test: profiler integration test

flutter/example/integration_test/profiling_test.dart

@@ -0,0 +1,64 @@
+import 'dart:convert';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:sentry_flutter/sentry_flutter.dart';
+import '../../../dart/test/mocks/mock_transport.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  final transport = MockTransport();
+
+  setUp(() async {
+    await SentryFlutter.init((options) {
+      // ignore: invalid_use_of_internal_member
+      options.devMode = true;
+      options.dsn = 'https://abc@def.ingest.sentry.io/1234567';
+      options.debug = true;
+      options.transport = transport;
+      options.tracesSampleRate = 1.0;
+      options.profilesSampleRate = 1.0;
+    });
+  });
+
+  tearDown(() async {
+    await Sentry.close();
+    transport.reset();
+  });
+
+  test('native binding is initialized', () async {
+    // ignore: invalid_use_of_internal_member
+    expect(SentryFlutter.native, isNotNull);
+  });
+
+  test('profile is captured', () async {
+    final tx = Sentry.startTransaction("name", "op");
+    await Future.delayed(const Duration(milliseconds: 1000));
+    await tx.finish();
+    expect(transport.calls, 1);
+
+    final envelope = transport.envelopes.first;
+    expect(envelope.items.length, 2);
+    expect(envelope.items[0].header.type, "transaction");
+    expect(await envelope.items[0].header.length(), greaterThan(0));
+    expect(envelope.items[1].header.type, "profile");
+    expect(await envelope.items[1].header.length(), greaterThan(0));
+
+    final txJson = utf8.decode(await envelope.items[0].dataFactory());
+    final txData = json.decode(txJson) as Map<String, dynamic>;
+
+    final profileJson = utf8.decode(await envelope.items[1].dataFactory());
+    final profileData = json.decode(profileJson) as Map<String, dynamic>;
+
+    expect(txData["event_id"], isNotNull);
+    expect(txData["event_id"], profileData["transaction"]["id"]);
+    expect(txData["contexts"]["trace"]["trace_id"], isNotNull);
+    expect(txData["contexts"]["trace"]["trace_id"],
+        profileData["transaction"]["trace_id"]);
+    expect(profileData["debug_meta"]["images"], isNotEmpty);
+    expect(profileData["profile"]["thread_metadata"], isNotEmpty);
+    expect(profileData["profile"]["samples"], isNotEmpty);
+    expect(profileData["profile"]["stacks"], isNotEmpty);
+    expect(profileData["profile"]["frames"], isNotEmpty);
+  });
+}

flutter/example/pubspec.yaml

@@ -36,6 +36,7 @@ dev_dependencies:
     sdk: flutter
   flutter_test:
     sdk: flutter
+  test: ^1.21.1
 
 flutter:
   uses-material-design: true

flutter/lib/src/profiling.dart

@@ -50,9 +50,6 @@ class NativeProfilerFactory implements ProfilerFactory {
     return NativeProfiler(_native, startTime, context.traceId, _clock);
   }
 }
-
-// TODO this may move to the native code in the future - instead of unit-testing,
-//      do an integration test once https://github.com/getsentry/sentry-dart/issues/1605 is done.
 // ignore: invalid_use_of_internal_member
 class NativeProfiler implements Profiler {
   final SentryNative _native;