RfCs: Allow filtering for any states

We want to differentiate between those RfCs explicitly marked as solved, those potentially solved since the author reached the maximum score, and those being unsolved where the author has not yet reached the full score yet.

spec/models/request_for_comment_spec.rb

@@ -3,9 +3,8 @@
 require 'rails_helper'
 
 RSpec.describe RequestForComment do
-  let!(:rfc) { create(:rfc) }
-
   describe 'scope with_comments' do
+    let!(:rfc) { create(:rfc) }
     let!(:rfc2) { create(:rfc_with_comment) }
 
     it 'includes all RfCs with comments' do
@@ -16,4 +15,26 @@ RSpec.describe RequestForComment do
       expect(described_class.with_comments).not_to include(rfc)
     end
   end
+
+  describe 'state' do
+    let!(:rfc_solved) { create(:rfc, solved: true) }
+    let!(:rfc_soft_solved) { create(:rfc, solved: false, full_score_reached: true) }
+    let!(:rfc_ongoing) { create(:rfc, solved: false, full_score_reached: false) }
+
+    it 'returns solved RfCs when solved state is requested' do
+      expect(described_class.state(RequestForComment::SOLVED)).to contain_exactly(rfc_solved)
+    end
+
+    it 'returns soft solved RfCs when soft solved state is requested' do
+      expect(described_class.state(RequestForComment::SOFT_SOLVED)).to contain_exactly(rfc_soft_solved)
+    end
+
+    it 'returns ongoing RfCs when ongoing state is requested' do
+      expect(described_class.state(RequestForComment::ONGOING)).to contain_exactly(rfc_ongoing)
+    end
+
+    it 'returns all RfCs when all state is requested' do
+      expect(described_class.state(RequestForComment::ALL)).to contain_exactly(rfc_solved, rfc_soft_solved, rfc_ongoing)
+    end
+  end
 end