fails:File.open on a FIFO opens it as a normal file fails:File.open opens file when call with a block (basic case) fails:File.open opens a file with mode string and block fails:File.open opens a file with mode num and block fails:File.open opens the file when passed mode, num, permissions and block fails:File.open opens the file when call with fd fails:File.open opens a file with a file descriptor d and a block fails:File.open raises a SystemCallError if passed an invalid Integer type fails:File.open raises an IOError when read in a block opened with File::RDONLY|File::APPEND mode fails:File.open raises an IOError if the file exists when open with File::RDONLY|File::APPEND fails:File.open defaults external_encoding to ASCII-8BIT for binary modes fails:File.open when passed a file descriptor opens a file fails:File.open when passed a file descriptor opens a file when passed a block