Clear postcode known if postcode is getting cleared (#1447)

app/services/imports/sales_logs_import_service.rb

@@ -191,6 +191,8 @@ module Imports
         sales_log.errors.each do |error|
           @logger.warn("Log #{sales_log.old_id}: Removing field #{error.attribute} from log triggering validation: #{error.type}")
           attributes.delete(error.attribute.to_s)
+          attributes.delete("pcodenk") if error.attribute == :postcode_full
+          attributes.delete("ppcodenk") if error.attribute == :ppostcode_full
         end
         @logs_overridden << sales_log.old_id
         save_sales_log(attributes, previous_status)

spec/services/imports/sales_logs_import_service_spec.rb

@@ -448,6 +448,32 @@ RSpec.describe Imports::SalesLogsImportService do
       end
     end
 
+    context "and it has invalid postcodes" do
+      let(:sales_log_id) { "shared_ownership_sales_log" }
+
+      before do
+        sales_log_xml.at_xpath("//meta:status").content = "submitted-invalid"
+        sales_log_xml.at_xpath("//xmlns:Q14Postcode").content = "2AA" # postcode
+      end
+
+      it "intercepts the relevant validation error" do
+        expect(logger).to receive(:warn).with(/Enter a postcode in the correct format, for example AA1 1AA/)
+        expect { sales_log_service.send(:create_log, sales_log_xml) }
+          .not_to raise_error
+      end
+
+      it "clears out the invalid answers" do
+        allow(logger).to receive(:warn)
+
+        sales_log_service.send(:create_log, sales_log_xml)
+        sales_log = SalesLog.find_by(old_id: sales_log_id)
+
+        expect(sales_log).not_to be_nil
+        expect(sales_log.postcode_full).to be_nil
+        expect(sales_log.postcode_full).to be_nil
+      end
+    end
+
     context "and it has an invalid record with invalid contracts exchange date" do
       let(:sales_log_id) { "shared_ownership_sales_log" }