Add golden tests for all supported html elements

Author: Sub6Resources

test/golden_test.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_html/flutter_html.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'test_data.dart';
+
+class TestApp extends StatelessWidget {
+  final Widget body;
+
+  TestApp(this.body);
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        body: body,
+        appBar: AppBar(title: Text('flutter_html')),
+      ),
+    );
+  }
+}
+
+void testHtml(String name, String htmlData) {
+  testWidgets('$name golden test', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      TestApp(
+        Html(
+          data: htmlData,
+        ),
+      ),
+    );
+    await expectLater(find.byType(Html), matchesGoldenFile('goldens/$name.png'));
+  });
+}
+
+void main() {
+  testData.forEach((key, value) {
+    testHtml(key, value);
+  });
+}