remove validation that is specific to number format and fold that functionality into accuracy validation, rejig tests accordingly

app/models/validations/shared_validations.rb

@@ -39,26 +39,18 @@ module Validations::SharedValidations
       next unless question.step
       next unless record[question.id] && question.page.routed_to?(record, nil)
 
-      begin
-        input = record.public_send("#{question.id}_before_type_cast")
-        answer = Float(input)
-      rescue ArgumentError
-        add_step_error(record, question)
-      end
-
-      if (answer * 100) % (question.step * 100) != 0
-        add_step_error(record, question)
-      end
-    end
-  end
-
-  def validate_numeric_normal_format(record)
-    record.form.numeric_questions.each do |question|
-      next unless record[question.id] && question.page.routed_to?(record, nil)
-
-      user_input = record.public_send("#{question.id}_before_type_cast")
-      if user_input.is_a?(String) && user_input.include?("e")
-        record.errors.add question.id.to_sym, I18n.t("validations.numeric.normal_format")
+      value = record.public_send("#{question.id}_before_type_cast")
+      field = question.check_answer_label || question.id
+      incorrect_accuracy = (value.to_d * 100) % (question.step * 100) != 0
+
+      if question.step < 1 && incorrect_accuracy
+        record.errors.add question.id.to_sym, I18n.t("validations.numeric.nearest_penny", field:)
+      elsif incorrect_accuracy || value.to_d != value.to_i    # if the user enters a value in exponent notation (eg '4e1') the to_i method does not convert this to the correct value
+        field = question.check_answer_label || question.id
+        case question.step
+        when 1 then record.errors.add question.id.to_sym, I18n.t("validations.numeric.whole_number", field:)
+        when 10 then record.errors.add question.id.to_sym, I18n.t("validations.numeric.nearest_ten", field:)
+        end
       end
     end
   end
@@ -154,13 +146,4 @@ private
       record.errors.add question.id.to_sym, :under_min, message: I18n.t("validations.numeric.above_min", field:, min:)
     end
   end
-
-  def add_step_error(record, question)
-    field = question.check_answer_label || question.id
-    case question.step
-    when 1 then record.errors.add question.id.to_sym, I18n.t("validations.numeric.whole_number", field:)
-    when 10 then record.errors.add question.id.to_sym, I18n.t("validations.numeric.nearest_ten", field:)
-    when 0.01 then record.errors.add question.id.to_sym, I18n.t("validations.numeric.nearest_penny", field:)
-    end
-  end
 end

spec/models/validations/shared_validations_spec.rb

@@ -122,6 +122,12 @@ RSpec.describe Validations::SharedValidations do
         expect(sales_log.errors[:income1]).to include I18n.t("validations.numeric.whole_number", field: "Buyer 1’s gross annual income")
       end
 
+      it "adds an error if the user attempts to input a number in exponent format" do
+        sales_log.income1 = "3e5"
+        shared_validator.validate_numeric_step(sales_log)
+        expect(sales_log.errors[:income1]).to include I18n.t("validations.numeric.whole_number", field: "Buyer 1’s gross annual income")
+      end
+
       it "does not add an error if input is an integer" do
         sales_log.income1 = 30_000
         shared_validator.validate_numeric_step(sales_log)
@@ -136,6 +142,12 @@ RSpec.describe Validations::SharedValidations do
         expect(sales_log.errors[:savings]).to include I18n.t("validations.numeric.nearest_ten", field: "Buyer’s total savings (to nearest £10) before any deposit paid")
       end
 
+      it "adds an error if the user attempts to input a number in exponent format" do
+        sales_log.savings = "3e5"
+        shared_validator.validate_numeric_step(sales_log)
+        expect(sales_log.errors[:savings]).to include I18n.t("validations.numeric.nearest_ten", field: "Buyer’s total savings (to nearest £10) before any deposit paid")
+      end
+
       it "does not add an error if input is a multiple of ten" do
         sales_log.savings = 30_000
         shared_validator.validate_numeric_step(sales_log)
@@ -150,6 +162,12 @@ RSpec.describe Validations::SharedValidations do
         expect(sales_log.errors[:mscharge]).to include I18n.t("validations.numeric.nearest_penny", field: "Monthly leasehold charges")
       end
 
+      it "does not add an error if the user attempts to input a number in exponent format" do
+        sales_log.mscharge = "3e1"
+        shared_validator.validate_numeric_step(sales_log)
+        expect(sales_log.errors).to be_empty
+      end
+
       it "does not add an error if input has 2 or fewer decimal places" do
         sales_log.mscharge = 30.74
         shared_validator.validate_numeric_step(sales_log)
@@ -158,20 +176,6 @@ RSpec.describe Validations::SharedValidations do
     end
   end
 
-  describe "validating the format of inputs in numeric questions" do
-    it "adds an error if number is input in exponent notation" do
-      sales_log.age2 = "1e1"
-      shared_validator.validate_numeric_normal_format(sales_log)
-      expect(sales_log.errors[:age2]).to include I18n.t("validations.numeric.normal_format")
-    end
-
-    it "does not add an error if number is input in standard notation" do
-      sales_log.age2 = "11"
-      shared_validator.validate_numeric_normal_format(sales_log)
-      expect(sales_log.errors).to be_empty
-    end
-  end
-
   describe "radio options validations" do
     it "allows only possible values" do
       lettings_log.needstype = 1