Fix handling of milliseconds

Author: joshkel

__tests__/calculations.test.ts

@@ -348,6 +348,9 @@ describe("DateTime calculations", () => {
     expect(utils.getDiff(utils.date("2018-10-30"), "2018-10-29", "seconds")).toBe(
       24 * 3600
     );
+    expect(utils.getDiff(utils.date("2018-10-30"), "2018-10-29", "milliseconds")).toBe(
+      24 * 3600 * 1000
+    );
   });
 
   utilsTest("mergeDateAndTime", (date, utils, lib) => {

packages/js-joda/src/js-joda-utils.ts

@@ -234,8 +234,8 @@ export default class JsJodaUtils implements IUtils<Temporal> {
     } else if (value instanceof LocalDate && comparingDate instanceof LocalDate && !chronoUnit.isDateBased()) {
       // Convert days using the estimated duration of one day.
       const days = ChronoUnit.DAYS.between(comparingDate, value);
-      return days * ChronoUnit.DAYS.duration().get(chronoUnit);
-    } else {
+      return (days * ChronoUnit.DAYS.duration().toMillis()) / chronoUnit.duration().toMillis();
+  } else {
       return chronoUnit.between(comparingDate, value);
     }