only reset fields that have not been routed to at all (#217)

app/models/form.rb

@@ -59,11 +59,13 @@ class Form
   end
 
   def invalidated_questions(case_log)
-    (invalidated_page_questions(case_log) + invalidated_conditional_questions(case_log)).uniq
+    invalidated_page_questions(case_log) + invalidated_conditional_questions(case_log)
   end
 
   def invalidated_page_questions(case_log)
-    invalidated_pages(case_log).flat_map(&:questions) || []
+    pages_that_are_routed_to = pages.select { |p| p.routed_to?(case_log) }
+    enabled_question_ids = pages_that_are_routed_to.flat_map(&:questions).map(&:id) || []
+    invalidated_pages(case_log).flat_map(&:questions).reject { |q| enabled_question_ids.include?(q.id) } || []
   end
 
   def invalidated_conditional_questions(case_log)

spec/features/form/validations_spec.rb

@@ -102,24 +102,6 @@ RSpec.describe "validations" do
     end
   end
 
-  describe "Compound validations" do
-    context "when you select two compatible answers, that become incompatible if the first answer changes", js: true do
-      it "clears the second answer on change of the first" do
-        case_log.update!(other_hhmemb: 1, relat2: "Partner", age2: 32, sex2: "Female", ecstat2: "Not seeking work")
-        visit("/logs/#{id}/conditional-question")
-        choose("case-log-preg-occ-yes-field", allow_label_click: true)
-        click_button("Save and continue")
-        choose("case-log-cbl-yes-field", allow_label_click: true)
-        click_button("Save and continue")
-        page.go_back
-        click_link("Back")
-        choose("case-log-preg-occ-no-field", allow_label_click: true)
-        click_button("Save and continue")
-        expect(case_log.reload.cbl).to be_nil
-      end
-    end
-  end
-
   describe "Soft Validation" do
     context "given a weekly net income that is above the expected amount for the given economic status but below the hard max" do
       let(:case_log) do

spec/fixtures/forms/2021_2022.json

@@ -325,7 +325,7 @@
               },
               "conditional_question_no_page": {
                 "questions": {
-                  "conditional_question_no_question": {
+                  "cbl": {
                     "check_answer_label": "Has the condition not been met?",
                     "header": "Has the next condition not been met?",
                     "type": "radio",

spec/models/case_log_spec.rb

@@ -1228,4 +1228,21 @@ RSpec.describe Form, type: :model do
       expect(record_from_db["has_benefits"]).to eq("Yes")
     end
   end
+
+  describe "resetting invalidated fields" do
+    context "when a question that has already been answered, no longer has met dependencies" do
+      let(:case_log) { FactoryBot.create(:case_log, :in_progress, cbl: "Yes", preg_occ: "No") }
+
+      it "clears the answer" do
+        expect { case_log.update!(preg_occ: nil) }.to change { case_log.cbl }.from("Yes").to(nil)
+      end
+    end
+
+    context "two pages with the same question key, only one's dependency is met" do
+      let(:case_log) { FactoryBot.create(:case_log, :in_progress, cbl: "Yes", preg_occ: "No") }
+      it "does not clear the answer" do
+        expect(case_log.cbl).to eq("Yes")
+      end
+    end
+  end
 end

spec/models/form_spec.rb

@@ -31,4 +31,22 @@ RSpec.describe Form, type: :model do
       expect(form.next_page_redirect_path(previous_conditional_page, case_log)).to eq("case_log_conditional_question_no_page_path")
     end
   end
+
+  describe "invalidated_page_questions" do
+    context "dependencies not met" do
+      let(:expected_invalid) { %w[la_known cbl conditional_question_no_second_question dependent_question declaration] }
+      it "returns an array of question keys whose pages conditions are not met" do
+        expect(form.invalidated_page_questions(case_log).map(&:id).uniq).to eq(expected_invalid)
+      end
+    end
+
+    context "two pages with the same question, only one has dependencies met" do
+      let(:expected_invalid) { %w[la_known conditional_question_no_second_question dependent_question declaration] }
+
+      it "returns an array of question keys whose pages conditions are not met" do
+        case_log["preg_occ"] = "No"
+        expect(form.invalidated_page_questions(case_log).map(&:id).uniq).to eq(expected_invalid)
+      end
+    end
+  end
 end