Merge pull request #571 from GetStream/feat/testTolerance

feat(ui): use custom golden comparator
2021-07-23 15:34:03 +02:00
parent 8cc85c6af1 8c3e8e0c12
commit ffd20dd00f
1 changed files with 26 additions and 0 deletions
@@ -1,9 +1,35 @@
 import 'dart:async';
+import 'dart:typed_data';

+import 'package:flutter/foundation.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:golden_toolkit/golden_toolkit.dart';

 Future<void> testExecutable(FutureOr<void> Function() testMain) async {
  await loadAppFonts();
+  goldenFileComparator =
+      CustomGoldenFileComparator(Uri.parse('test/src/goldens'));
  return testMain();
 }
+
+class CustomGoldenFileComparator extends LocalFileComparator {
+  CustomGoldenFileComparator(Uri testFile) : super(testFile);
+
+  @override
+  Future<bool> compare(Uint8List imageBytes, Uri golden) async {
+    final result = await GoldenFileComparator.compareLists(
+      imageBytes,
+      await getGoldenBytes(golden),
+    );
+
+    if (!result.passed && result.diffPercent > 0.05) {
+      final error = await generateFailureOutput(result, golden, basedir);
+      throw FlutterError(error);
+    }
+    return true;
+  }
+
+  @override
+  Future<void> update(Uri golden, Uint8List imageBytes) =>
+      super.update(golden, imageBytes);
+}