51     let buffer = &mut [0u8; 100];  in test_file_long_write()  localVariable
55             buf: buffer.as_mut_ptr(),  in test_file_long_write()
56             buf_len: buffer.len(),  in test_file_long_write()
61     assert_eq!(nread, buffer.len(), "read first chunk");  in test_file_long_write()
63         buffer,  in test_file_long_write()
64         &content[..buffer.len()],  in test_file_long_write()
68     let end_cursor = content.len() - buffer.len();  in test_file_long_write()
75             buf: buffer.as_mut_ptr(),  in test_file_long_write()
76             buf_len: buffer.len(),  in test_file_long_write()
81     assert_eq!(nread, buffer.len(), "read end chunk len");  in test_file_long_write()
82     assert_eq!(buffer, &content[end_cursor..], "contents of end read chunk");  in test_file_long_write()