[file_selector_platform_interface]: Verify that extensions don't have leading dots.

packages/file_selector/file_selector_platform_interface/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.0.1
+
+* Replace extensions with leading dots.
+
 ## 2.0.0
 
 * Migration to null-safety

packages/file_selector/file_selector_platform_interface/lib/src/types/x_type_group/x_type_group.dart

@@ -10,11 +10,11 @@ class XTypeGroup {
   /// allowed.
   XTypeGroup({
     this.label,
-    this.extensions,
+    List<String>? extensions,
     this.mimeTypes,
     this.macUTIs,
     this.webWildCards,
-  });
+  }) : this.extensions = _removeLeadingDots(extensions);
 
   /// The 'name' or reference to this group of types
   final String? label;
@@ -41,4 +41,7 @@ class XTypeGroup {
       'webWildCards': webWildCards,
     };
   }
+
+  static List<String>? _removeLeadingDots(List<String>? exts) =>
+      exts?.map((ext) => ext.startsWith('.') ? ext.substring(1) : ext).toList();
 }

packages/file_selector/file_selector_platform_interface/pubspec.yaml

@@ -3,7 +3,7 @@ description: A common platform interface for the file_selector plugin.
 homepage: https://github.com/flutter/plugins/tree/master/packages/file_selector/file_selector_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.0.0
+version: 2.0.1
 
 dependencies:
   flutter:

packages/file_selector/file_selector_platform_interface/test/method_channel_file_selector_test.dart

@@ -29,14 +29,14 @@ void main() {
       test('passes the accepted type groups correctly', () async {
         final group = XTypeGroup(
           label: 'text',
-          extensions: ['.txt'],
+          extensions: ['txt'],
           mimeTypes: ['text/plain'],
           macUTIs: ['public.text'],
         );
 
         final groupTwo = XTypeGroup(
             label: 'image',
-            extensions: ['.jpg'],
+            extensions: ['jpg'],
             mimeTypes: ['image/jpg'],
             macUTIs: ['public.image'],
             webWildCards: ['image/*']);
@@ -90,14 +90,14 @@ void main() {
       test('passes the accepted type groups correctly', () async {
         final group = XTypeGroup(
           label: 'text',
-          extensions: ['.txt'],
+          extensions: ['txt'],
           mimeTypes: ['text/plain'],
           macUTIs: ['public.text'],
         );
 
         final groupTwo = XTypeGroup(
             label: 'image',
-            extensions: ['.jpg'],
+            extensions: ['jpg'],
             mimeTypes: ['image/jpg'],
             macUTIs: ['public.image'],
             webWildCards: ['image/*']);
@@ -152,14 +152,14 @@ void main() {
       test('passes the accepted type groups correctly', () async {
         final group = XTypeGroup(
           label: 'text',
-          extensions: ['.txt'],
+          extensions: ['txt'],
           mimeTypes: ['text/plain'],
           macUTIs: ['public.text'],
         );
 
         final groupTwo = XTypeGroup(
             label: 'image',
-            extensions: ['.jpg'],
+            extensions: ['jpg'],
             mimeTypes: ['image/jpg'],
             macUTIs: ['public.image'],
             webWildCards: ['image/*']);

packages/file_selector/file_selector_platform_interface/test/x_type_group_test.dart

@@ -9,7 +9,7 @@ void main() {
   group('XTypeGroup', () {
     test('toJSON() creates correct map', () {
       final label = 'test group';
-      final extensions = ['.txt', '.jpg'];
+      final extensions = ['txt', 'jpg'];
       final mimeTypes = ['text/plain'];
       final macUTIs = ['public.plain-text'];
       final webWildCards = ['image/*'];
@@ -41,5 +41,12 @@ void main() {
       expect(jsonMap['macUTIs'], null);
       expect(jsonMap['webWildCards'], null);
     });
+
+    test('Leading dots are removed from extensions', () {
+      final extensions = ['.txt', '.jpg'];
+      final group = XTypeGroup(extensions: extensions);
+
+      expect(group.extensions, ['txt', 'jpg']);
+    });
   });
 }