent.new(:edit, record, path: "/", "aria-label": true)
+
+        expect(page).to have_link count: 1
+        expect(page).to have_css "a[aria-label='Edit Stay home']", exact_text: "Edit"
+      end
+
+      it "uses the to_s method when there's no human_name" do
+        record = double(to_s: "do_not_go_out")
+
+        render_inline Admin::ActionComponent.new(:edit, record, path: "/", "aria-label": true)
+
+        expect(page).to have_link count: 1
+        expect(page).to have_css "a[aria-label='Edit Do not go out']", exact_text: "Edit"
+      end
+
+      it "uses the human_name when there are both human_name and to_s" do
+        record = double(human_name: "Stay home", to_s: "do_not_go_out")
+
+        render_inline Admin::ActionComponent.new(:edit, record, path: "/", "aria-label": true)
+
+        expect(page).to have_link count: 1
+        expect(page).to have_css "a[aria-label='Edit Stay home']", exact_text: "Edit"
+      end
+    end
+  end
 end