92         if let Some(ref mut cacher) = self.cache {  in load()
106         if let Some(ref mut cacher) = self.cache {  in update_cache()
140         Ok(Some(ch))  in next()
152         Ok(Some(self.buf[self.cur]))  in peek()
189         if let Some(ref mut cacher) = self.cache {  in start_caching()
195             self.cache = Some(cache);  in start_caching()
331         assert_eq!(io_reader.next().unwrap(), Some(1));  in ut_io_reader_next()
335         assert_eq!(io_reader.next().unwrap(), Some(1));  in ut_io_reader_next()
366         assert_eq!(io_reader.peek().unwrap(), Some(1));  in ut_io_reader_peek()
367         assert_eq!(io_reader.peek().unwrap(), Some(1));  in ut_io_reader_peek()
368         assert_eq!(io_reader.next().unwrap(), Some(1));  in ut_io_reader_peek()
440         assert_eq!(io_reader.next().unwrap(), Some(1));  in ut_io_reader_position()
446         assert_eq!(io_reader.next().unwrap(), Some(b'\n'));  in ut_io_reader_position()
451         assert_eq!(io_reader.next().unwrap(), Some(2));  in ut_io_reader_position()
457         assert_eq!(io_reader.peek().unwrap(), Some(b'\n'));  in ut_io_reader_position()
463         assert_eq!(io_reader.peek().unwrap(), Some(3));  in ut_io_reader_position()
488         assert_eq!(io_reader.cached_len(), Some(0));  in ut_io_reader_start_caching()
490         assert_eq!(io_reader.next().unwrap(), Some(1));  in ut_io_reader_start_caching()
491         assert_eq!(io_reader.cached_len(), Some(1));  in ut_io_reader_start_caching()
493         assert_eq!(io_reader.cached_len(), Some(0));  in ut_io_reader_start_caching()
513         assert_eq!(io_reader.cached_len(), Some(0));  in ut_io_reader_cached_len()
533         assert_eq!(io_reader.cached_slice(), Some([].as_slice()));  in ut_io_reader_cached_slice()
544         assert_eq!(io_reader.next().unwrap(), Some(0));  in ut_io_reader_cached_slice()
545         assert_eq!(io_reader.next().unwrap(), Some(1));  in ut_io_reader_cached_slice()
546         assert_eq!(io_reader.cached_len(), Some(2));  in ut_io_reader_cached_slice()
566         assert_eq!(io_reader.cached_data(), Some(Vec::new()));  in ut_io_reader_cached_data()
603         assert_eq!(io_reader.take_cached_data(), Some(Vec::new()));  in ut_io_reader_take_cached_data()