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synced 2025-01-28 06:03:00 +08:00
264659bd53
The function 'string.gmatch' now has an optional 'init' argument, similar to 'string.find' and 'string.match'. Moreover, there was some reorganization in the manipulation of indices in the string library. This commit also includes small janitorial work in the manual and in comments in the interpreter loop.
388 lines
13 KiB
Lua
388 lines
13 KiB
Lua
-- $Id: testes/strings.lua $
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-- See Copyright Notice in file all.lua
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print('testing strings and string library')
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local maxi, mini = math.maxinteger, math.mininteger
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local function checkerror (msg, f, ...)
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local s, err = pcall(f, ...)
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assert(not s and string.find(err, msg))
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end
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-- testing string comparisons
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assert('alo' < 'alo1')
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assert('' < 'a')
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assert('alo\0alo' < 'alo\0b')
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assert('alo\0alo\0\0' > 'alo\0alo\0')
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assert('alo' < 'alo\0')
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assert('alo\0' > 'alo')
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assert('\0' < '\1')
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assert('\0\0' < '\0\1')
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assert('\1\0a\0a' <= '\1\0a\0a')
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assert(not ('\1\0a\0b' <= '\1\0a\0a'))
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assert('\0\0\0' < '\0\0\0\0')
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assert(not('\0\0\0\0' < '\0\0\0'))
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assert('\0\0\0' <= '\0\0\0\0')
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assert(not('\0\0\0\0' <= '\0\0\0'))
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assert('\0\0\0' <= '\0\0\0')
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assert('\0\0\0' >= '\0\0\0')
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assert(not ('\0\0b' < '\0\0a\0'))
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-- testing string.sub
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assert(string.sub("123456789",2,4) == "234")
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assert(string.sub("123456789",7) == "789")
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assert(string.sub("123456789",7,6) == "")
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assert(string.sub("123456789",7,7) == "7")
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assert(string.sub("123456789",0,0) == "")
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assert(string.sub("123456789",-10,10) == "123456789")
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assert(string.sub("123456789",1,9) == "123456789")
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assert(string.sub("123456789",-10,-20) == "")
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assert(string.sub("123456789",-1) == "9")
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assert(string.sub("123456789",-4) == "6789")
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assert(string.sub("123456789",-6, -4) == "456")
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assert(string.sub("123456789", mini, -4) == "123456")
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assert(string.sub("123456789", mini, maxi) == "123456789")
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assert(string.sub("123456789", mini, mini) == "")
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assert(string.sub("\000123456789",3,5) == "234")
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assert(("\000123456789"):sub(8) == "789")
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-- testing string.find
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assert(string.find("123456789", "345") == 3)
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a,b = string.find("123456789", "345")
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assert(string.sub("123456789", a, b) == "345")
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assert(string.find("1234567890123456789", "345", 3) == 3)
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assert(string.find("1234567890123456789", "345", 4) == 13)
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assert(string.find("1234567890123456789", "346", 4) == nil)
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assert(string.find("1234567890123456789", ".45", -9) == 13)
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assert(string.find("abcdefg", "\0", 5, 1) == nil)
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assert(string.find("", "") == 1)
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assert(string.find("", "", 1) == 1)
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assert(not string.find("", "", 2))
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assert(string.find('', 'aaa', 1) == nil)
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assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
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assert(string.len("") == 0)
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assert(string.len("\0\0\0") == 3)
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assert(string.len("1234567890") == 10)
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assert(#"" == 0)
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assert(#"\0\0\0" == 3)
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assert(#"1234567890" == 10)
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-- testing string.byte/string.char
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assert(string.byte("a") == 97)
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assert(string.byte("\xe4") > 127)
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assert(string.byte(string.char(255)) == 255)
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assert(string.byte(string.char(0)) == 0)
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assert(string.byte("\0") == 0)
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assert(string.byte("\0\0alo\0x", -1) == string.byte('x'))
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assert(string.byte("ba", 2) == 97)
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assert(string.byte("\n\n", 2, -1) == 10)
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assert(string.byte("\n\n", 2, 2) == 10)
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assert(string.byte("") == nil)
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assert(string.byte("hi", -3) == nil)
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assert(string.byte("hi", 3) == nil)
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assert(string.byte("hi", 9, 10) == nil)
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assert(string.byte("hi", 2, 1) == nil)
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assert(string.char() == "")
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assert(string.char(0, 255, 0) == "\0\255\0")
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assert(string.char(0, string.byte("\xe4"), 0) == "\0\xe4\0")
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assert(string.char(string.byte("\xe4l\0<EFBFBD>u", 1, -1)) == "\xe4l\0<EFBFBD>u")
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assert(string.char(string.byte("\xe4l\0<EFBFBD>u", 1, 0)) == "")
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assert(string.char(string.byte("\xe4l\0<EFBFBD>u", -10, 100)) == "\xe4l\0<EFBFBD>u")
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checkerror("out of range", string.char, 256)
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checkerror("out of range", string.char, -1)
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checkerror("out of range", string.char, math.maxinteger)
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checkerror("out of range", string.char, math.mininteger)
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assert(string.upper("ab\0c") == "AB\0C")
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assert(string.lower("\0ABCc%$") == "\0abcc%$")
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assert(string.rep('teste', 0) == '')
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assert(string.rep('t<EFBFBD>s\00t<EFBFBD>', 2) == 't<EFBFBD>s\0t<EFBFBD>t<EFBFBD>s\000t<EFBFBD>')
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assert(string.rep('', 10) == '')
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if string.packsize("i") == 4 then
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-- result length would be 2^31 (int overflow)
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checkerror("too large", string.rep, 'aa', (1 << 30))
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checkerror("too large", string.rep, 'a', (1 << 30), ',')
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end
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-- repetitions with separator
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assert(string.rep('teste', 0, 'xuxu') == '')
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assert(string.rep('teste', 1, 'xuxu') == 'teste')
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assert(string.rep('\1\0\1', 2, '\0\0') == '\1\0\1\0\0\1\0\1')
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assert(string.rep('', 10, '.') == string.rep('.', 9))
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assert(not pcall(string.rep, "aa", maxi // 2 + 10))
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assert(not pcall(string.rep, "", maxi // 2 + 10, "aa"))
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assert(string.reverse"" == "")
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assert(string.reverse"\0\1\2\3" == "\3\2\1\0")
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assert(string.reverse"\0001234" == "4321\0")
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for i=0,30 do assert(string.len(string.rep('a', i)) == i) end
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assert(type(tostring(nil)) == 'string')
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assert(type(tostring(12)) == 'string')
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assert(string.find(tostring{}, 'table:'))
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assert(string.find(tostring(print), 'function:'))
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assert(#tostring('\0') == 1)
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assert(tostring(true) == "true")
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assert(tostring(false) == "false")
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assert(tostring(-1203) == "-1203")
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assert(tostring(1203.125) == "1203.125")
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assert(tostring(-0.5) == "-0.5")
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assert(tostring(-32767) == "-32767")
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if math.tointeger(2147483647) then -- no overflow? (32 bits)
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assert(tostring(-2147483647) == "-2147483647")
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end
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if math.tointeger(4611686018427387904) then -- no overflow? (64 bits)
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assert(tostring(4611686018427387904) == "4611686018427387904")
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assert(tostring(-4611686018427387904) == "-4611686018427387904")
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end
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if tostring(0.0) == "0.0" then -- "standard" coercion float->string
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assert('' .. 12 == '12' and 12.0 .. '' == '12.0')
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assert(tostring(-1203 + 0.0) == "-1203.0")
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else -- compatible coercion
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assert(tostring(0.0) == "0")
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assert('' .. 12 == '12' and 12.0 .. '' == '12')
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assert(tostring(-1203 + 0.0) == "-1203")
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end
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x = '"<22>lo"\n\\'
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assert(string.format('%q%s', x, x) == '"\\"<22>lo\\"\\\n\\\\""<22>lo"\n\\')
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assert(string.format('%q', "\0") == [["\0"]])
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assert(load(string.format('return %q', x))() == x)
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x = "\0\1\0023\5\0009"
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assert(load(string.format('return %q', x))() == x)
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assert(string.format("\0%c\0%c%x\0", string.byte("\xe4"), string.byte("b"), 140) ==
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"\0\xe4\0b8c\0")
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assert(string.format('') == "")
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assert(string.format("%c",34)..string.format("%c",48)..string.format("%c",90)..string.format("%c",100) ==
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string.format("%c%c%c%c", 34, 48, 90, 100))
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assert(string.format("%s\0 is not \0%s", 'not be', 'be') == 'not be\0 is not \0be')
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assert(string.format("%%%d %010d", 10, 23) == "%10 0000000023")
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assert(tonumber(string.format("%f", 10.3)) == 10.3)
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x = string.format('"%-50s"', 'a')
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assert(#x == 52)
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assert(string.sub(x, 1, 4) == '"a ')
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assert(string.format("-%.20s.20s", string.rep("%", 2000)) ==
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"-"..string.rep("%", 20)..".20s")
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assert(string.format('"-%20s.20s"', string.rep("%", 2000)) ==
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string.format("%q", "-"..string.rep("%", 2000)..".20s"))
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do
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local function checkQ (v)
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local s = string.format("%q", v)
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local nv = load("return " .. s)()
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assert(v == nv and math.type(v) == math.type(nv))
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end
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checkQ("\0\0\1\255\u{234}")
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checkQ(math.maxinteger)
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checkQ(math.mininteger)
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checkQ(math.pi)
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checkQ(0.1)
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checkQ(true)
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checkQ(nil)
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checkQ(false)
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checkQ(math.huge)
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checkQ(-math.huge)
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assert(string.format("%q", 0/0) == "(0/0)") -- NaN
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checkerror("no literal", string.format, "%q", {})
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end
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assert(string.format("\0%s\0", "\0\0\1") == "\0\0\0\1\0")
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checkerror("contains zeros", string.format, "%10s", "\0")
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-- format x tostring
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assert(string.format("%s %s", nil, true) == "nil true")
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assert(string.format("%s %.4s", false, true) == "false true")
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assert(string.format("%.3s %.3s", false, true) == "fal tru")
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local m = setmetatable({}, {__tostring = function () return "hello" end,
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__name = "hi"})
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assert(string.format("%s %.10s", m, m) == "hello hello")
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getmetatable(m).__tostring = nil -- will use '__name' from now on
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assert(string.format("%.4s", m) == "hi: ")
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getmetatable(m).__tostring = function () return {} end
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checkerror("'__tostring' must return a string", tostring, m)
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assert(string.format("%x", 0.0) == "0")
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assert(string.format("%02x", 0.0) == "00")
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assert(string.format("%08X", 0xFFFFFFFF) == "FFFFFFFF")
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assert(string.format("%+08d", 31501) == "+0031501")
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assert(string.format("%+08d", -30927) == "-0030927")
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do -- longest number that can be formatted
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local i = 1
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local j = 10000
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while i + 1 < j do -- binary search for maximum finite float
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local m = (i + j) // 2
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if 10^m < math.huge then i = m else j = m end
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end
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assert(10^i < math.huge and 10^j == math.huge)
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local s = string.format('%.99f', -(10^i))
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assert(string.len(s) >= i + 101)
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assert(tonumber(s) == -(10^i))
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end
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-- testing large numbers for format
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do -- assume at least 32 bits
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local max, min = 0x7fffffff, -0x80000000 -- "large" for 32 bits
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assert(string.sub(string.format("%8x", -1), -8) == "ffffffff")
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assert(string.format("%x", max) == "7fffffff")
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assert(string.sub(string.format("%x", min), -8) == "80000000")
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assert(string.format("%d", max) == "2147483647")
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assert(string.format("%d", min) == "-2147483648")
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assert(string.format("%u", 0xffffffff) == "4294967295")
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assert(string.format("%o", 0xABCD) == "125715")
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max, min = 0x7fffffffffffffff, -0x8000000000000000
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if max > 2.0^53 then -- only for 64 bits
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assert(string.format("%x", (2^52 | 0) - 1) == "fffffffffffff")
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assert(string.format("0x%8X", 0x8f000003) == "0x8F000003")
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assert(string.format("%d", 2^53) == "9007199254740992")
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assert(string.format("%i", -2^53) == "-9007199254740992")
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assert(string.format("%x", max) == "7fffffffffffffff")
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assert(string.format("%x", min) == "8000000000000000")
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assert(string.format("%d", max) == "9223372036854775807")
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assert(string.format("%d", min) == "-9223372036854775808")
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assert(string.format("%u", ~(-1 << 64)) == "18446744073709551615")
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assert(tostring(1234567890123) == '1234567890123')
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end
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end
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do print("testing 'format %a %A'")
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local function matchhexa (n)
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local s = string.format("%a", n)
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-- result matches ISO C requirements
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assert(string.find(s, "^%-?0x[1-9a-f]%.?[0-9a-f]*p[-+]?%d+$"))
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assert(tonumber(s) == n) -- and has full precision
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s = string.format("%A", n)
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assert(string.find(s, "^%-?0X[1-9A-F]%.?[0-9A-F]*P[-+]?%d+$"))
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assert(tonumber(s) == n)
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end
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for _, n in ipairs{0.1, -0.1, 1/3, -1/3, 1e30, -1e30,
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-45/247, 1, -1, 2, -2, 3e-20, -3e-20} do
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matchhexa(n)
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end
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assert(string.find(string.format("%A", 0.0), "^0X0%.?0?P%+?0$"))
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assert(string.find(string.format("%a", -0.0), "^%-0x0%.?0?p%+?0$"))
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if not _port then -- test inf, -inf, NaN, and -0.0
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assert(string.find(string.format("%a", 1/0), "^inf"))
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assert(string.find(string.format("%A", -1/0), "^%-INF"))
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assert(string.find(string.format("%a", 0/0), "^%-?nan"))
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assert(string.find(string.format("%a", -0.0), "^%-0x0"))
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end
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if not pcall(string.format, "%.3a", 0) then
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(Message or print)("\n >>> modifiers for format '%a' not available <<<\n")
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else
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assert(string.find(string.format("%+.2A", 12), "^%+0X%x%.%x0P%+?%d$"))
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assert(string.find(string.format("%.4A", -12), "^%-0X%x%.%x000P%+?%d$"))
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end
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end
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-- errors in format
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local function check (fmt, msg)
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checkerror(msg, string.format, fmt, 10)
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end
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local aux = string.rep('0', 600)
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check("%100.3d", "too long")
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check("%1"..aux..".3d", "too long")
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check("%1.100d", "too long")
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check("%10.1"..aux.."004d", "too long")
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check("%t", "invalid conversion")
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check("%"..aux.."d", "repeated flags")
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check("%d %d", "no value")
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assert(load("return 1\n--comment without ending EOL")() == 1)
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checkerror("table expected", table.concat, 3)
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assert(table.concat{} == "")
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assert(table.concat({}, 'x') == "")
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assert(table.concat({'\0', '\0\1', '\0\1\2'}, '.\0.') == "\0.\0.\0\1.\0.\0\1\2")
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local a = {}; for i=1,300 do a[i] = "xuxu" end
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assert(table.concat(a, "123").."123" == string.rep("xuxu123", 300))
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assert(table.concat(a, "b", 20, 20) == "xuxu")
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assert(table.concat(a, "", 20, 21) == "xuxuxuxu")
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assert(table.concat(a, "x", 22, 21) == "")
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assert(table.concat(a, "3", 299) == "xuxu3xuxu")
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assert(table.concat({}, "x", maxi, maxi - 1) == "")
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assert(table.concat({}, "x", mini + 1, mini) == "")
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assert(table.concat({}, "x", maxi, mini) == "")
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assert(table.concat({[maxi] = "alo"}, "x", maxi, maxi) == "alo")
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assert(table.concat({[maxi] = "alo", [maxi - 1] = "y"}, "-", maxi - 1, maxi)
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== "y-alo")
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assert(not pcall(table.concat, {"a", "b", {}}))
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a = {"a","b","c"}
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assert(table.concat(a, ",", 1, 0) == "")
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assert(table.concat(a, ",", 1, 1) == "a")
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assert(table.concat(a, ",", 1, 2) == "a,b")
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assert(table.concat(a, ",", 2) == "b,c")
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assert(table.concat(a, ",", 3) == "c")
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assert(table.concat(a, ",", 4) == "")
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if not _port then
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local locales = { "ptb", "pt_BR.iso88591", "ISO-8859-1" }
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local function trylocale (w)
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for i = 1, #locales do
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if os.setlocale(locales[i], w) then
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print(string.format("'%s' locale set to '%s'", w, locales[i]))
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return locales[i]
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end
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end
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print(string.format("'%s' locale not found", w))
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return false
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end
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if trylocale("collate") then
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assert("alo" < "<EFBFBD>lo" and "<EFBFBD>lo" < "amo")
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end
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if trylocale("ctype") then
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assert(string.gsub("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>", "%a", "x") == "xxxxx")
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assert(string.gsub("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>", "%l", "x") == "x<EFBFBD>x<EFBFBD>")
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assert(string.gsub("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>", "%u", "x") == "<EFBFBD>x<EFBFBD>x")
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assert(string.upper"<EFBFBD><EFBFBD><EFBFBD>{xuxu}<7D><>o" == "<EFBFBD><EFBFBD><EFBFBD>{XUXU}<7D><>O")
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end
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os.setlocale("C")
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assert(os.setlocale() == 'C')
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assert(os.setlocale(nil, "numeric") == 'C')
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end
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-- bug in Lua 5.3.2
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-- 'gmatch' iterator does not work across coroutines
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do
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local f = string.gmatch("1 2 3 4 5", "%d+")
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assert(f() == "1")
|
||
co = coroutine.wrap(f)
|
||
assert(co() == "2")
|
||
end
|
||
|
||
print('OK')
|
||
|