Add simple unit test framework and various other improvements/changes:

* Move logger.lua;
* update quotation style in several files;
* add proposed configuration key layout to conf_defaults.lua;
* move dump function to utils.lua;
* implement (very) basic unit testing environment;
* fix bugs in various functions in utils.lua;
* checkin of preliminary REST API test code.

src/conf_defaults.lua

@@ -0,0 +1,34 @@
+local M = {}
+
+--NOTE: pcall protects from invocation exceptions, which is what we need except
+--during debugging. This flag replaces them with a normal call so we can inspect stack traces.
+M.DEBUG_PCALLS = true
+
+--REST responses will contain 'module' and 'function' keys describing what was requested
+M.API_INCLUDE_ENDPOINT_INFO = false
+
+M.DEFAULT_AP_SSID = "d3d-ap-%MAC_ADDR_TAIL%"
+M.DEFAULT_AP_ADDRESS = "192.168.10.1"
+M.DEFAULT_AP_NETMASK = "255.255.255.0"
+
+
+--NOTE: proposed notation for baseline configuration (containing defaults as well as type and constraint information)
+--the table name is the configuration key; min, max and regex are all optional; type is one of: {int, float, string, ...?}
+M.temperature = {
+	default = 230,
+	type = 'int',
+	description = '...xyzzy',
+	min = 0,
+	max = 350
+}
+
+M.ssid = {
+	default = 'd3d-ap-%%MAC_TAIL%%',
+	type = 'int', --one of: {int, float, string, ...?}
+	min = 1,
+	max = 32,
+	regex = '[a-zA-Z0-9 -=+]+'
+}
+
+
+return M

src/config.lua

@@ -1,14 +0,0 @@
-local M = {}
-
---NOTE: pcall protects from invocation exceptions, which is what we need except
---during debugging. This flag replaces them with a normal call so we can inspect stack traces.
-M.DEBUG_PCALLS = true
-
---REST responses will contain 'module' and 'function' keys describing what was requested
-M.API_INCLUDE_ENDPOINT_INFO = false
-
-M.DEFAULT_AP_SSID = "d3d-ap-%MAC_ADDR_TAIL%"
-M.DEFAULT_AP_ADDRESS = "192.168.10.1"
-M.DEFAULT_AP_NETMASK = "255.255.255.0"
-
-return M

src/main.lua

@@ -1,11 +1,12 @@
 package.path = package.path .. ';/usr/share/lua/wifibox/?.lua'
 
-local l = require("logger")
-local RequestClass = require("rest.request")
-local ResponseClass = require("rest.response")
-local wifi = require("network.wlanconfig")
-local netconf = require("network.netconfig")
-local config = require("config")
+local config = require('config')
+local u = require('util.utils')
+local l = require('util.logger')
+local wifi = require('network.wlanconfig')
+local netconf = require('network.netconfig')
+local RequestClass = require('rest.request')
+local ResponseClass = require('rest.response')
 
 local postData = nil
 
@@ -22,8 +23,8 @@ local function init()
 	else l:info("Wifibox CGI handler started")
 	end
 	
-	if (os.getenv("REQUEST_METHOD") == "POST") then
-		local n = tonumber(os.getenv("CONTENT_LENGTH"))
+	if (os.getenv('REQUEST_METHOD') == 'POST') then
+		local n = tonumber(os.getenv('CONTENT_LENGTH'))
 		postData = io.read(n)
 	end
 	
@@ -41,14 +42,14 @@ end
 	local rq = RequestClass.new(postData, config.DEBUG_PCALLS)
 	
 	l:info("received request of type " .. rq:getRequestMethod() .. " for " .. (rq:getRequestedApiModule() or "<unknown>")
-			.. "/" .. (rq:getRealApiFunctionName() or "<unknown>") .. " with arguments: " .. l:dump(rq:getAll()))
-	if rq:getRequestMethod() ~= "CMDLINE" then
+			.. "/" .. (rq:getRealApiFunctionName() or "<unknown>") .. " with arguments: " .. u.dump(rq:getAll()))
+	if rq:getRequestMethod() ~= 'CMDLINE' then
 		l:info("remote IP/port: " .. rq:getRemoteHost() .. "/" .. rq:getRemotePort())
 		l:debug("user agent: " .. rq:getUserAgent())
 	end
 	
-	if (not config.DEBUG_PCALLS and rq:getRequestMethod() == "CMDLINE") then
-		if rq:get("autowifi") ~= nil then
+	if (not config.DEBUG_PCALLS and rq:getRequestMethod() == 'CMDLINE') then
+		if rq:get('autowifi') ~= nil then
 			setupAutoWifiMode()
 		else
 			l:info("Nothing to do...bye.\n")

src/network/netconfig.lua

@@ -1,6 +1,6 @@
 local config = require("config")
 local u = require("util.utils")
-local l = require("logger")
+local l = require("util.logger")
 local uci = require("uci").cursor()
 
 local M = {}

src/network/wlanconfig.lua

@@ -1,5 +1,5 @@
 local util = require("util.utils")
-local l = require("logger")
+local l = require("util.logger")
 local uci = require("uci").cursor()
 local iwinfo = require("iwinfo")
 

src/rest/api/api_network.lua

@@ -1,6 +1,6 @@
 local config = require("config")
-local l = require("logger")
 local u = require("util.utils")
+local l = require("util.logger")
 local netconf = require("network.netconfig")
 local wifi = require("network.wlanconfig")
 local ResponseClass = require("rest.response")
@@ -36,7 +36,7 @@ function M.available(request, response)
 				netInfo["signal"] = se.signal
 				netInfo["quality"] = se.quality
 				netInfo["quality_max"] = se.quality_max
-				if withRaw then netInfo["_raw"] = l:dump(se) end
+				if withRaw then netInfo["_raw"] = u.dump(se) end
 				
 				table.insert(netInfoList, netInfo)
 			end
@@ -63,7 +63,7 @@ function M.known(request, response)
 			netInfo["bssid"] = net.bssid or ""
 			netInfo["channel"] = net.channel or ""
 			netInfo["encryption"] = net.encryption
-			if withRaw then netInfo["_raw"] = l:dump(net) end
+			if withRaw then netInfo["_raw"] = u.dump(net) end
 			table.insert(netInfoList, netInfo)
 		end
 	end
@@ -87,7 +87,7 @@ function M.state(request, response)
 	response:addData("txpower", ds.txpower)
 	response:addData("signal", ds.signal)
 	response:addData("noise", ds.noise)
-	if withRaw then response:addData("_raw", l:dump(ds)) end
+	if withRaw then response:addData("_raw", u.dump(ds)) end
 end
 
 --UNTESTED

src/rest/api/api_test.lua

@@ -1,4 +1,4 @@
-local l = require("logger")
+local l = require("util.logger")
 local ResponseClass = require("rest.response")
 
 local M = {}

src/test/ansicolors.lua

@@ -0,0 +1,63 @@
+-- adapted from: http://lua-users.org/wiki/AnsiTerminalColors
+local pairs = pairs
+local tostring = tostring
+local setmetatable = setmetatable
+local schar = string.char
+
+local colormt = {}
+
+function colormt:__tostring()
+	return self.value
+end
+
+function colormt:__concat(other)
+	return tostring(self) .. tostring(other)
+end
+
+function colormt:__call(s)
+	return self .. s .. colormt.reset
+end
+
+colormt.__metatable = {}
+
+local function makecolor(value)
+	return setmetatable({ value = schar(27) .. '[' .. tostring(value) .. 'm' }, colormt)
+end
+
+local colors = {
+	-- attributes
+	reset = 0,
+	clear = 0,
+	bright = 1,
+	dim = 2,
+	underscore = 4,
+	blink = 5,
+	reverse = 7,
+	hidden = 8,
+
+	-- foreground
+	black = 30,
+	red = 31,
+	green = 32,
+	yellow = 33,
+	blue = 34,
+	magenta = 35,
+	cyan = 36,
+	white = 37,
+
+	-- background
+	onblack = 40,
+	onred = 41,
+	ongreen = 42,
+	onyellow = 43,
+	onblue = 44,
+	onmagenta = 45,
+	oncyan = 46,
+	onwhite = 47,
+}
+
+for c, v in pairs(colors) do
+	colormt[c] = makecolor(v)
+end
+
+return colormt

src/test/test_utils.lua

@@ -0,0 +1,105 @@
+local utils = require("util.utils")
+
+local M = {
+	_is_test = true,
+	_skip = { 'dump', 'symlink', 'getUciSectionName', 'symlinkInRoot' },
+	_wifibox_only = { 'getUciSectionName', 'symlinkInRoot' }
+}
+
+local function compareTables(t1, t2)
+	if #t1 ~= #t2 then return false end
+	for i=1,#t1 do
+		if t1[i] ~= t2[i] then return false end
+	end
+	return true
+end
+
+-- Returns a string representation of the argument, with 'real' strings enclosed in single quotes
+local function stringRepresentation(v)
+	return type(v) == 'string' and ("'"..v.."'") or tostring(v)
+end
+
+
+local filename = "/tmp/somefile12345.txt"
+
+
+function M:_setup()
+	os.execute("rm -f " .. filename) -- make sure the file does not exist
+end
+
+function M:_teardown()
+	os.execute("rm -f " .. filename) -- make sure the file gets removed again
+end
+
+
+function M:test_splitString()
+	local input1, input2, input3 = ':a:b::', '/a/b//', '$a$b$$'
+	local expected = { '', 'a', 'b', '', '' }
+	
+	local result1 = input1:split()
+	local result2 = input2:split('/')
+	local result3 = input3:split('$')
+	
+	assert(#result1 == 5)
+	assert(compareTables(result1, expected))
+	assert(#result2 == 5)
+	assert(compareTables(result2, expected))
+	assert(#result3 == 5)
+	assert(compareTables(result3, expected))
+end
+
+function M:test_toboolean()
+	local trues = { true, 1, 'true', 'True', 'T', '1' }
+	local falses = { nil, false, 0, 'false', 'False' , 'f', {} }
+	
+	for _,v in pairs(trues) do assert(utils.toboolean(v), "expected true: " .. stringRepresentation(v)) end
+	for _,v in pairs(falses) do assert(not utils.toboolean(v), "expected false: " .. stringRepresentation(v)) end
+end
+
+function M:test_dump()
+	--test handling of reference loops
+	assert(false, 'not implemented')
+end
+
+function M:test_getUciSectionName()
+	assert(false, 'not implemented')
+end
+
+function M:test_exists()
+	assert(utils.exists() == nil)
+	assert(utils.exists(nil) == nil)
+	
+	assert(not utils.exists(filename))
+	os.execute("touch " .. filename)
+	assert(utils.exists(filename))
+end
+
+function M:test_create()
+	local f, testContents = nil, 'test text'
+	
+	assert(utils.create() == nil)
+	assert(utils.create(nil) == nil)
+	
+	assert(not io.open(filename, 'r'))
+	utils.create(filename)
+	assert(io.open(filename, 'r'))
+	
+	f = io.open(filename, 'w')
+	f:write(testContents)
+	f:close()
+	
+	utils.create(filename)
+	f = io.open(filename, 'r')
+	local actualContents = f:read('*all')
+	assert(actualContents == testContents)
+end
+
+function M:test_symlink()
+	assert(false, 'not implemented')
+end
+
+function M:test_symlinkInRoot()
+	assert(false, 'not implemented')
+end
+
+return M

src/test/testrunner.lua

@@ -0,0 +1,87 @@
+package.path = package.path .. ';./test/?.lua'
+local ansicolors = require('test.ansicolors')
+
+local testFunctionPrefix = 'test_'
+
+local function tableIndexOf(t, val)
+	for k,v in ipairs(t) do 
+		if v == val then return k end
+	end
+	return -1
+end
+
+local function runningOnWifibox()
+	local f,e = io.open('/etc/openwrt_release', 'r')
+	return f ~= nil
+end
+
+local function runTestFile(filename, showStackTraces)
+	local r,tf = pcall(require, filename)
+	local stackTrace, errorMessage
+	
+	local function errorHandler(msg)
+		stackTrace = debug.traceback()
+		errorMessage = msg
+	end
+	
+	if not r then return nil,tf end
+	if not tf._is_test then return nil,"not a test file" end
+	
+	local setupFunc, teardownFunc = tf._setup, tf._teardown
+	
+	print("======= running test file '" .. filename .. "' =======")
+	
+	for k,v in pairs(tf) do
+		--if type(v) == 'function' and k ~= '_setup' and k ~= '_teardown' then
+		if type(v) == 'function' and k:find(testFunctionPrefix) == 1 then
+			local baseName = k:sub(testFunctionPrefix:len() + 1)
+			local skip = (tableIndexOf(tf._skip, baseName) > -1)
+			local wifiboxOnly = (tableIndexOf(tf._wifibox_only, baseName) > -1)
+			
+			if not skip and (not wifiboxOnly or runningOnWifibox()) then
+				pcall(setupFunc)
+				local testResult = xpcall(v, errorHandler)
+				pcall(teardownFunc)
+				
+				if testResult then
+					print(ansicolors.green .. "[OK ] " .. ansicolors.reset .. k)
+				else
+					print(ansicolors.red .. "[ERR] " .. ansicolors.reset .. k)
+					if errorMessage then print("      " .. errorMessage) end
+					if showStackTraces and stackTrace then print("      " .. stackTrace) end
+				end
+			else
+				if skip then
+					print(ansicolors.bright .. ansicolors.black .. "[SKP] " .. ansicolors.reset .. k)
+				else
+					print(ansicolors.yellow .. "[WBO] " .. ansicolors.reset .. k)
+				end
+			end
+		end
+	end
+	
+	print("")
+	
+	return true
+end
+
+
+local function main()
+	if #arg < 1 then
+		print("Please specify at least one lua test file")
+		os.exit(1)
+	end
+	
+	for i=1,#arg do
+		local modName = 'test_'..arg[i]
+		local r,e = runTestFile(modName, true)
+		
+		if not r then
+			io.stderr:write("test file '" .. modName .. "' could not be loaded or is not a test file ('" .. e .. "')\n")
+		end
+	end
+	
+	os.exit(0)
+end
+
+main(arg)

src/test/www/restapi.css

@@ -0,0 +1,43 @@
+body {
+	width: 100%;
+}
+
+div#content {
+	width: 80%;
+	margin: auto;
+}
+
+div.module {
+	border: 1px solid #eee;
+	margin-bottom: 1em;
+}
+
+.title {
+	padding-left: 2em;
+	font-size: larger;
+	display: block;
+}
+
+.resp_success {
+	color: green;
+}
+
+.resp_status {
+	margin-right: 1em;
+}
+
+.resp_fail {
+	color: yellow;
+}
+
+.resp_error {
+	color: red;
+}
+
+.resp_unknown {
+	color: purple;
+}
+
+span.resp_msg {
+	padding-left: 1em;
+}

src/test/www/restapi.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+	<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
+	<title>Test page for the Doodle3D WiFiBox REST API</title>
+	<link type="text/css" rel="stylesheet" href="restapi.css" />
+	<script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
+	<script type="text/javascript" src="restapi.js"></script>
+</head>
+<body><div id="content">
+	<div id="module_test" class="module">
+		<span class="title">Test API</span>
+	</div>
+	<div id="module_network" class="module">
+		<span class="title">Network API</span>
+	</div>
+	
+	<div>
+		<span class="title">Run arbitrary requests</span>
+	</div>
+</div></body>
+</html>

src/test/www/restapi.js

@@ -0,0 +1,40 @@
+const API_ROOT = "/cgi-bin/d3dapi";
+
+$(document).ready(function(){
+	performRequest('test', '123', "GET", {});
+	performRequest('test', '', "POST", {});
+	performRequest('test', 'success', "GET", {});
+	performRequest('test', 'fail', "GET", {});
+	performRequest('test', 'error', "GET", {});
+	performRequest('test', 'echo', "GET", {});
+	performRequest('test', 'write', "POST", {});
+	performRequest('test', 'read', "GET", {});
+});
+
+/*
+ * TODO
+ * - change function signature to: apiPath, data, expected
+ * - create request divs before ajax request so it's visible what 'threads' have been put out
+ * - function always tries both GET and POST and matches this with expected.methods
+ * - expected.methods can be 'GET', 'POST' or 'BOTH'
+ * - expected.status indicates what status was expected
+ * - expected.data.{...} indicates what fields should look like (regex/literal/...?)
+ * - anything not specified in expected.data is ignored
+ */
+function performRequest(mod, func, method, data) {
+	$.ajax({
+		type: method,
+		context: $("#module_" + mod),
+		url: API_ROOT + "/" + mod + "/" + func,
+		dataType: 'json',
+		data: data
+	}).done(function(response){
+		var status = response.status == 'success' ? '<span class="resp_status resp_success">+</span>'
+				: response.status == 'fail' ? '<span class="resp_status resp_fail">-</span>'
+						: response.status == 'error' ? '<span class="resp_status resp_error">!</span>'
+								: '<span class="resp_status resp_unknown">?</span>';
+		var modFunc = '<span class="resp_mod_func">' + mod + '/' + func + '</span><br/>';
+		this.append('<div id="resp_' + mod + '_' + func + '">' + status + modFunc
+				+ '<span class="resp_msg">' + response.msg + '</span></div>');
+	});
+}

src/util/logger.lua

@@ -1,8 +1,10 @@
+local utils = require('util.utils')
+
 local M = {}
 
 local logLevel, logVerbose, logStream
 
-M.LEVEL = {"debug", "info", "warn", "error", "fatal"}
+M.LEVEL = {'debug', 'info', 'warn', 'error', 'fatal'}
 
 -- M.LEVEL already has idx=>name entries, now create name=>idx entries
 for i,v in ipairs(M.LEVEL) do
@@ -22,31 +24,18 @@ end
 
 local function log(level, msg, verbose)
 	if level >= logLevel then
-		local now = os.date("%m-%d %H:%M:%S")
+		local now = os.date('%m-%d %H:%M:%S')
 		local i = debug.getinfo(3) --the stack frame just above the logger call
 		local v = verbose
 		if v == nil then v = logVerbose end
 		local name = i.name or "(nil)"
-		local vVal = "nil"
-		local m = (type(msg) == "string") and msg or M:dump(msg)
+		local vVal = 'nil'
+		local m = (type(msg) == 'string') and msg or utils.dump(msg)
 		if v then logStream:write(now .. " (" .. M.LEVEL[level] .. ")     " .. m .. "  [" .. name .. "@" .. i.short_src .. ":" .. i.linedefined .. "]\n")
 		else logStream:write(now .. " (" .. M.LEVEL[level] .. ")     " .. m .. "\n") end
 	end
 end
 
-function M:dump(o)
-	if type(o) == 'table' then
-		local s = '{ '
-		for k,v in pairs(o) do
-			if type(k) ~= 'number' then k = '"'..k..'"' end
-			s = s .. '['..k..'] = ' .. M:dump(v) .. ','
-		end
-		return s .. '} '
-	else
-		return tostring(o)
-	end
-end
-
 function M:debug(msg, verbose) log(M.LEVEL.debug, msg, verbose); return true end
 function M:info(msg, verbose) log(M.LEVEL.info, msg, verbose); return true end
 function M:warn(msg, verbose) log(M.LEVEL.warn, msg, verbose); return true end

src/util/utils.lua

@@ -1,9 +1,9 @@
-local uci = require("uci").cursor()
+local uci = require('uci').cursor()
 
 local M = {}
 
 function string:split(div)
-	local div, pos, arr = div or ":", 0, {}
+	local div, pos, arr = div or ':', 0, {}
 	for st,sp in function() return self:find(div, pos, true) end do
 		table.insert(arr, self:sub(pos, st - 1))
 		pos = sp + 1
@@ -15,26 +15,63 @@ end
 function M.toboolean(s)
 	if not s then return false end
 	
-	local b = s:lower()
-	return (b == "1" or b == "t" or b == "true") and true or false
+	local b = type(s) == 'string' and s:lower() or s
+	local textTrue = (b == '1' or b == 't' or b == 'true')
+	local boolTrue = (type(b) == 'boolean' and b == true)
+	local numTrue = (type(b) == 'number' and b > 0)
+	return textTrue or boolTrue or numTrue
+end
+
+function M.dump(o)
+	if type(o) == 'table' then
+		local s = '{ '
+		for k,v in pairs(o) do
+			if type(k) ~= 'number' then k = '"'..k..'"' end
+			s = s .. '['..k..'] = ' .. M.dump(v) .. ','
+		end
+		return s .. '} '
+	else
+		return tostring(o)
+	end
 end
 
 function M.getUciSectionName(config, type)
 	local sname = nil
-	uci:foreach(config, type, function(s) sname = s[".name"] end)
+	uci:foreach(config, type, function(s) sname = s['.name'] end)
 	return sname
 end
 
 function M.exists(file)
-	local r = io.open(file) --ignore returned message
-	if r ~= nil then io.close(r) end
+	if not file or type(file) ~= 'string' or file:len() == 0 then
+		return nil, "file must be a non-empty string"
+	end
+	
+	local r = io.open(file, 'r') -- ignore returned message
+	if r then r:close() end
 	return r ~= nil
 end
 
+--creates and returns true if not exists, returns false it does, nil+msg on error
+function M.create(file)
+	local r,m = M.exists(file)
+	
+	if r == nil then
+		return r,m
+	elseif r == true then
+		return true
+	end
+	
+	r,m = io.open(file, 'a') -- append mode is probably safer in case the file does exist after all
+	if not r then return r,m end
+	
+	r:close()
+	return true
+end
+
 --FIXME: somehow protect this function from running arbitrary commands
 function M.symlink(from, to)
-	if from == nil or from == "" or to == nil or to == "" then return -1 end
-	local x = "ln -s " .. from .. " " .. to
+	if from == nil or from == '' or to == nil or to == '' then return -1 end
+	local x = 'ln -s ' .. from .. ' ' .. to
 	return os.execute(x)
 end