node@e8f736e24b5c:/opt/magic_mirror$ npx jest tests/unit/modules/default/calendar/calendar_fetcher_utils_spec.js
 FAIL   unit  tests/unit/modules/default/calendar/calendar_fetcher_utils_spec.js
  Calendar fetcher utils test
    filterEvents
      ✓ should return only ongoing and upcoming non full day events (46 ms)
      ✓ should return only ongoing and upcoming full day events (1 ms)
      ✕ should return the correct times when recurring events pass through daylight saving time (40 ms)
      ✓ should return the correct moments based on the timezone given (17 ms)

  ● Calendar fetcher utils test › filterEvents › should return the correct times when recurring events pass through daylight saving time

    TypeError: Cannot read properties of undefined (reading 'startDate')

      80 |                              .tz(moment.tz.guess()); // Convert to guessed timezone as that is used in the filterEvents
      81 |
    > 82 |                      let julyMoment = moment(`${moment(julyFirst[0].startDate, "x").format("YYYY")}-07-01T09:00:00`)
         |                                                                     ^
      83 |                              .tz("Europe/Amsterdam", true) // Convert to Europe/Amsterdam timezone (see event ical) but keep 9 o'clock
      84 |                              .tz(moment.tz.guess()); // Convert to guessed timezone as that is used in the filterEvents
      85 |

      at Object.startDate (tests/unit/modules/default/calendar/calendar_fetcher_utils_spec.js:82:51)

Test Suites: 1 failed, 1 total
Tests:       1 failed, 3 passed, 4 total
Snapshots:   0 total
Time:        0.721 s
Ran all test suites matching tests/unit/modules/default/calendar/calendar_fetcher_utils_spec.js.