[chore] add unit tests to new dsl input

spec/lib/primer/open_project/forms/dsl/input_methods_spec.rb

@@ -279,6 +279,14 @@ RSpec.describe Primer::OpenProject::Forms::Dsl::InputMethods, type: :forms do
       it_behaves_like "supporting help texts"
     end
 
+    describe "#filterable_tree_view" do
+      let(:field_group) { form_dsl.filterable_tree_view(name:, **options) }
+
+      include_examples "input class", Primer::OpenProject::Forms::Dsl::FilterableTreeViewInput
+      # TODO: Should the filterable tree view support a label?
+      # it_behaves_like "supporting help texts"
+    end
+
     describe "#segmented_control" do
       let(:field_group) do
         form_dsl.segmented_control(name:, label:, value: "a", items: [{ value: "a", label: "A" }], **options)

spec/lib/primer/open_project/forms/filterable_tree_view_spec.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+#-- copyright
+# OpenProject is an open source project management software.
+# Copyright (C) the OpenProject GmbH
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2013 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See COPYRIGHT and LICENSE files for more details.
+#++
+#
+require "spec_helper"
+
+RSpec.describe Primer::OpenProject::Forms::FilterableTreeView, type: :forms do
+  include ViewComponent::TestHelpers
+
+  describe "rendering" do
+    let(:params) { {} }
+    let(:model) { build_stubbed(:comment) }
+
+    def render_form
+      render_in_view_context(model, params) do |model, params|
+        primer_form_with(url: "/foo", model:) do |f|
+          render_inline_form(f) do |form|
+            form.filterable_tree_view(name: :ingredients, **params) do |tree|
+              tree.with_leaf(select_variant: :multiple, label: "flour")
+              tree.with_leaf(select_variant: :multiple, label: "sugar")
+              tree.with_leaf(select_variant: :multiple, label: "eggs")
+            end
+          end
+        end
+      end
+    end
+
+    subject(:rendered_form) do
+      render_form
+      page
+    end
+
+    it "renders the filterable-tree-view" do
+      expect(rendered_form).to have_element :"filterable-tree-view"
+    end
+
+    it "renders the leafs", :aggregate_failures do
+      expect(rendered_form).to have_element(:li, class: "TreeViewItem", role: "none", text: "flour")
+      expect(rendered_form).to have_element(:li, class: "TreeViewItem", role: "none", text: "sugar")
+      expect(rendered_form).to have_element(:li, class: "TreeViewItem", role: "none", text: "eggs")
+    end
+  end
+end