require 'test/unit' require 'stringio' require 'tempfile' begin require 'zlib' rescue LoadError end if defined? Zlib class TestZlibDeflate < Test::Unit::TestCase def test_initialize z = Zlib::Deflate.new s = z.deflate("foo", Zlib::FINISH) assert_equal("foo", Zlib::Inflate.inflate(s)) z = Zlib::Deflate.new s = z.deflate("foo") s << z.deflate(nil, Zlib::FINISH) assert_equal("foo", Zlib::Inflate.inflate(s)) assert_raise(Zlib::StreamError) { Zlib::Deflate.new(10000) } end def test_dup z1 = Zlib::Deflate.new s = z1.deflate("foo") z2 = z1.dup s1 = s + z1.deflate("bar", Zlib::FINISH) s2 = s + z2.deflate("baz", Zlib::FINISH) assert_equal("foobar", Zlib::Inflate.inflate(s1)) assert_equal("foobaz", Zlib::Inflate.inflate(s2)) end def test_deflate s = Zlib::Deflate.deflate("foo") assert_equal("foo", Zlib::Inflate.inflate(s)) assert_raise(Zlib::StreamError) { Zlib::Deflate.deflate("foo", 10000) } end def test_addstr z = Zlib::Deflate.new z << "foo" s = z.deflate(nil, Zlib::FINISH) assert_equal("foo", Zlib::Inflate.inflate(s)) end def test_flush z = Zlib::Deflate.new z << "foo" s = z.flush z << "bar" s << z.flush_next_in z << "baz" s << z.flush_next_out s << z.deflate("qux", Zlib::FINISH) assert_equal("foobarbazqux", Zlib::Inflate.inflate(s)) end def test_avail z = Zlib::Deflate.new assert_equal(0, z.avail_in) assert_equal(0, z.avail_out) z << "foo" z.avail_out += 100 z << "bar" s = z.finish assert_equal("foobar", Zlib::Inflate.inflate(s)) end def test_total z = Zlib::Deflate.new 1000.times { z << "foo" } s = z.finish assert_equal(3000, z.total_in) assert_operator(3000, :>, z.total_out) assert_equal("foo" * 1000, Zlib::Inflate.inflate(s)) end def test_data_type z = Zlib::Deflate.new assert([Zlib::ASCII, Zlib::BINARY, Zlib::UNKNOWN].include?(z.data_type)) end def test_adler z = Zlib::Deflate.new z << "foo" z.finish assert_equal(0x02820145, z.adler) end def test_finished_p z = Zlib::Deflate.new assert_equal(false, z.finished?) z << "foo" assert_equal(false, z.finished?) z.finish assert_equal(true, z.finished?) z.close assert_raise(Zlib::Error) { z.finished? } end def test_closed_p z = Zlib::Deflate.new assert_equal(false, z.closed?) z << "foo" assert_equal(false, z.closed?) s = z.finish assert_equal(false, z.closed?) z.close assert_equal(true, z.closed?) end def test_params z = Zlib::Deflate.new z << "foo" z.params(Zlib::DEFAULT_COMPRESSION, Zlib::DEFAULT_STRATEGY) z << "bar" s = z.finish assert_equal("foobar", Zlib::Inflate.inflate(s)) data = ('a'..'z').to_a.join z = Zlib::Deflate.new(Zlib::NO_COMPRESSION, Zlib::MAX_WBITS, Zlib::DEF_MEM_LEVEL, Zlib::DEFAULT_STRATEGY) z << data[0, 10] z.params(Zlib::BEST_COMPRESSION, Zlib::DEFAULT_STRATEGY) z << data[10 .. -1] assert_equal(data, Zlib::Inflate.inflate(z.finish)) z = Zlib::Deflate.new s = z.deflate("foo", Zlib::FULL_FLUSH) z.avail_out = 0 z.params(Zlib::NO_COMPRESSION, Zlib::FILTERED) s << z.deflate("bar", Zlib::FULL_FLUSH) z.avail_out = 0 z.params(Zlib::BEST_COMPRESSION, Zlib::HUFFMAN_ONLY) s << z.deflate("baz", Zlib::FINISH) assert_equal("foobarbaz", Zlib::Inflate.inflate(s)) z = Zlib::Deflate.new assert_raise(Zlib::StreamError) { z.params(10000, 10000) } z.close # without this, outputs `zlib(finalizer): the stream was freed prematurely.' end def test_set_dictionary z = Zlib::Deflate.new z.set_dictionary("foo") s = z.deflate("foo" * 100, Zlib::FINISH) z = Zlib::Inflate.new assert_raise(Zlib::NeedDict) { z.inflate(s) } z.set_dictionary("foo") assert_equal("foo" * 100, z.inflate(s)) # ??? z = Zlib::Deflate.new z << "foo" assert_raise(Zlib::StreamError) { z.set_dictionary("foo") } z.close # without this, outputs `zlib(finalizer): the stream was freed prematurely.' end def test_reset z = Zlib::Deflate.new z << "foo" z.reset z << "bar" s = z.finish assert_equal("bar", Zlib::Inflate.inflate(s)) end def test_close z = Zlib::Deflate.new z.close assert_raise(Zlib::Error) { z << "foo" } assert_raise(Zlib::Error) { z.reset } end end class TestZlibInflate < Test::Unit::TestCase def test_initialize assert_raise(Zlib::StreamError) { Zlib::Inflate.new(-1) } s = Zlib::Deflate.deflate("foo") z = Zlib::Inflate.new z << s << nil assert_equal("foo", z.finish) end def test_add_dictionary dictionary = "foo" deflate = Zlib::Deflate.new deflate.set_dictionary dictionary compressed = deflate.deflate "foofoofoo", Zlib::FINISH deflate.close out = nil inflate = Zlib::Inflate.new inflate.add_dictionary "foo" out = inflate.inflate compressed assert_equal "foofoofoo", out end def test_inflate s = Zlib::Deflate.deflate("foo") z = Zlib::Inflate.new s = z.inflate(s) s << z.inflate(nil) assert_equal("foo", s) z.inflate("foo") # ??? z << "foo" # ??? end def test_inflate_dictionary dictionary = "foo" deflate = Zlib::Deflate.new deflate.set_dictionary dictionary compressed = deflate.deflate "foofoofoo", Zlib::FINISH deflate.close out = nil inflate = Zlib::Inflate.new begin out = inflate.inflate compressed flunk "Zlib::NeedDict was not raised" rescue Zlib::NeedDict inflate.set_dictionary dictionary out = inflate.inflate "" end assert_equal "foofoofoo", out end def test_sync z = Zlib::Deflate.new s = z.deflate("foo" * 1000, Zlib::FULL_FLUSH) z.avail_out = 0 z.params(Zlib::NO_COMPRESSION, Zlib::FILTERED) s << z.deflate("bar" * 1000, Zlib::FULL_FLUSH) z.avail_out = 0 z.params(Zlib::BEST_COMPRESSION, Zlib::HUFFMAN_ONLY) s << z.deflate("baz" * 1000, Zlib::FINISH) z = Zlib::Inflate.new assert_raise(Zlib::DataError) { z << "\0" * 100 } assert_equal(false, z.sync("")) assert_equal(false, z.sync_point?) z = Zlib::Inflate.new assert_raise(Zlib::DataError) { z << "\0" * 100 + s } assert_equal(true, z.sync("")) #assert_equal(true, z.sync_point?) z = Zlib::Inflate.new assert_equal(false, z.sync("\0" * 100)) assert_equal(false, z.sync_point?) z = Zlib::Inflate.new assert_equal(true, z.sync("\0" * 100 + s)) #assert_equal(true, z.sync_point?) end def test_set_dictionary z = Zlib::Inflate.new assert_raise(Zlib::StreamError) { z.set_dictionary("foo") } z.close end end class TestZlibGzipFile < Test::Unit::TestCase def test_to_io t = Tempfile.new("test_zlib_gzip_file_to_io") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } Zlib::GzipReader.open(t.path) do |f| assert_kind_of(IO, f.to_io) end end def test_crc t = Tempfile.new("test_zlib_gzip_file_crc") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } Zlib::GzipReader.open(t.path) do |f| f.read assert_equal(0x8c736521, f.crc) end end def test_mtime tim = Time.now t = Tempfile.new("test_zlib_gzip_file_mtime") t.close Zlib::GzipWriter.open(t.path) do |gz| gz.mtime = -1 gz.mtime = tim gz.print("foo") gz.flush assert_raise(Zlib::GzipFile::Error) { gz.mtime = Time.now } end Zlib::GzipReader.open(t.path) do |f| assert_equal(tim.to_i, f.mtime.to_i) end end def test_level t = Tempfile.new("test_zlib_gzip_file_level") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } Zlib::GzipReader.open(t.path) do |f| assert_equal(Zlib::DEFAULT_COMPRESSION, f.level) end end def test_os_code t = Tempfile.new("test_zlib_gzip_file_os_code") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } Zlib::GzipReader.open(t.path) do |f| assert_equal(Zlib::OS_CODE, f.os_code) end end def test_orig_name t = Tempfile.new("test_zlib_gzip_file_orig_name") t.close Zlib::GzipWriter.open(t.path) do |gz| gz.orig_name = "foobarbazqux\0quux" gz.print("foo") gz.flush assert_raise(Zlib::GzipFile::Error) { gz.orig_name = "quux" } end Zlib::GzipReader.open(t.path) do |f| assert_equal("foobarbazqux", f.orig_name) end end def test_comment t = Tempfile.new("test_zlib_gzip_file_comment") t.close Zlib::GzipWriter.open(t.path) do |gz| gz.comment = "foobarbazqux\0quux" gz.print("foo") gz.flush assert_raise(Zlib::GzipFile::Error) { gz.comment = "quux" } end Zlib::GzipReader.open(t.path) do |f| assert_equal("foobarbazqux", f.comment) end end def test_lineno t = Tempfile.new("test_zlib_gzip_file_lineno") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo\nbar\nbaz\nqux\n") } Zlib::GzipReader.open(t.path) do |f| assert_equal([0, "foo\n"], [f.lineno, f.gets]) assert_equal([1, "bar\n"], [f.lineno, f.gets]) f.lineno = 1000 assert_equal([1000, "baz\n"], [f.lineno, f.gets]) assert_equal([1001, "qux\n"], [f.lineno, f.gets]) end end def test_closed_p t = Tempfile.new("test_zlib_gzip_file_closed_p") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } Zlib::GzipReader.open(t.path) do |f| assert_equal(false, f.closed?) f.read assert_equal(false, f.closed?) f.close assert_equal(true, f.closed?) end end def test_sync t = Tempfile.new("test_zlib_gzip_file_sync") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } Zlib::GzipReader.open(t.path) do |f| f.sync = true assert_equal(true, f.sync) f.read f.sync = false assert_equal(false, f.sync) end end def test_pos t = Tempfile.new("test_zlib_gzip_file_pos") t.close Zlib::GzipWriter.open(t.path) do |gz| gz.print("foo") gz.flush assert_equal(3, gz.tell) end end def test_path t = Tempfile.new("test_zlib_gzip_file_path") t.close gz = Zlib::GzipWriter.open(t.path) gz.print("foo") assert_equal(t.path, gz.path) gz.close assert_equal(t.path, gz.path) Zlib::GzipReader.open(t.path) do |f| assert_equal(t.path, f.path) f.close assert_equal(t.path, f.path) end s = "" sio = StringIO.new(s) gz = Zlib::GzipWriter.new(sio) gz.print("foo") assert_raise(NoMethodError) { gz.path } gz.close sio = StringIO.new(s) Zlib::GzipReader.new(sio) do |f| assert_raise(NoMethodError) { f.path } end end end class TestZlibGzipReader < Test::Unit::TestCase D0 = "\037\213\010\000S`\017A\000\003\003\000\000\000\000\000\000\000\000\000" def test_read0 assert_equal("", Zlib::GzipReader.new(StringIO.new(D0)).read(0)) end def test_ungetc s = "" w = Zlib::GzipWriter.new(StringIO.new(s)) w << (1...1000).to_a.inspect w.close r = Zlib::GzipReader.new(StringIO.new(s)) r.read(100) r.ungetc ?a assert_nothing_raised("[ruby-dev:24060]") { r.read(100) r.read r.close } end def test_ungetc_paragraph s = "" w = Zlib::GzipWriter.new(StringIO.new(s)) w << "abc" w.close r = Zlib::GzipReader.new(StringIO.new(s)) r.ungetc ?\n assert_equal("abc", r.gets("")) assert_nothing_raised("[ruby-dev:24065]") { r.read r.close } end def test_open t = Tempfile.new("test_zlib_gzip_reader_open") t.close e = assert_raise(Zlib::GzipFile::Error) { Zlib::GzipReader.open(t.path) } assert_equal("not in gzip format", e.message) assert_nil(e.input) open(t.path, "wb") {|f| f.write("foo")} e = assert_raise(Zlib::GzipFile::Error) { Zlib::GzipReader.open(t.path) } assert_equal("not in gzip format", e.message) assert_equal("foo", e.input) open(t.path, "wb") {|f| f.write("foobarzothoge")} e = assert_raise(Zlib::GzipFile::Error) { Zlib::GzipReader.open(t.path) } assert_equal("not in gzip format", e.message) assert_equal("foobarzothoge", e.input) Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } assert_raise(ArgumentError) { Zlib::GzipReader.open } assert_equal("foo", Zlib::GzipReader.open(t.path) {|gz| gz.read }) f = Zlib::GzipReader.open(t.path) begin assert_equal("foo", f.read) ensure f.close end end def test_rewind t = Tempfile.new("test_zlib_gzip_reader_rewind") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } Zlib::GzipReader.open(t.path) do |f| assert_equal("foo", f.read) f.rewind assert_equal("foo", f.read) end end def test_unused t = Tempfile.new("test_zlib_gzip_reader_unused") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foobar") } Zlib::GzipReader.open(t.path) do |f| assert_equal(nil, f.unused) assert_equal("foo", f.read(3)) assert_equal(nil, f.unused) assert_equal("bar", f.read) assert_equal(nil, f.unused) end end def test_unused2 zio = StringIO.new io = Zlib::GzipWriter.new zio io.write 'aaaa' io.finish io = Zlib::GzipWriter.new zio io.write 'bbbb' io.finish zio.rewind io = Zlib::GzipReader.new zio assert_equal('aaaa', io.read) unused = io.unused assert_equal(24, unused.bytesize) io.finish zio.pos -= unused.length io = Zlib::GzipReader.new zio assert_equal('bbbb', io.read) assert_equal(nil, io.unused) io.finish end def test_read t = Tempfile.new("test_zlib_gzip_reader_read") t.close str = "\u3042\u3044\u3046" Zlib::GzipWriter.open(t.path) {|gz| gz.print(str) } Zlib::GzipReader.open(t.path, encoding: "UTF-8") do |f| assert_raise(ArgumentError) { f.read(-1) } assert_equal(str, f.read) end end def test_readpartial t = Tempfile.new("test_zlib_gzip_reader_readpartial") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foobar") } Zlib::GzipReader.open(t.path) do |f| assert("foo".start_with?(f.readpartial(3))) end Zlib::GzipReader.open(t.path) do |f| s = "" f.readpartial(3, s) assert("foo".start_with?(s)) assert_raise(ArgumentError) { f.readpartial(-1) } end end def test_getc t = Tempfile.new("test_zlib_gzip_reader_getc") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foobar") } Zlib::GzipReader.open(t.path) do |f| "foobar".each_char {|c| assert_equal(c, f.getc) } assert_nil(f.getc) end end def test_getbyte t = Tempfile.new("test_zlib_gzip_reader_getbyte") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foobar") } Zlib::GzipReader.open(t.path) do |f| "foobar".each_byte {|c| assert_equal(c, f.getbyte) } assert_nil(f.getbyte) end end def test_readchar t = Tempfile.new("test_zlib_gzip_reader_readchar") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foobar") } Zlib::GzipReader.open(t.path) do |f| "foobar".each_byte {|c| assert_equal(c, f.readchar.ord) } assert_raise(EOFError) { f.readchar } end end def test_each_byte t = Tempfile.new("test_zlib_gzip_reader_each_byte") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foobar") } Zlib::GzipReader.open(t.path) do |f| a = [] f.each_byte {|c| a << c } assert_equal("foobar".each_byte.to_a, a) end end def test_gets t = Tempfile.new("test_zlib_gzip_reader_gets") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo\nbar\nbaz\n") } Zlib::GzipReader.open(t.path) do |f| assert_equal("foo\n", f.gets) assert_equal("bar\n", f.gets) assert_equal("baz\n", f.gets) assert_nil(f.gets) end Zlib::GzipReader.open(t.path) do |f| assert_equal("foo\nbar\nbaz\n", f.gets(nil)) end Zlib::GzipReader.open(t.path) do |f| assert_equal("foo\n", f.gets(10)) assert_equal("ba", f.gets(2)) assert_equal("r\nb", f.gets(nil, 3)) assert_equal("az\n", f.gets(nil, 10)) assert_nil(f.gets) end end def test_gets2 t = Tempfile.new("test_zlib_gzip_reader_gets2") t.close ustrs = %W"\u{3042 3044 3046}\n \u{304b 304d 304f}\n \u{3055 3057 3059}\n" Zlib::GzipWriter.open(t.path) {|gz| gz.print(*ustrs) } Zlib::GzipReader.open(t.path, encoding: "UTF-8") do |f| assert_equal(ustrs[0], f.gets) assert_equal(ustrs[1], f.gets) assert_equal(ustrs[2], f.gets) assert_nil(f.gets) end Zlib::GzipReader.open(t.path, encoding: "UTF-8") do |f| assert_equal(ustrs.join(''), f.gets(nil)) end Zlib::GzipReader.open(t.path, encoding: "UTF-8") do |f| assert_equal(ustrs[0], f.gets(20)) assert_equal(ustrs[1][0,2], f.gets(5)) assert_equal(ustrs[1][2..-1]+ustrs[2][0,1], f.gets(nil, 5)) assert_equal(ustrs[2][1..-1], f.gets(nil, 20)) assert_nil(f.gets) end end def test_readline t = Tempfile.new("test_zlib_gzip_reader_readline") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo\nbar\nbaz\n") } Zlib::GzipReader.open(t.path) do |f| assert_equal("foo\n", f.readline) assert_equal("bar\n", f.readline) assert_equal("baz\n", f.readline) assert_raise(EOFError) { f.readline } end end def test_each t = Tempfile.new("test_zlib_gzip_reader_each") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo\nbar\nbaz\n") } Zlib::GzipReader.open(t.path) do |f| a = ["foo\n", "bar\n", "baz\n"] f.each {|l| assert_equal(a.shift, l) } end end def test_readlines t = Tempfile.new("test_zlib_gzip_reader_readlines") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo\nbar\nbaz\n") } Zlib::GzipReader.open(t.path) do |f| assert_equal(["foo\n", "bar\n", "baz\n"], f.readlines) end end def test_reader_wrap t = Tempfile.new("test_zlib_gzip_reader_wrap") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } f = open(t.path) f.binmode assert_equal("foo", Zlib::GzipReader.wrap(f) {|gz| gz.read }) assert_raise(IOError) { f.close } end def test_corrupted_header gz = Zlib::GzipWriter.new(StringIO.new(s = "")) gz.orig_name = "X" gz.comment = "Y" gz.print("foo") gz.finish # 14: magic(2) + method(1) + flag(1) + mtime(4) + exflag(1) + os(1) + orig_name(2) + comment(2) 1.upto(14) do |idx| assert_raise(Zlib::GzipFile::Error, idx) do Zlib::GzipReader.new(StringIO.new(s[0, idx])).read end end end def test_encoding t = Tempfile.new("test_zlib_gzip_reader_encoding") t.binmode content = (0..255).to_a.pack('c*') Zlib::GzipWriter.wrap(t) {|gz| gz.print(content) } t.close read_all = Zlib::GzipReader.open(t.path) {|gz| gz.read } assert_equal(Encoding.default_external, read_all.encoding) # chunks are in BINARY regardless of encoding settings read_size = Zlib::GzipReader.open(t.path) {|gz| gz.read(1024) } assert_equal(Encoding::ASCII_8BIT, read_size.encoding) assert_equal(content, read_size) end end class TestZlibGzipWriter < Test::Unit::TestCase def test_invalid_new assert_raise(NoMethodError, "[ruby-dev:23228]") { Zlib::GzipWriter.new(nil).close } assert_raise(NoMethodError, "[ruby-dev:23344]") { Zlib::GzipWriter.new(true).close } assert_raise(NoMethodError, "[ruby-dev:23344]") { Zlib::GzipWriter.new(0).close } assert_raise(NoMethodError, "[ruby-dev:23344]") { Zlib::GzipWriter.new(:hoge).close } end def test_open assert_raise(ArgumentError) { Zlib::GzipWriter.open } t = Tempfile.new("test_zlib_gzip_writer_open") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } assert_equal("foo", Zlib::GzipReader.open(t.path) {|gz| gz.read }) f = Zlib::GzipWriter.open(t.path) begin f.print("bar") ensure f.close end assert_equal("bar", Zlib::GzipReader.open(t.path) {|gz| gz.read }) assert_raise(Zlib::StreamError) { Zlib::GzipWriter.open(t.path, 10000) } end def test_write t = Tempfile.new("test_zlib_gzip_writer_write") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.print("foo") } assert_equal("foo", Zlib::GzipReader.open(t.path) {|gz| gz.read }) o = Object.new def o.to_s; "bar"; end Zlib::GzipWriter.open(t.path) {|gz| gz.print(o) } assert_equal("bar", Zlib::GzipReader.open(t.path) {|gz| gz.read }) end def test_putc t = Tempfile.new("test_zlib_gzip_writer_putc") t.close Zlib::GzipWriter.open(t.path) {|gz| gz.putc(?x) } assert_equal("x", Zlib::GzipReader.open(t.path) {|gz| gz.read }) # todo: multibyte char end def test_writer_wrap t = Tempfile.new("test_zlib_gzip_writer_wrap") t.binmode Zlib::GzipWriter.wrap(t) {|gz| gz.print("foo") } t.close assert_equal("foo", Zlib::GzipReader.open(t.path) {|gz| gz.read }) end end class TestZlib < Test::Unit::TestCase def test_version assert_instance_of(String, Zlib.zlib_version) assert(Zlib.zlib_version.tainted?) end def test_adler32 assert_equal(0x00000001, Zlib.adler32) assert_equal(0x02820145, Zlib.adler32("foo")) assert_equal(0x02820145, Zlib.adler32("o", Zlib.adler32("fo"))) assert_equal(0x8a62c964, Zlib.adler32("abc\x01\x02\x03" * 10000)) end def test_adler32_combine one = Zlib.adler32("fo") two = Zlib.adler32("o") begin assert_equal(0x02820145, Zlib.adler32_combine(one, two, 1)) rescue NotImplementedError skip "adler32_combine is not implemented" end end def test_crc32 assert_equal(0x00000000, Zlib.crc32) assert_equal(0x8c736521, Zlib.crc32("foo")) assert_equal(0x8c736521, Zlib.crc32("o", Zlib.crc32("fo"))) assert_equal(0x07f0d68f, Zlib.crc32("abc\x01\x02\x03" * 10000)) end def test_crc32_combine one = Zlib.crc32("fo") two = Zlib.crc32("o") begin assert_equal(0x8c736521, Zlib.crc32_combine(one, two, 1)) rescue NotImplementedError skip "crc32_combine is not implemented" end end def test_crc_table t = Zlib.crc_table assert_instance_of(Array, t) t.each {|x| assert_kind_of(Integer, x) } end end end