timings, omitted hours
<link rel="help" href="https://w3c.github.io/webvtt/#collect-a-webvtt-timestamp">

assert_equals(cues.length, 3);

Array.from(cues).forEach(function(cue, index) {
    assert_equals(cue.text, 'text' + index, 'Failed with cue ' + index);
    assert_equals(cue.startTime, 0, 'Failed with cue ' + index);
    assert_equals(cue.endTime, 1, 'Failed with cue ' + index);
});

===
WEBVTT

00:00.000 --> 00:00:01.000
text0

00:00:00.000 --> 00:01.000
text1

00:00.000 --> 00:01.000
text2