bench: Avoid tmp files in pwd

src/bench/streams_findbyte.cpp

@@ -3,8 +3,8 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <bench/bench.h>
-
 #include <streams.h>
+#include <test/util/setup_common.h>
 #include <util/fs.h>
 
 #include <cstddef>
@@ -13,11 +13,11 @@
 
 static void FindByte(benchmark::Bench& bench)
 {
-    // Setup
-    AutoFile file{fsbridge::fopen("streams_tmp", "w+b")};
+    const auto testing_setup{MakeNoLogFileContext<const BasicTestingSetup>(ChainType::REGTEST)};
+    AutoFile file{fsbridge::fopen(testing_setup->m_path_root / "streams_tmp", "w+b")};
     const size_t file_size = 200;
     uint8_t data[file_size] = {0};
-    data[file_size-1] = 1;
+    data[file_size - 1] = 1;
     file << data;
     file.seek(0, SEEK_SET);
     BufferedFile bf{file, /*nBufSize=*/file_size + 1, /*nRewindIn=*/file_size};
@@ -27,9 +27,7 @@ static void FindByte(benchmark::Bench& bench)
         bf.FindByte(std::byte(1));
     });
 
-    // Cleanup
     assert(file.fclose() == 0);
-    fs::remove("streams_tmp");
 }
 
 BENCHMARK(FindByte, benchmark::PriorityLevel::HIGH);