300 lines
9.3 KiB
Lua
300 lines
9.3 KiB
Lua
local ltn12 = require("ltn12")
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dofile("testsupport.lua")
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local function format(chunk)
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if chunk then
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if chunk == "" then return "''"
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else return string.len(chunk) end
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else return "nil" end
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end
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local function show(name, input, output)
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local sin = format(input)
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local sout = format(output)
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io.write(name, ": ", sin, " -> ", sout, "\n")
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end
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local function chunked(length)
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local tmp
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return function(chunk)
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local ret
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if chunk and chunk ~= "" then
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tmp = chunk
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end
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ret = string.sub(tmp, 1, length)
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tmp = string.sub(tmp, length+1)
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if not chunk and ret == "" then ret = nil end
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return ret
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end
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end
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local function named(f, name)
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return function(chunk)
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local ret = f(chunk)
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show(name, chunk, ret)
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return ret
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end
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end
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--------------------------------
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local function split(size)
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local buffer = ""
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local last_out = ""
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local last_in = ""
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local function output(chunk)
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local part = string.sub(buffer, 1, size)
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buffer = string.sub(buffer, size+1)
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last_out = (part ~= "" or chunk) and part
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last_in = chunk
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return last_out
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end
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return function(chunk, done)
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if done then
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return not last_in and not last_out
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end
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-- check if argument is consistent with state
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if not chunk then
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if last_in and last_in ~= "" and last_out ~= "" then
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error("nil chunk following data chunk", 2)
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end
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if not last_out then error("extra nil chunk", 2) end
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return output(chunk)
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elseif chunk == "" then
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if last_out == "" then error('extra "" chunk', 2) end
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if not last_out then error('"" chunk following nil return', 2) end
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if not last_in then error('"" chunk following nil chunk', 2) end
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return output(chunk)
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else
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if not last_in then error("data chunk following nil chunk", 2) end
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if last_in ~= "" and last_out ~= "" then
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error("data chunk following data chunk", 2)
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end
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buffer = chunk
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return output(chunk)
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end
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end
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end
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--------------------------------
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local function format(chunk)
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if chunk then
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if chunk == "" then return "''"
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else return string.len(chunk) end
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else return "nil" end
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end
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--------------------------------
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local function merge(size)
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local buffer = ""
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local last_out = ""
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local last_in = ""
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local function output(chunk)
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local part
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if string.len(buffer) >= size or not chunk then
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part = buffer
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buffer = ""
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else
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part = ""
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end
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last_out = (part ~= "" or chunk) and part
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last_in = chunk
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return last_out
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end
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return function(chunk, done)
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if done then
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return not last_in and not last_out
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end
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-- check if argument is consistent with state
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if not chunk then
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if last_in and last_in ~= "" and last_out ~= "" then
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error("nil chunk following data chunk", 2)
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end
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if not last_out then error("extra nil chunk", 2) end
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return output(chunk)
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elseif chunk == "" then
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if last_out == "" then error('extra "" chunk', 2) end
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if not last_out then error('"" chunk following nil return', 2) end
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if not last_in then error('"" chunk following nil chunk', 2) end
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return output(chunk)
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else
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if not last_in then error("data chunk following nil chunk", 2) end
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if last_in ~= "" and last_out ~= "" then
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error("data chunk following data chunk", 2)
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end
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buffer = buffer .. chunk
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return output(chunk)
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end
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end
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end
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--------------------------------
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io.write("testing sink.table: ")
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local sink, t = ltn12.sink.table()
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local s, c = "", ""
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for i = 0, 10 do
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c = string.rep(string.char(i), i)
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s = s .. c
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assert(sink(c), "returned error")
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end
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assert(sink(nil), "returned error")
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assert(table.concat(t) == s, "mismatch")
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print("ok")
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--------------------------------
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io.write("testing sink.chain (with split): ")
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sink, t = ltn12.sink.table()
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local filter = split(3)
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sink = ltn12.sink.chain(filter, sink)
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s = "123456789012345678901234567890"
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assert(sink(s), "returned error")
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assert(sink(s), "returned error")
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assert(sink(nil), "returned error")
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assert(table.concat(t) == s .. s, "mismatch")
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assert(filter(nil, 1), "filter not empty")
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print("ok")
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--------------------------------
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io.write("testing sink.chain (with merge): ")
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sink, t = ltn12.sink.table()
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filter = merge(10)
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sink = ltn12.sink.chain(filter, sink)
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s = string.rep("123", 30)
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s = s .. string.rep("4321", 30)
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for i = 1, 30 do
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assert(sink("123"), "returned error")
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end
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for i = 1, 30 do
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assert(sink("4321"), "returned error")
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end
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assert(sink(nil), "returned error")
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assert(filter(nil, 1), "filter not empty")
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assert(table.concat(t) == s, "mismatch")
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print("ok")
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--------------------------------
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io.write("testing source.string and pump.all: ")
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local source = ltn12.source.string(s)
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sink, t = ltn12.sink.table()
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assert(ltn12.pump.all(source, sink), "returned error")
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assert(table.concat(t) == s, "mismatch")
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print("ok")
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--------------------------------
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io.write("testing source.chain (with split): ")
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source = ltn12.source.string(s)
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filter = split(5)
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source = ltn12.source.chain(source, filter)
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sink, t = ltn12.sink.table()
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assert(ltn12.pump.all(source, sink), "returned error")
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assert(table.concat(t) == s, "mismatch")
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assert(filter(nil, 1), "filter not empty")
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print("ok")
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--------------------------------
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io.write("testing source.chain (with several filters): ")
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local function double(x) -- filter turning "ABC" into "AABBCC"
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if not x then return end
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local b={}
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for k in x:gmatch'.' do table.insert(b, k..k) end
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return table.concat(b)
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end
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source = ltn12.source.string(s)
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source = ltn12.source.chain(source, double, double, double)
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sink, t = ltn12.sink.table()
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assert(ltn12.pump.all(source, sink), "returned error")
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assert(table.concat(t) == double(double(double(s))), "mismatch")
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print("ok")
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--------------------------------
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io.write("testing source.chain (with split) and sink.chain (with merge): ")
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source = ltn12.source.string(s)
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filter = split(5)
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source = ltn12.source.chain(source, filter)
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local filter2 = merge(13)
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sink, t = ltn12.sink.table()
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sink = ltn12.sink.chain(filter2, sink)
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assert(ltn12.pump.all(source, sink), "returned error")
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assert(table.concat(t) == s, "mismatch")
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assert(filter(nil, 1), "filter not empty")
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assert(filter2(nil, 1), "filter2 not empty")
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print("ok")
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--------------------------------
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io.write("testing sink.chain (with several filters): ")
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source = ltn12.source.string(s)
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sink, t = ltn12.sink.table()
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sink = ltn12.sink.chain(double, double, double, sink)
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assert(ltn12.pump.all(source, sink), "returned error")
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assert(table.concat(t) == double(double(double(s))), "mismatch")
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print("ok")
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--------------------------------
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io.write("testing filter.chain (and sink.chain, with split, merge): ")
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source = ltn12.source.string(s)
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filter = split(5)
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filter2 = merge(13)
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local chain = ltn12.filter.chain(filter, filter2)
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sink, t = ltn12.sink.table()
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sink = ltn12.sink.chain(chain, sink)
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assert(ltn12.pump.all(source, sink), "returned error")
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assert(table.concat(t) == s, "mismatch")
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assert(filter(nil, 1), "filter not empty")
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assert(filter2(nil, 1), "filter2 not empty")
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print("ok")
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--------------------------------
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io.write("testing filter.chain (and sink.chain, a bunch): ")
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source = ltn12.source.string(s)
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filter = split(5)
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filter2 = merge(13)
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local filter3 = split(7)
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local filter4 = merge(11)
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local filter5 = split(10)
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chain = ltn12.filter.chain(filter, filter2, filter3, filter4, filter5)
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sink, t = ltn12.sink.table()
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sink = ltn12.sink.chain(chain, sink)
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assert(ltn12.pump.all(source, sink))
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assert(table.concat(t) == s, "mismatch")
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assert(filter(nil, 1), "filter not empty")
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assert(filter2(nil, 1), "filter2 not empty")
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assert(filter3(nil, 1), "filter3 not empty")
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assert(filter4(nil, 1), "filter4 not empty")
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assert(filter5(nil, 1), "filter5 not empty")
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print("ok")
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--------------------------------
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io.write("testing filter.chain (and source.chain, with split, merge): ")
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source = ltn12.source.string(s)
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filter = split(5)
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filter2 = merge(13)
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local chain = ltn12.filter.chain(filter, filter2)
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sink, t = ltn12.sink.table()
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source = ltn12.source.chain(source, chain)
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assert(ltn12.pump.all(source, sink), "returned error")
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assert(table.concat(t) == s, "mismatch")
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assert(filter(nil, 1), "filter not empty")
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assert(filter2(nil, 1), "filter2 not empty")
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print("ok")
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--------------------------------
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io.write("testing filter.chain (and source.chain, a bunch): ")
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source = ltn12.source.string(s)
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filter = split(5)
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filter2 = merge(13)
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local filter3 = split(7)
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local filter4 = merge(11)
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local filter5 = split(10)
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chain = ltn12.filter.chain(filter, filter2, filter3, filter4, filter5)
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sink, t = ltn12.sink.table()
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source = ltn12.source.chain(source, chain)
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assert(ltn12.pump.all(source, sink))
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assert(table.concat(t) == s, "mismatch")
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assert(filter(nil, 1), "filter not empty")
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assert(filter2(nil, 1), "filter2 not empty")
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assert(filter3(nil, 1), "filter3 not empty")
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assert(filter4(nil, 1), "filter4 not empty")
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assert(filter5(nil, 1), "filter5 not empty")
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print("ok")
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