Wrote specs for GraphQL root resolvers

spec/lib/graph_ql/root_collection_resolver_spec.rb

@@ -0,0 +1,27 @@
+require 'rails_helper'
+
+describe GraphQL::RootCollectionResolver do
+  let(:comments_resolver) { GraphQL::RootCollectionResolver.new(Comment) }
+
+  describe '#call' do
+    it 'resolves collections' do
+      comment_1 = create(:comment)
+      comment_2 = create(:comment)
+
+      result = comments_resolver.call(nil, nil, nil)
+
+      expect(result).to match_array([comment_1, comment_2])
+    end
+
+    it 'blocks collection forbidden elements' do
+      proposal = create(:proposal, :hidden)
+      comment_1 = create(:comment)
+      comment_2 = create(:comment, commentable: proposal)
+
+      result = comments_resolver.call(nil, nil, nil)
+
+      expect(result).to match_array([comment_1])
+    end
+  end
+
+end