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-- $Id: strings.lua,v 1.86 2016/11/07 13:11:28 roberto Exp roberto $
-- See Copyright Notice in file all.lua
print('testing strings and string library')
local maxi, mini = math.maxinteger, math.mininteger
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
-- testing string comparisons
assert('alo' < 'alo1')
assert('' < 'a')
assert('alo\0alo' < 'alo\0b')
assert('alo\0alo\0\0' > 'alo\0alo\0')
assert('alo' < 'alo\0')
assert('alo\0' > 'alo')
assert('\0' < '\1')
assert('\0\0' < '\0\1')
assert('\1\0a\0a' <= '\1\0a\0a')
assert(not ('\1\0a\0b' <= '\1\0a\0a'))
assert('\0\0\0' < '\0\0\0\0')
assert(not('\0\0\0\0' < '\0\0\0'))
assert('\0\0\0' <= '\0\0\0\0')
assert(not('\0\0\0\0' <= '\0\0\0'))
assert('\0\0\0' <= '\0\0\0')
assert('\0\0\0' >= '\0\0\0')
assert(not ('\0\0b' < '\0\0a\0'))
-- testing string.sub
assert(string.sub("123456789",2,4) == "234")
assert(string.sub("123456789",7) == "789")
assert(string.sub("123456789",7,6) == "")
assert(string.sub("123456789",7,7) == "7")
assert(string.sub("123456789",0,0) == "")
assert(string.sub("123456789",-10,10) == "123456789")
assert(string.sub("123456789",1,9) == "123456789")
assert(string.sub("123456789",-10,-20) == "")
assert(string.sub("123456789",-1) == "9")
assert(string.sub("123456789",-4) == "6789")
assert(string.sub("123456789",-6, -4) == "456")
assert(string.sub("123456789", mini, -4) == "123456")
assert(string.sub("123456789", mini, maxi) == "123456789")
assert(string.sub("123456789", mini, mini) == "")
assert(string.sub("\000123456789",3,5) == "234")
assert(("\000123456789"):sub(8) == "789")
-- testing string.find
assert(string.find("123456789", "345") == 3)
a,b = string.find("123456789", "345")
assert(string.sub("123456789", a, b) == "345")
assert(string.find("1234567890123456789", "345", 3) == 3)
assert(string.find("1234567890123456789", "345", 4) == 13)
assert(string.find("1234567890123456789", "346", 4) == nil)
assert(string.find("1234567890123456789", ".45", -9) == 13)
assert(string.find("abcdefg", "\0", 5, 1) == nil)
assert(string.find("", "") == 1)
assert(string.find("", "", 1) == 1)
assert(not string.find("", "", 2))
assert(string.find('', 'aaa', 1) == nil)
assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
assert(string.len("") == 0)
assert(string.len("\0\0\0") == 3)
assert(string.len("1234567890") == 10)
assert(#"" == 0)
assert(#"\0\0\0" == 3)
assert(#"1234567890" == 10)
-- testing string.byte/string.char
assert(string.byte("a") == 97)
assert(string.byte("\xe4") > 127)
assert(string.byte(string.char(255)) == 255)
assert(string.byte(string.char(0)) == 0)
assert(string.byte("\0") == 0)
assert(string.byte("\0\0alo\0x", -1) == string.byte('x'))
assert(string.byte("ba", 2) == 97)
assert(string.byte("\n\n", 2, -1) == 10)
assert(string.byte("\n\n", 2, 2) == 10)
assert(string.byte("") == nil)
assert(string.byte("hi", -3) == nil)
assert(string.byte("hi", 3) == nil)
assert(string.byte("hi", 9, 10) == nil)
assert(string.byte("hi", 2, 1) == nil)
assert(string.char() == "")
assert(string.char(0, 255, 0) == "\0\255\0")
assert(string.char(0, string.byte("\xe4"), 0) == "\0\xe4\0")
assert(string.char(string.byte("\xe4l\0óu", 1, -1)) == "\xe4l\0óu")
assert(string.char(string.byte("\xe4l\0óu", 1, 0)) == "")
assert(string.char(string.byte("\xe4l\0óu", -10, 100)) == "\xe4l\0óu")
assert(string.upper("ab\0c") == "AB\0C")
assert(string.lower("\0ABCc%$") == "\0abcc%$")
assert(string.rep('teste', 0) == '')
assert(string.rep('tés\00tê', 2) == 'tés\0têtés\000tê')
assert(string.rep('', 10) == '')
if string.packsize("i") == 4 then
-- result length would be 2^31 (int overflow)
checkerror("too large", string.rep, 'aa', (1 << 30))
checkerror("too large", string.rep, 'a', (1 << 30), ',')
end
-- repetitions with separator
assert(string.rep('teste', 0, 'xuxu') == '')
assert(string.rep('teste', 1, 'xuxu') == 'teste')
assert(string.rep('\1\0\1', 2, '\0\0') == '\1\0\1\0\0\1\0\1')
assert(string.rep('', 10, '.') == string.rep('.', 9))
assert(not pcall(string.rep, "aa", maxi // 2 + 10))
assert(not pcall(string.rep, "", maxi // 2 + 10, "aa"))
assert(string.reverse"" == "")
assert(string.reverse"\0\1\2\3" == "\3\2\1\0")
assert(string.reverse"\0001234" == "4321\0")
for i=0,30 do assert(string.len(string.rep('a', i)) == i) end
assert(type(tostring(nil)) == 'string')
assert(type(tostring(12)) == 'string')
assert(string.find(tostring{}, 'table:'))
assert(string.find(tostring(print), 'function:'))
assert(#tostring('\0') == 1)
assert(tostring(true) == "true")
assert(tostring(false) == "false")
assert(tostring(-1203) == "-1203")
assert(tostring(1203.125) == "1203.125")
assert(tostring(-0.5) == "-0.5")
assert(tostring(-32767) == "-32767")
if math.tointeger(2147483647) then -- no overflow? (32 bits)
assert(tostring(-2147483647) == "-2147483647")
end
if math.tointeger(4611686018427387904) then -- no overflow? (64 bits)
assert(tostring(4611686018427387904) == "4611686018427387904")
assert(tostring(-4611686018427387904) == "-4611686018427387904")
end
if tostring(0.0) == "0.0" then -- "standard" coercion float->string
assert('' .. 12 == '12' and 12.0 .. '' == '12.0')
assert(tostring(-1203 + 0.0) == "-1203.0")
else -- compatible coercion
assert(tostring(0.0) == "0")
assert('' .. 12 == '12' and 12.0 .. '' == '12')
assert(tostring(-1203 + 0.0) == "-1203")
end
x = '"ílo"\n\\'
assert(string.format('%q%s', x, x) == '"\\"ílo\\"\\\n\\\\""ílo"\n\\')
assert(string.format('%q', "\0") == [["\0"]])
assert(load(string.format('return %q', x))() == x)
x = "\0\1\0023\5\0009"
assert(load(string.format('return %q', x))() == x)
assert(string.format("\0%c\0%c%x\0", string.byte("\xe4"), string.byte("b"), 140) ==
"\0\xe4\0b8c\0")
assert(string.format('') == "")
assert(string.format("%c",34)..string.format("%c",48)..string.format("%c",90)..string.format("%c",100) ==
string.format("%c%c%c%c", 34, 48, 90, 100))
assert(string.format("%s\0 is not \0%s", 'not be', 'be') == 'not be\0 is not \0be')
assert(string.format("%%%d %010d", 10, 23) == "%10 0000000023")
assert(tonumber(string.format("%f", 10.3)) == 10.3)
x = string.format('"%-50s"', 'a')
assert(#x == 52)
assert(string.sub(x, 1, 4) == '"a ')
assert(string.format("-%.20s.20s", string.rep("%", 2000)) ==
"-"..string.rep("%", 20)..".20s")
assert(string.format('"-%20s.20s"', string.rep("%", 2000)) ==
string.format("%q", "-"..string.rep("%", 2000)..".20s"))
do
local function checkQ (v)
local s = string.format("%q", v)
local nv = load("return " .. s)()
assert(v == nv and math.type(v) == math.type(nv))
end
checkQ("\0\0\1\255\u{234}")
checkQ(math.maxinteger)
checkQ(math.mininteger)
checkQ(math.pi)
checkQ(0.1)
checkQ(true)
checkQ(nil)
checkQ(false)
checkerror("no literal", string.format, "%q", {})
end
assert(string.format("\0%s\0", "\0\0\1") == "\0\0\0\1\0")
checkerror("contains zeros", string.format, "%10s", "\0")
-- format x tostring
assert(string.format("%s %s", nil, true) == "nil true")
assert(string.format("%s %.4s", false, true) == "false true")
assert(string.format("%.3s %.3s", false, true) == "fal tru")
local m = setmetatable({}, {__tostring = function () return "hello" end,
__name = "hi"})
assert(string.format("%s %.10s", m, m) == "hello hello")
getmetatable(m).__tostring = nil -- will use '__name' from now on
assert(string.format("%.4s", m) == "hi: ")
getmetatable(m).__tostring = function () return {} end
checkerror("'__tostring' must return a string", tostring, m)
assert(string.format("%x", 0.0) == "0")
assert(string.format("%02x", 0.0) == "00")
assert(string.format("%08X", 0xFFFFFFFF) == "FFFFFFFF")
assert(string.format("%+08d", 31501) == "+0031501")
assert(string.format("%+08d", -30927) == "-0030927")
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