test sample rate for feedback and fix mock transport calls comparison

dart/lib/src/sentry_client.dart

@@ -105,7 +105,7 @@ class SentryClient {
       return _emptySentryId;
     }
 
-    if (_sampleRate()) {
+    if (_sampleRate() && event.type != 'feedback') {
       _options.recorder
           .recordLostEvent(DiscardReason.sampleRate, _getCategory(event));
       _options.logger(

dart/test/mocks/mock_transport.dart

@@ -17,7 +17,7 @@ class MockTransport implements Transport {
   }
 
   bool called(int calls) {
-    return calls == calls;
+    return _calls == calls;
   }
 
   @override

dart/test/sentry_client_test.dart

@@ -1037,21 +1037,30 @@ void main() {
       final client = fixture.getSut(sampleRate: 1.0);
       await client.captureEvent(fakeEvent);
 
-      expect((fixture.transport).called(1), true);
+      expect(fixture.transport.called(1), true);
     });
 
     test('do not capture event, sample rate is 0% disabled', () async {
       final client = fixture.getSut(sampleRate: 0.0);
       await client.captureEvent(fakeEvent);
 
-      expect((fixture.transport).called(0), true);
+      expect(fixture.transport.called(0), true);
     });
 
     test('captures event, sample rate is null, disabled', () async {
       final client = fixture.getSut();
       await client.captureEvent(fakeEvent);
 
-      expect((fixture.transport).called(1), true);
+      expect(fixture.transport.called(1), true);
+    });
+
+    test('capture feedback event, sample rate is 0% disabled', () async {
+      final client = fixture.getSut(sampleRate: 0.0);
+
+      final fakeFeedback = fixture.fakeFeedback();
+      await client.captureFeedback(fakeFeedback);
+
+      expect(fixture.transport.called(1), true);
     });
   });