Fix a stringify failure found in EXT-X-DATERANGE's END-DATE attr (#133)

parse.ts

@@ -852,7 +852,7 @@ function checkDateRange(segments: Segment[]) {
           }
         }
         range.push({start, end});
-      } else {
+      } else if (dateRange.classId) {
         rangeList.set(dateRange.classId, [{start, end}]);
       }
     }

stringify.ts

@@ -371,7 +371,7 @@ function buildDateRange(dateRange: DateRange) {
     attrs.push(`START-DATE="${utils.formatDate(dateRange.start)}"`);
   }
   if (dateRange.end) {
-    attrs.push(`END-DATE="${dateRange.end}"`);
+    attrs.push(`END-DATE="${utils.formatDate(dateRange.end)}"`);
   }
   if (dateRange.duration) {
     attrs.push(`DURATION=${dateRange.duration}`);

test/fixtures/m3u8/SCTE-35_07.m3u8

@@ -0,0 +1,23 @@
+# This example shows two EXT-X-DATERANGE tags that describe a single
+# Date Range, with a SCTE-35 "out" splice_insert() command that is
+# subsequently updated with an SCTE-35 "in" splice_insert() command.
+
+#EXTM3U
+#EXT-X-VERSION:3
+#EXT-X-TARGETDURATION:30
+
+#EXT-X-PROGRAM-DATE-TIME:2014-03-05T11:14:00.000Z
+#EXTINF:30,
+http://media.example.com/01.ts
+#EXTINF:30,
+http://media.example.com/02.ts
+#EXT-X-DATERANGE:ID="splice-6FFFFFF0",START-DATE="2023-10-09T06:16:00.820Z",PLANNED-DURATION=59.993,SCTE35-OUT=0xFC30250001D1F7E25300FFF0140565239AA07FEFFE015C3F90FE00526362000101010000A7C1792D
+#EXTINF:30,
+http://ads.example.com/ad-01.ts
+#EXTINF:30,
+http://ads.example.com/ad-02.ts
+#EXT-X-DATERANGE:ID="splice-6FFFFFF0",START-DATE="2023-10-09T06:16:00.820Z",END-DATE="2023-10-09T06:17:01.514Z",DURATION=60.694
+#EXTINF:30,
+http://media.example.com/03.ts
+#EXTINF:3.003,
+http://media.example.com/04.ts

test/fixtures/objects/SCTE-35_07.js

@@ -0,0 +1,72 @@
+const {MediaPlaylist, Segment, DateRange} = require('../../../types');
+const utils = require('../../../utils');
+
+const playlist = new MediaPlaylist({
+  version: 3,
+  targetDuration: 30,
+  segments: createSegments()
+});
+
+function createSegments() {
+  const segments = [];
+  segments.push(new Segment({
+    uri: 'http://media.example.com/01.ts',
+    duration: 30,
+    title: '',
+    mediaSequenceNumber: 0,
+    discontinuitySequence: 0,
+    programDateTime: new Date('2014-03-05T11:14:00Z')
+  }));
+  segments.push(new Segment({
+    uri: 'http://media.example.com/02.ts',
+    duration: 30,
+    title: '',
+    mediaSequenceNumber: 1,
+    discontinuitySequence: 0
+  }));
+  segments.push(new Segment({
+    uri: 'http://ads.example.com/ad-01.ts',
+    duration: 30,
+    title: '',
+    mediaSequenceNumber: 2,
+    discontinuitySequence: 0,
+    dateRange: new DateRange({
+      id: 'splice-6FFFFFF0',
+      start: new Date('2023-10-09T06:16:00.820Z'),
+      plannedDuration: 59.993,
+      attributes: {
+        'SCTE35-OUT': utils.hexToByteSequence('0xFC30250001D1F7E25300FFF0140565239AA07FEFFE015C3F90FE00526362000101010000A7C1792D')
+      }
+    })
+  }));
+  segments.push(new Segment({
+    uri: 'http://ads.example.com/ad-02.ts',
+    duration: 30,
+    title: '',
+    mediaSequenceNumber: 3,
+    discontinuitySequence: 0
+  }));
+  segments.push(new Segment({
+    uri: 'http://media.example.com/03.ts',
+    duration: 30,
+    title: '',
+    mediaSequenceNumber: 4,
+    discontinuitySequence: 0,
+    dateRange: new DateRange({
+      id: 'splice-6FFFFFF0',
+      start: new Date('2023-10-09T06:16:00.820Z'),
+      end: new Date('2023-10-09T06:17:01.514Z'),
+      duration: 60.694
+    })
+  }));
+  segments.push(new Segment({
+    uri: 'http://media.example.com/04.ts',
+    duration: 3.003,
+    title: '',
+    mediaSequenceNumber: 5,
+    discontinuitySequence: 0
+  }));
+  return segments;
+}
+
+module.exports = playlist;