extract TYPE_OF_UNIT_MAP

app/models/derived_variables/case_log_variables.rb

@@ -1,5 +1,13 @@
 module DerivedVariables::CaseLogVariables
   RENT_TYPE_MAPPING = { 0 => 1, 1 => 2, 2 => 2, 3 => 3, 4 => 3, 5 => 3 }.freeze
+  TYPE_OF_UNIT_MAP = {
+    "Self-contained flat or bedsit" => 1,
+    "Self-contained flat or bedsit with common facilities" => 2,
+    "Shared flat" => 3,
+    "Shared house or hostel" => 4,
+    "Bungalow" => 5,
+    "Self-contained house" => 6,
+}.freeze
 
   def supported_housing_schemes_enabled?
     FeatureToggle.supported_housing_schemes_enabled?
@@ -75,15 +83,7 @@ module DerivedVariables::CaseLogVariables
       if location
         self.la = location.county
         self.postcode_full = location.postcode
-        type_of_unit_map = {
-          "Self-contained flat or bedsit" => 1,
-          "Self-contained flat or bedsit with common facilities" => 2,
-          "Shared flat" => 3,
-          "Shared house or hostel" => 4,
-          "Bungalow" => 5,
-          "Self-contained house" => 6,
-        }
-        self.unittype_sh = type_of_unit_map[location.type_of_unit]
+        self.unittype_sh = TYPE_OF_UNIT_MAP[location.type_of_unit]
         self.builtype = form.questions.find { |x| x.id == "builtype" }.answer_options.select { |_key, value| value["value"] == location.type_of_building }.keys.first
         wheelchair_adaptation_map = { 1 => 1, 0 => 2 }
         self.wchair = wheelchair_adaptation_map[location.wheelchair_adaptation.to_i]