validate null for startdate

app/services/bulk_upload/lettings/row_parser.rb

@@ -139,6 +139,9 @@ class BulkUpload::Lettings::RowParser
 
   validates :field_1, presence: true, inclusion: { in: (1..12).to_a }
   validates :field_4, presence: { if: proc { [1, 3, 5, 7, 9, 11].include?(field_1) } }
+  validates :field_96, presence: true
+  validates :field_97, presence: true
+  validates :field_98, presence: true
 
   def attribute_set
     @attribute_set ||= instance_variable_get(:@attributes)

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -98,6 +98,18 @@ RSpec.describe BulkUpload::Lettings::RowParser do
       end
     end
 
+    describe "fields 96, 97, 98 => startdate" do
+      context "when any one of these fields is blank" do
+        let(:attributes) { { field_96: nil, field_97: nil, field_98: nil } }
+
+        it "returns an error" do
+          expect(parser.errors[:field_96]).to be_present
+          expect(parser.errors[:field_97]).to be_present
+          expect(parser.errors[:field_98]).to be_present
+        end
+      end
+    end
+
     describe "#field_134" do
       context "when an unpermitted value" do
         let(:attributes) { { field_134: 3 } }