refactor: avoid generating duplicate assetName field (#99)

Author: lcdsmao

example/lib/gen/assets.gen.dart

@@ -91,10 +91,7 @@ class Assets {
 }
 
 class AssetGenImage extends AssetImage {
-  const AssetGenImage(String assetName)
-      : _assetName = assetName,
-        super(assetName, package: 'example');
-  final String _assetName;
+  const AssetGenImage(String assetName) : super(assetName, package: 'example');
 
   Image image({
     Key? key,
@@ -139,7 +136,7 @@ class AssetGenImage extends AssetImage {
     );
   }
 
-  String get path => _assetName;
+  String get path => assetName;
 }
 
 class SvgGenImage {

packages/core/lib/generators/assets_generator.dart

@@ -336,10 +336,7 @@ class $className {
 String _assetGenImageClassDefinition(String packageName) => '''
 
 class AssetGenImage extends AssetImage {
-  const AssetGenImage(String assetName)
-      : _assetName = assetName,
-        super(assetName, package: '$packageName');
-  final String _assetName;
+  const AssetGenImage(String assetName) : super(assetName, package: '$packageName');
 
   Image image({
     Key? key,
@@ -384,7 +381,7 @@ class AssetGenImage extends AssetImage {
     );
   }
 
-  String get path => _assetName;
+  String get path => assetName;
 }
 ''';
 
@@ -393,10 +390,7 @@ class AssetGenImage extends AssetImage {
 String _assetGenImageClassDefinitionWithNoNullSafety(String packageName) => '''
 
 class AssetGenImage extends AssetImage {
-  const AssetGenImage(String assetName)
-      : _assetName = assetName,
-        super(assetName, package: '$packageName');
-  final String _assetName;
+  const AssetGenImage(String assetName) : super(assetName, package: '$packageName');
 
   Image image({
     Key key,
@@ -441,7 +435,7 @@ class AssetGenImage extends AssetImage {
     );
   }
 
-  String get path => _assetName;
+  String get path => assetName;
 }
 ''';
 

packages/core/test/gen_test_helper.dart

@@ -24,7 +24,8 @@ void expectedAssetsGen(String pubspec, String generated, String fact) async {
 
   final actual = generateAssets(
       AssetsGenConfig.fromConfig(pubspecFile, config), formatter);
-  final expected = File(fact).readAsStringSync().replaceAll('\r\n', '\n');
+  final expected =
+      formatter.format(File(fact).readAsStringSync().replaceAll('\r\n', '\n'));
 
   expect(
     File(generated).readAsStringSync(),

packages/core/test_resources/actual_data/assets.gen.dart

@@ -90,10 +90,7 @@ class Assets {
 }
 
 class AssetGenImage extends AssetImage {
-  const AssetGenImage(String assetName)
-      : _assetName = assetName,
-        super(assetName, package: 'test');
-  final String _assetName;
+  const AssetGenImage(String assetName) : super(assetName, package: 'test');
 
   Image image({
     Key key,
@@ -138,7 +135,7 @@ class AssetGenImage extends AssetImage {
     );
   }
 
-  String get path => _assetName;
+  String get path => assetName;
 }
 
 class SvgGenImage {