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local json = require "cjson" -- Various common routines used by the Lua CJSON package -- -- Mark Pulford <mark@kyne.com.au> -- Determine with a Lua table can be treated as an array. -- Explicitly returns "not an array" for very sparse arrays. -- Returns: -- -1 Not an array -- 0 Empty table -- >0 Highest index in the array local function is_array(table) local max = 0 local count = 0 for k, v in pairs(table) do if type(k) == "number" then if k > max then max = k end count = count + 1 else return -1 end end if max > count * 2 then return -1 end return max end local serialise_value local function serialise_table(value, indent, depth) local spacing, spacing2, indent2 if indent then spacing = "\n" .. indent spacing2 = spacing .. " " indent2 = indent .. " " else spacing, spacing2, indent2 = " ", " ", false end depth = depth + 1 if depth > 50 then return "Cannot serialise any further: too many nested tables" end local max = is_array(value) local comma = false local fragment = { "{" .. spacing2 } if max > 0 then -- Serialise array for i = 1, max do if comma then table.insert(fragment, "," .. spacing2) end table.insert(fragment, serialise_value(value[i], indent2, depth)) comma = true end elseif max < 0 then -- Serialise table for k, v in pairs(value) do if comma then table.insert(fragment, "," .. spacing2) end table.insert(fragment, ("[%s] = %s"):format(serialise_value(k, indent2, depth), serialise_value(v, indent2, depth))) comma = true end end table.insert(fragment, spacing .. "}") return table.concat(fragment) end function serialise_value(value, indent, depth) if indent == nil then indent = "" end if depth == nil then depth = 0 end if value == json.null then return "json.null" elseif type(value) == "string" then return ("%q"):format(value) elseif type(value) == "nil" or type(value) == "number" or type(value) == "boolean" then return tostring(value) elseif type(value) == "table" then return serialise_table(value, indent, depth) else return "\"<" .. type(value) .. ">\"" end end local function file_load(filename) local file if filename == nil then file = io.stdin else local err file, err = io.open(filename, "rb") if file == nil then error(("Unable to read '%s': %s"):format(filename, err)) end end local data = file:read("*a") if filename ~= nil then file:close() end if data == nil then error("Failed to read " .. filename) end return data end local function file_save(filename, data) local file if filename == nil then file = io.stdout else local err file, err = io.open(filename, "wb") if file == nil then error(("Unable to write '%s': %s"):format(filename, err)) end end file:write(data) if filename ~= nil then file:close() end end local function compare_values(val1, val2) local type1 = type(val1) local type2 = type(val2) if type1 ~= type2 then return false end -- Check for NaN if type1 == "number" and val1 ~= val1 and val2 ~= val2 then return true end if type1 ~= "table" then -- Lua 5.2 reports function names more precisely if _VERSION == "Lua 5.2" and type1 == "string" then if val1 == val2 then return true else local start, stop = string.find(val2, "to '%?'") if start == nil then return false else local prefix2 = string.sub(val2,1,start+3) local postfix2 = string.sub(val2,stop) local prefix1 = string.sub(val1,1,start+3) local postfix1 = string.sub(val1,-string.len(postfix2)) return prefix1 == prefix2 and postfix1 == postfix2 end end else return val1 == val2 end end -- check_keys stores all the keys that must be checked in val2 local check_keys = {} for k, _ in pairs(val1) do check_keys[k] = true end for k, v in pairs(val2) do if not check_keys[k] then return false end if not compare_values(val1[k], val2[k]) then return false end check_keys[k] = nil end for k, _ in pairs(check_keys) do -- Not the same if any keys from val1 were not found in val2 return false end return true end local test_count_pass = 0 local test_count_total = 0 local function run_test_summary() return test_count_pass, test_count_total end local function run_test(testname, func, input, should_work, output) local function status_line(name, status, value) local statusmap = { [true] = ":success", [false] = ":error" } if status ~= nil then name = name .. statusmap[status] end print(("[%s] %s"):format(name, serialise_value(value, false))) end local result = { pcall(func, unpack(input)) } local success = table.remove(result, 1) local correct = false if success == should_work and compare_values(result, output) then correct = true test_count_pass = test_count_pass + 1 end test_count_total = test_count_total + 1 local teststatus = { [true] = "PASS", [false] = "FAIL" } print(("==> Test [%d] %s: %s"):format(test_count_total, testname, teststatus[correct])) status_line("Input", nil, input) if not correct then status_line("Expected", should_work, output) end status_line("Received", success, result) print() return correct, result end local function run_test_group(tests) local function run_helper(name, func, input) if type(name) == "string" and #name > 0 then print("==> " .. name) end -- Not a protected call, these functions should never generate errors. func(unpack(input or {})) print() end for _, v in ipairs(tests) do -- Run the helper if "should_work" is missing if v[4] == nil then run_helper(unpack(v)) else run_test(unpack(v)) end end end -- Run a Lua script in a separate environment local function run_script(script, env) local env = env or {} local func -- Use setfenv() if it exists, otherwise assume Lua 5.2 load() exists if _G.setfenv then func = loadstring(script) if func then setfenv(func, env) end else func = load(script, nil, nil, env) end if func == nil then error("Invalid syntax.") end func() return env end -- Export functions return { serialise_value = serialise_value, file_load = file_load, file_save = file_save, compare_values = compare_values, run_test_summary = run_test_summary, run_test = run_test, run_test_group = run_test_group, run_script = run_script } -- vi:ai et sw=4 ts=4:
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