Follow-up fix for dart-lang/build#2596 (#13)

.travis.yml

@@ -1,7 +1,7 @@
 language: dart
 
 dart:
-  - 2.2.0
+  - 2.6.0
   - dev
 
 dart_task:

pubspec.yaml

@@ -7,12 +7,12 @@ author: Kevin Moore <github@j832.com>
 homepage: https://github.com/kevmoo/source_gen_test
 
 environment:
-  sdk: '>=2.2.0 <3.0.0'
+  sdk: '>=2.6.0 <3.0.0'
 
 dependencies:
-  analyzer: '>=0.33.3 <0.40.0'
-  build: '>=0.12.6 <2.0.0'
-  build_test: ^0.10.0
+  analyzer: '>=0.35.3 <0.40.0'
+  build: ^1.2.2
+  build_test: ^0.10.12
   dart_style: ^1.2.0
   meta: ^1.0.2
   path: ^1.3.2

test/init_library_reader_test.dart

@@ -1,5 +1,6 @@
 import 'dart:io';
 
+import 'package:build/build.dart';
 import 'package:source_gen_test/src/init_library_reader.dart';
 import 'package:test/test.dart';
 
@@ -46,11 +47,12 @@ void main() {
     test('part instead', () async {
       await expectLater(
         () => initializeLibraryReaderForDirectory('test/src', 'test_part.dart'),
-        throwsA(isArgumentError
-            .having((ae) => ae.message, 'message',
-                'Does not seem to reference a Dart library.')
-            .having((ae) => ae.name, 'name', 'targetLibraryFileName')),
+        throwsA(isA<NonLibraryAssetException>().having(
+          (ae) => ae.assetId.toString(),
+          'assetId.toString()',
+          '__test__|lib/test_part.dart',
+        )),
       );
-    }, skip: 'See dart-lang/build#2596');
+    });
   });
 }