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local lexer = require "luacheck.lexer"
local function get_tokens(source)
local lexer_state = lexer.new_state(source)
local tokens = {}
repeat
local token = {}
token.token, token.token_value, token.line, token.column, token.offset = lexer.next_token(lexer_state)
tokens[#tokens+1] = token
until token.token == "eof"
return tokens
end
local function get_token(source)
local lexer_state = lexer.new_state(source)
local token = {}
token.token, token.token_value = lexer.next_token(lexer_state)
return token
end
local function maybe_error(lexer_state)
local ok, err, line, column, _, end_column = lexer.next_token(lexer_state)
return not ok and {msg = err, line = line, column = column, end_column = end_column}
end
local function get_error(source)
return maybe_error(lexer.new_state(source))
end
local function get_last_error(source)
local lexer_state = lexer.new_state(source)
local err
repeat
err = maybe_error(lexer_state)
until err
return err
end
describe("lexer", function()
describe("quote", function()
it("quotes strings", function()
assert.equal("'foo'", lexer.quote("foo"))
end)
it("escapes not printable characters", function()
assert.equal([['\0\1foo \240bar\127\10']], lexer.quote("\0\1foo \240bar\127\n"))
end)
end)
it("parses EOS correctly", function()
assert.same({token = "eof"}, get_token(" "))
end)
it("parses names correctly", function()
assert.same({token = "name", token_value = "foo"}, get_token("foo"))
assert.same({token = "name", token_value = "_"}, get_token("_"))
assert.same({token = "name", token_value = "foo1_2"}, get_token("foo1_2"))
assert.same({token = "name", token_value = "foo"}, get_token("foo!"))
end)
it("parses keywords correctly", function()
assert.same({token = "do"}, get_token("do"))
assert.same({token = "goto"}, get_token("goto fail;"))
end)
it("parses operators and special tokens correctly", function()
assert.same({token = "="}, get_token("= ="))
assert.same({token = "=="}, get_token("=="))
assert.same({token = "<"}, get_token("< ="))
assert.same({token = "<="}, get_token("<="))
assert.same({token = "<<"}, get_token("<<"))
assert.same({token = ">"}, get_token("> ="))
assert.same({token = ">="}, get_token(">="))
assert.same({token = ">>"}, get_token(">>"))
assert.same({token = "/"}, get_token("/ /"))
assert.same({token = "//"}, get_token("//"))
assert.same({token = "."}, get_token(".?."))
assert.same({token = "."}, get_token("."))
assert.same({token = ".."}, get_token("..%"))
assert.same({token = "...", token_value = "..."}, get_token("..."))
assert.same({token = ":"}, get_token(":.:"))
assert.same({token = "::"}, get_token("::."))
end)
it("parses single character tokens correctly", function()
assert.same({token = "("}, get_token("(("))
assert.same({token = "["}, get_token("[x]"))
assert.same({token = "$"}, get_token("$$$"))
end)
describe("when parsing short strings", function()
it("parses empty short strings correctly", function()
assert.same({token = "string", token_value = ""}, get_token([[""]]))
assert.same({token = "string", token_value = ""}, get_token([['']]))
end)
it("parses short strings containing quotation marks correctly", function()
assert.same({token = "string", token_value = "'"}, get_token([["'"]]))
assert.same({token = "string", token_value = '"'}, get_token([['"']]))
end)
it("parses simple short strings correctly", function()
assert.same({token = "string", token_value = "foo"}, get_token([["foo"]]))
end)
it("parses simple escape sequences correctly", function()
assert.same({token = "string", token_value = "\r\n"}, get_token([["\r\n"]]))
assert.same({token = "string", token_value = "foo\\bar"}, get_token([["foo\\bar"]]))
assert.same({token = "string", token_value = "a\'\'b\"\""}, get_token([["a\'\'b\"\""]]))
end)
it("parses escaped newline correctly", function()
assert.same({token = "string", token_value = "foo \nbar"}, get_token([["foo \
bar"]]))
assert.same({token = "string", token_value = "foo \n\n\nbar"}, get_token([["foo \
\
\
bar"]]))
end)
it("parses \\z correctly", function()
assert.same({token = "string", token_value = "foo "}, get_token([["foo \z"]]))
assert.same({token = "string", token_value = "foo bar"}, get_token([["foo \zbar"]]))
assert.same({token = "string", token_value = "foo bar"}, get_token([["foo \z bar"]]))
-- luacheck: ignore 612
assert.same({token = "string", token_value = "foo bar"}, get_token([["foo \z
bar\z "]]))
end)
it("parses decimal escape sequences correctly", function()
assert.same({token = "string", token_value = "\0buffer exploit"}, get_token([["\0buffer exploit"]]))
assert.same({token = "string", token_value = "foo bar"}, get_token([["foo b\97r"]]))
assert.same({token = "string", token_value = "\1234"}, get_token([["\1234"]]))
assert.same({line = 1, column = 2, end_column = 5, msg = "invalid decimal escape sequence '\\300'"}, get_error([["\300"]]))
assert.same({line = 1, column = 2, end_column = 2, msg = "invalid escape sequence '\\'"}, get_error([["\]]))
end)
it("parses hexadecimal escape sequences correctly", function()
assert.same({token = "string", token_value = "\0buffer exploit"}, get_token([["\x00buffer exploit"]]))
assert.same({token = "string", token_value = "foo bar"}, get_token([["foo\x20bar"]]))
assert.same({token = "string", token_value = "jj"}, get_token([["\x6a\x6A"]]))
assert.same({line = 1, column = 2, end_column = 3, msg = "invalid escape sequence '\\X'"}, get_error([["\XFF"]]))
assert.same({line = 1, column = 2, end_column = 4, msg = "invalid hexadecimal escape sequence '\\x\"'"}, get_error([["\x"]]))
assert.same({line = 1, column = 2, end_column = 5, msg = "invalid hexadecimal escape sequence '\\x1\"'"}, get_error([["\x1"]]))
assert.same({line = 1, column = 2, end_column = 4, msg = "invalid hexadecimal escape sequence '\\x1'"}, get_error([["\x1]]))
assert.same({line = 1, column = 2, end_column = 4, msg = "invalid hexadecimal escape sequence '\\xx'"}, get_error([["\xxx"]]))
end)
it("parses utf-8 escape sequences correctly", function()
assert.same({token = "string", token_value = "\0\0"},
get_token([["\u{0}\u{00000000}"]]))
assert.same({token = "string", token_value = "\0\127"},
get_token([["\u{0}\u{7F}"]]))
assert.same({token = "string", token_value = "\194\128\223\191"},
get_token([["\u{80}\u{7fF}"]]))
assert.same({token = "string", token_value = "\224\160\128\239\191\191"},
get_token([["\u{800}\u{FFFF}"]]))
assert.same({token = "string", token_value = "\240\144\128\128\244\143\191\191"},
get_token([["\u{10000}\u{10FFFF}"]]))
assert.same({line = 1, column = 2, end_column = 10, msg = "invalid UTF-8 escape sequence '\\u{110000'"}, get_error([["\u{110000}"]]))
assert.same({line = 1, column = 2, end_column = 4, msg = "invalid UTF-8 escape sequence '\\u\"'"}, get_error([["\u"]]))
assert.same({line = 1, column = 2, end_column = 4, msg = "invalid UTF-8 escape sequence '\\un'"}, get_error([["\unrelated"]]))
assert.same({line = 1, column = 2, end_column = 7, msg = "invalid UTF-8 escape sequence '\\u{11u'"}, get_error([["\u{11unrelated"]]))
assert.same({line = 1, column = 2, end_column = 6, msg = "invalid UTF-8 escape sequence '\\u{11'"}, get_error([["\u{11]]))
assert.same({line = 1, column = 2, end_column = 5, msg = "invalid UTF-8 escape sequence '\\u{u'"}, get_error([["\u{unrelated}"]]))
assert.same({line = 1, column = 2, end_column = 4, msg = "invalid UTF-8 escape sequence '\\u{'"}, get_error([["\u{]]))
end)
it("detects unknown escape sequences", function()
assert.same({line = 1, column = 2, end_column = 3, msg = "invalid escape sequence '\\c'"}, get_error([["\c"]]))
end)
it("detects unfinished strings", function()
assert.same({line = 1, column = 1, end_column = 1, msg = "unfinished string"}, get_error([["]]))
assert.same({line = 1, column = 1, end_column = 1, msg = "unfinished string"}, get_error([["']]))
assert.same({line = 1, column = 1, end_column = 1, msg = "unfinished string"}, get_error([["
"]]))
end)
end)
describe("when parsing long strings", function()
it("parses empty long strings correctly", function()
assert.same({token = "string", token_value = ""}, get_token("[[]]"))
assert.same({token = "string", token_value = ""}, get_token("[===[]===]"))
end)
it("parses simple long strings correctly", function()
assert.same({token = "string", token_value = "foo"}, get_token("[[foo]]"))
assert.same({token = "string", token_value = "'foo'\n'bar'\n"}, get_token("[===['foo'\n'bar'\n]===]"))
end)
it("skips first newline", function()
assert.same({token = "string", token_value = ""}, get_token("[[\n]]"))
assert.same({token = "string", token_value = "\n"}, get_token("[===[\n\n]===]"))
end)
it("ignores closing brackets of unrelated length", function()
assert.same({token = "string", token_value = "]=] "}, get_token("[[]=] ]]"))
assert.same({token = "string", token_value = "foo]]\n]=== ]]"}, get_token("[===[foo]]\n]=== ]]]===]"))
end)
it("detects invalid opening brackets", function()
assert.same({line = 1, column = 1, end_column = 1, msg = "invalid long string delimiter"}, get_error("[="))
assert.same({line = 1, column = 1, end_column = 1, msg = "invalid long string delimiter"}, get_error("[=|"))
end)
it("detects unfinished long strings", function()
assert.same({line = 1, column = 1, end_column = 1, msg = "unfinished long string"}, get_error("[=[\n"))
assert.same({line = 1, column = 1, end_column = 1, msg = "unfinished long string"}, get_error("[[]"))
end)
end)
describe("when parsing numbers", function()
it("parses decimal integers correctly", function()
assert.same({token = "number", token_value = "0"}, get_token("0"))
assert.same({token = "number", token_value = "123456789"}, get_token("123456789"))
end)
it("parses hexadecimal integers correctly", function()
assert.same({token = "number", token_value = "0x0"}, get_token("0x0"))
assert.same({token = "number", token_value = "0X0"}, get_token("0X0"))
assert.same({token = "number", token_value = "0xFfab"}, get_token("0xFfab"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x"))
end)
it("parses decimal floats correctly", function()
assert.same({token = "number", token_value = "0.0"}, get_token("0.0"))
assert.same({token = "number", token_value = "0."}, get_token("0."))
assert.same({token = "number", token_value = ".1234"}, get_token(".1234"))
end)
it("parses hexadecimal floats correctly", function()
assert.same({token = "number", token_value = "0xf.A"}, get_token("0xf.A"))
assert.same({token = "number", token_value = "0x9."}, get_token("0x9."))
assert.same({token = "number", token_value = "0x.b"}, get_token("0x.b"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x."))
end)
it("parses decimal floats with exponent correctly", function()
assert.same({token = "number", token_value = "1.8e1"}, get_token("1.8e1"))
assert.same({token = "number", token_value = ".8e-1"}, get_token(".8e-1"))
assert.same({token = "number", token_value = "1.E+20"}, get_token("1.E+20"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("1.8e"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("1.8e-"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("1.8E+"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("1.8ee"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("1.8e-e"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("1.8E+i"))
end)
it("parses hexadecimal floats with exponent correctly", function()
assert.same({token = "number", token_value = "0x1.8p1"}, get_token("0x1.8p1"))
assert.same({token = "number", token_value = "0x.8P-1"}, get_token("0x.8P-1"))
assert.same({token = "number", token_value = "0x1.p+20"}, get_token("0x1.p+20"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x1.8p"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x1.8p-"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x1.8P+"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x1.8pF"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x1.8p-F"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x1.8p+LL"))
assert.same({line = 1, column = 1, end_column = 1, msg = "malformed number"}, get_error("0x.p1"))
end)
it("parses 64 bits cdata literals correctly", function()
assert.same({token = "number", token_value = "1LL"}, get_token("1LL"))
assert.same({token = "number", token_value = "1ll"}, get_token("1ll"))
assert.same({token = "number", token_value = "1Ll"}, get_token("1Ll"))
assert.same({token = "number", token_value = "1lL"}, get_token("1lL"))
assert.same({token = "number", token_value = "1ULL"}, get_token("1ULL"))
assert.same({token = "number", token_value = "1uLl"}, get_token("1uLl"))
assert.same({token = "number", token_value = "1LLu"}, get_token("1LLu"))
assert.same({token = "number", token_value = "1"}, get_token("1L"))
assert.same({token = "number", token_value = "1LL"}, get_token("1LLG"))
assert.same({token = "number", token_value = "1"}, get_token("1LUL"))
assert.same({token = "number", token_value = "0x1LL"}, get_token("0x1LL"))
assert.same({token = "number", token_value = "1.0"}, get_token("1.0LL"))
end)
it("parses complex cdata literals correctly", function()
assert.same({token = "number", token_value = "1i"}, get_token("1i"))
assert.same({token = "number", token_value = "1I"}, get_token("1I"))
assert.same({token = "number", token_value = "1"}, get_token("1j"))
assert.same({token = "number", token_value = "1LL"}, get_token("1LLi"))
assert.same({token = "number", token_value = "0x1i"}, get_token("0x1i"))
assert.same({token = "number", token_value = "0x1.0i"}, get_token("0x1.0i"))
end)
end)
it("parses short comments correctly", function()
assert.same({token = "comment", token_value = ""}, get_token("--"))
assert.same({token = "comment", token_value = "foo"}, get_token("--foo\nbar"))
assert.same({token = "comment", token_value = "["}, get_token("--["))
assert.same({token = "comment", token_value = "[=foo"}, get_token("--[=foo\nbar"))
end)
it("parses long comments correctly", function()
assert.same({token = "comment", token_value = ""}, get_token("--[[]]"))
assert.same({token = "comment", token_value = ""}, get_token("--[[\n]]"))
assert.same({token = "comment", token_value = "foo\nbar"}, get_token("--[[foo\nbar]]"))
assert.same({line = 1, column = 1, end_column = 1, msg = "unfinished long comment"}, get_error("--[=[]]"))
end)
it("provides correct location info", function()
assert.same({
{token = "local", line = 1, column = 1, offset = 1},
{token = "function", line = 1, column = 7, offset = 7},
{token = "name", token_value = "foo", line = 1, column = 16, offset = 16},
{token = "(", line = 1, column = 19, offset = 19},
{token = "name", token_value = "bar", line = 1, column = 20, offset = 20},
{token = ")", line = 1, column = 23, offset = 23},
{token = "return", line = 2, column = 4, offset = 28},
{token = "name", token_value = "bar", line = 2, column = 11, offset = 35},
{token = ":", line = 2, column = 14, offset = 38},
{token = "name", token_value = "get_foo", line = 2, column = 15, offset = 39},
{token = "string", token_value = "long string\n", line = 2, column = 22, offset = 46},
{token = "end", line = 5, column = 1, offset = 66},
{token = "name", token_value = "print", line = 7, column = 1, offset = 71},
{token = "string", token_value = "123\n", line = 7, column = 7, offset = 77},
{token = "eof", line = 10, column = 1, offset = 105}
}, get_tokens([[
local function foo(bar)
return bar:get_foo[=[
long string
]=]
end
print "1\z
2\z
3\n"
]]))
end)
it("provides correct location info for errors", function()
assert.same({line = 7, column = 9, end_column = 10, msg = "invalid escape sequence '\\g'"}, get_last_error([[
local function foo(bar)
return bar:get_foo[=[
long string
]=]
end
print "1\g
2\z
3\n"
]]))
assert.same({line = 8, column = 9, end_column = 12, msg = "invalid decimal escape sequence '\\300'"}, get_last_error([[
local function foo(bar)
return bar:get_foo[=[
long string
]=]
end
print "1\
2\300
3\n"
]]))
assert.same({line = 8, column = 1, end_column = 1, msg = "malformed number"}, get_last_error([[
local function foo(bar)
return bar:get_foo[=[
long string
]=]
end
print (
0xx)
]]))
assert.same({line = 7, column = 7, end_column = 7, msg = "unfinished string"}, get_last_error([[
local function foo(bar)
return bar:get_foo[=[
long string
]=]
end
print "1\z
2\z
3\n
]]))
end)
it("parses minified source correctly", function()
assert.same({
{token = "name", token_value = "a", line = 1, column = 1, offset = 1},
{token = ",", line = 1, column = 2, offset = 2},
{token = "name", token_value = "b", line = 1, column = 3, offset = 3},
{token = "=", line = 1, column = 4, offset = 4},
{token = "number", token_value = "4ll", line = 1, column = 5, offset = 5},
{token = "name", token_value = "f", line = 1, column = 8, offset = 8},
{token = "=", line = 1, column = 9, offset = 9},
{token = "string", token_value = "", line = 1, column = 10, offset = 10},
{token = "function", line = 1, column = 12, offset = 12},
{token = "name", token_value = "_", line = 1, column = 21, offset = 21},
{token = "(", line = 1, column = 22, offset = 22},
{token = ")", line = 1, column = 23, offset = 23},
{token = "return", line = 1, column = 24, offset = 24},
{token = "number", token_value = "1", line = 1, column = 31, offset = 31},
{token = "or", line = 1, column = 32, offset = 32},
{token = "string", token_value = "", line = 1, column = 34, offset = 34},
{token = "end", line = 1, column = 36, offset = 36},
{token = "eof", line = 1, column = 39, offset = 39}
}, get_tokens("a,b=4llf=''function _()return 1or''end"))
end)
it("handles argparse sample", function()
get_tokens(io.open("spec/samples/argparse.lua", "rb"):read("*a"))
end)
end)
|
