JezK
Edit File: tar_test_case.rb
# frozen_string_literal: true require 'rubygems/test_case' require 'rubygems/package' ## # A test case for Gem::Package::Tar* classes class Gem::Package::TarTestCase < Gem::TestCase def ASCIIZ(str, length) str + "\0" * (length - str.length) end def SP(s) s + " " end def SP_Z(s) s + " \0" end def Z(s) s + "\0" end def assert_headers_equal(expected, actual) expected = expected.to_s unless String === expected actual = actual.to_s unless String === actual fields = %w[ name 100 mode 8 uid 8 gid 8 size 12 mtime 12 checksum 8 typeflag 1 linkname 100 magic 6 version 2 uname 32 gname 32 devmajor 8 devminor 8 prefix 155 ] offset = 0 until fields.empty? do name = fields.shift length = fields.shift.to_i if name == "checksum" then chksum_off = offset offset += length next end assert_equal expected[offset, length], actual[offset, length], "Field #{name} of the tar header differs." offset += length end assert_equal expected[chksum_off, 8], actual[chksum_off, 8] end def calc_checksum(header) sum = header.unpack("C*").inject{|s,a| s + a} SP(Z(to_oct(sum, 6))) end def header(type, fname, dname, length, mode, mtime, checksum = nil, linkname = "") checksum ||= " " * 8 arr = [ # struct tarfile_entry_posix ASCIIZ(fname, 100), # char name[100]; ASCII + (Z unless filled) Z(to_oct(mode, 7)), # char mode[8]; 0 padded, octal null Z(to_oct(0, 7)), # char uid[8]; ditto Z(to_oct(0, 7)), # char gid[8]; ditto Z(to_oct(length, 11)), # char size[12]; 0 padded, octal, null Z(to_oct(mtime, 11)), # char mtime[12]; 0 padded, octal, null checksum, # char checksum[8]; 0 padded, octal, null, space type, # char typeflag[1]; file: "0" dir: "5" ASCIIZ(linkname, 100), # char linkname[100]; ASCII + (Z unless filled) "ustar\0", # char magic[6]; "ustar\0" "00", # char version[2]; "00" ASCIIZ("wheel", 32), # char uname[32]; ASCIIZ ASCIIZ("wheel", 32), # char gname[32]; ASCIIZ Z(to_oct(0, 7)), # char devmajor[8]; 0 padded, octal, null Z(to_oct(0, 7)), # char devminor[8]; 0 padded, octal, null ASCIIZ(dname, 155) # char prefix[155]; ASCII + (Z unless filled) ] format = "C100C8C8C8C12C12C8CC100C6C2C32C32C8C8C155" h = if RUBY_VERSION >= "1.9" then arr.join else arr = arr.join("").split(//).map{|x| x[0]} arr.pack format end ret = h + "\0" * (512 - h.size) assert_equal(512, ret.size) ret end def tar_dir_header(name, prefix, mode, mtime) h = header("5", name, prefix, 0, mode, mtime) checksum = calc_checksum(h) header("5", name, prefix, 0, mode, mtime, checksum) end def tar_file_header(fname, dname, mode, length, mtime) h = header("0", fname, dname, length, mode, mtime) checksum = calc_checksum(h) header("0", fname, dname, length, mode, mtime, checksum) end def tar_symlink_header(fname, prefix, mode, mtime, linkname) h = header("2", fname, prefix, 0, mode, mtime, nil, linkname) checksum = calc_checksum(h) header("2", fname, prefix, 0, mode, mtime, checksum, linkname) end def to_oct(n, pad_size) "%0#{pad_size}o" % n end def util_entry(tar) io = TempIO.new tar header = Gem::Package::TarHeader.from io Gem::Package::TarReader::Entry.new header, io end def util_dir_entry util_entry tar_dir_header("foo", "bar", 0, Time.now) end def util_symlink_entry util_entry tar_symlink_header("foo", "bar", 0, Time.now, "link") end end