[enhancement](ut) add ut for buffered reader (#18667)

2023-04-16 18:08:22 +08:00
parent 70a418c4a8
commit 042cf2a1bf
5 changed files with 227 additions and 0 deletions
--- a/be/src/io/fs/buffered_reader.cpp
+++ b/be/src/io/fs/buffered_reader.cpp
@ -133,6 +133,7 @@ PrefetchBufferedReader::PrefetchBufferedReader(io::FileReaderSPtr reader, int64_
    }
    _size = _reader->size();
    _whole_pre_buffer_size = buffer_size;
+    _end_offset = std::min((size_t)_end_offset, _size);
    int buffer_num = buffer_size > s_max_pre_buffer_size ? buffer_size / s_max_pre_buffer_size : 1;
    // set the _cur_offset of this reader as same as the inner reader's,
    // to make sure the buffer reader will start to read at right position.