[video_player] Fix video player test (#3361)

Author: Emmanuel Garcia

packages/video_player/video_player/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.0.0-nullsafety.6
+
+* Fix `VideoPlayerValue toString()` test.
+
 ## 2.0.0-nullsafety.5
 
 * Fix outdated links across a number of markdown files ([#3276](https://github.com/flutter/plugins/pull/3276))

packages/video_player/video_player/pubspec.yaml

@@ -4,7 +4,7 @@ description: Flutter plugin for displaying inline video with other Flutter
 # 0.10.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 2.0.0-nullsafety.5
+version: 2.0.0-nullsafety.6
 homepage: https://github.com/flutter/plugins/tree/master/packages/video_player/video_player
 
 flutter:

packages/video_player/video_player/test/video_player_test.dart

@@ -567,7 +567,7 @@ void main() {
           'VideoPlayerValue(duration: 0:00:05.000000, '
           'size: Size(400.0, 300.0), '
           'position: 0:00:01.000000, '
-          'caption: Caption(number: null, start: null, end: null, text: foo), '
+          'caption: Caption(number: 0, start: 0:00:00.000000, end: 0:00:00.000000, text: foo), '
           'buffered: [DurationRange(start: 0:00:00.000000, end: 0:00:04.000000)], '
           'isInitialized: true, '
           'isPlaying: true, '