fix issues with check answers

app/models/form/question.rb

@@ -63,8 +63,14 @@ class Form::Question
     conditional_on.all? { |condition| evaluate_condition(condition, case_log) }
   end
 
-  def hidden_in_check_answers?
+  def hidden_in_check_answers?(case_log)
-    hidden_in_check_answers
+    if hidden_in_check_answers.is_a?(Hash)
+      hidden_in_check_answers["depends_on"].any? do |hsh| 
+        hsh.all? { |key, value| case_log[key] == value }
+      end
+    else 
+      hidden_in_check_answers
+    end
   end
 
   def has_inferred_check_answers_value?(case_log)

app/models/form/subsection.rb

@@ -30,9 +30,10 @@ class Form::Subsection
       return :cannot_start_yet
     end
 
-    qs = applicable_questions(case_log).reject { |q| CaseLog::OPTIONAL_FIELDS.include?(q.id) }
+    qs = applicable_questions(case_log)
+    qs_optional_removed = qs.reject { |q| CaseLog::OPTIONAL_FIELDS.include?(q.id) }
     return :not_started if qs.all? { |question| case_log[question.id].blank? || question.read_only? }
-    return :completed if qs.all? { |question| question.completed?(case_log) }
+    return :completed if qs_optional_removed.all? { |question| question.completed?(case_log) }
 
     :in_progress
   end
@@ -54,7 +55,7 @@ class Form::Subsection
   end
 
   def applicable_questions(case_log)
-    questions.select { |q| (displayed_to_user?(case_log, q) && !q.hidden_in_check_answers?) || q.has_inferred_check_answers_value?(case_log) }
+    questions.select { |q| (displayed_to_user?(case_log, q) && !q.hidden_in_check_answers?(case_log)) || q.has_inferred_check_answers_value?(case_log) }
   end
 
   def answered_questions(case_log)

config/forms/2021_2022.json

@@ -1147,7 +1147,12 @@
                       0
                     ]
                   },
-                  "hidden_in_check_answers": true
+                  "hidden_in_check_answers": {
+                    "depends_on": [
+                      { "age1_known": 0 },
+                      { "age1_known": 1 }
+                    ]
+                  }
                 },
                 "age1": {
                   "header": "Age",

spec/fixtures/forms/2021_2022.json

@@ -849,6 +849,12 @@
                       "7": {
                         "value": "Don’t know"
                       }
+                    },
+                    "hidden_in_check_answers": {
+                      "depends_on": [
+                        { "layear": 0 },
+                        { "layear": 1 }
+                      ]
                     }
                   }
                 },

spec/models/form/question_spec.rb

@@ -345,4 +345,20 @@ RSpec.describe Form::Question, type: :model do
       end
     end
   end
+
+  context "when the question has a hidden in check answers attribute with dependencies" do
+    let(:section_id) { "local_authority" }
+    let(:subsection_id) { "local_authority" }
+    let(:page_id) { "time_lived_in_la" }
+    let(:question_id) { "layear" }
+    let(:case_log) do
+      FactoryBot.create(:case_log, :in_progress)
+    end
+    
+    it "can work out if the question will be shown in check answers" do
+      expect(question.hidden_in_check_answers?(case_log)).to be(false)
+      case_log.layear = 0
+      expect(question.hidden_in_check_answers?(case_log)).to be(true)
+    end
+  end 
 end

spec/models/form/subsection_spec.rb

@@ -57,6 +57,20 @@ RSpec.describe Form::Subsection, type: :model do
       expect(subsection.is_started?(case_log)).to be(true)
     end
 
+    context "with optional fields" do 
+      subject(:subsection) { described_class.new(subsection_id, subsection_definition, section) }
+      let(:section_id) { "tenancy_and_property" }
+      let(:section_definition) { form.form_definition["sections"][section_id] }
+      let(:section) { Form::Section.new(section_id, section_definition, form) }
+      let(:subsection_id) { "property_information" }
+      let(:subsection_definition) { section_definition["subsections"][subsection_id] }
+      
+      it "has a started status even if only an optional field has been answered" do
+        case_log.postcode_known = 0
+        expect(subsection.is_started?(case_log)).to be(true)
+      end 
+    end
+
     it "has question helpers for the number of applicable questions" do
       expected_questions = %w[tenant_code age1 sex1 ecstat1 other_hhmemb ecstat2 propcode]
       expect(subsection.applicable_questions(case_log).map(&:id)).to eq(expected_questions)