test: that basic validation on DOB is done even when CHILD_YEAR_GROUP is defined

Jira-Issue: MAV-1833

Author: MartinVanIJcken

spec/models/cohort_import_row_spec.rb

@@ -88,6 +88,23 @@
       end
     end
 
+    context "when date of birth is in the previous century" do
+      let(:data) do
+        valid_data.merge(
+          { "CHILD_DATE_OF_BIRTH" => "1911-01-01", "CHILD_YEAR_GROUP" => "9" }
+        )
+      end
+
+      it "is invalid" do
+        expect(cohort_import_row).to be_invalid
+        puts cohort_import_row.errors.full_messages
+        expect(cohort_import_row.errors.size).to eq(1)
+        expect(
+          cohort_import_row.errors["CHILD_DATE_OF_BIRTH"]
+        ).to contain_exactly("is too old to still be in school")
+      end
+    end
+
     context "with an invalid NHS number" do
       let(:data) { { "CHILD_NHS_NUMBER" => "TP01234567" } }