tests: Add FuzzedAutoFileProvider which provides a CAutoFile interface to FuzzedDataProvider

Author: practicalswift

src/test/fuzz/util.h

@@ -383,4 +383,25 @@ NODISCARD inline FuzzedFileProvider ConsumeFile(FuzzedDataProvider& fuzzed_data_
     return {fuzzed_data_provider};
 }
 
+class FuzzedAutoFileProvider
+{
+    FuzzedDataProvider& m_fuzzed_data_provider;
+    FuzzedFileProvider m_fuzzed_file_provider;
+
+public:
+    FuzzedAutoFileProvider(FuzzedDataProvider& fuzzed_data_provider) : m_fuzzed_data_provider{fuzzed_data_provider}, m_fuzzed_file_provider{fuzzed_data_provider}
+    {
+    }
+
+    CAutoFile open()
+    {
+        return {m_fuzzed_file_provider.open(), m_fuzzed_data_provider.ConsumeIntegral<int>(), m_fuzzed_data_provider.ConsumeIntegral<int>()};
+    }
+};
+
+NODISCARD inline FuzzedAutoFileProvider ConsumeAutoFile(FuzzedDataProvider& fuzzed_data_provider) noexcept
+{
+    return {fuzzed_data_provider};
+}
+
 #endif // BITCOIN_TEST_FUZZ_UTIL_H