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Edit File : tar_test_case.rb \| Size : 3.65 KB
# 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" 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) ] h = arr.join 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 Back

Edit File : tar_test_case.rb | Size : 3.65 KB

# 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"
        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)
    ]

h = arr.join
    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

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