test: add test for syncing color with dart_bbcode_web_colors

Author: realth000

test/test_004_named_color_values_test.dart

@@ -0,0 +1,16 @@
+import 'package:collection/collection.dart';
+import 'package:dart_bbcode_web_colors/dart_bbcode_web_colors.dart';
+import 'package:flutter_bbcode_editor/flutter_bbcode_editor.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  test('values synced with dart_bbcode_web_colors', () {
+    // All colors in `BBCodeEditorColor` shall have the same value with the one in `WebColors`.
+    for (final color in BBCodeEditorColor.values) {
+      final target = WebColors.values.firstWhereOrNull(
+        (e) => e.colorValue == color.color.toARGB32() && e.name.toLowerCase() == color.namedColor.toLowerCase(),
+      );
+      expect(target != null, true, reason: 'BBCodeEditorColor "$color" not synced');
+    }
+  });
+}