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|
require "cjson"
-- Misc routines to assist with CJSON testing
--
-- 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
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
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, string.format(
"[%s] = %s", 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 == cjson.null then
return "cjson.null"
elseif type(value) == "string" then
return string.format("%q", 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
function dump_value(value)
print(serialise_value(value))
end
function file_load(filename)
local file
if filename == nil then
file = io.stdin
else
local err
file, err = io.open(filename)
if file == nil then
error(string.format("Unable to read '%s': %s", 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
function file_save(filename, data)
local file
if filename == nil then
file = io.stdout
else
local err
file, err = io.open(filename, "w")
if file == nil then
error(string.format("Unable to write '%s': %s", filename, err))
end
end
file:write(data)
if filename ~= nil then
file:close()
end
end
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
return val1 == val2
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
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(string.format("[%s] %s", 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
end
local teststatus = { [true] = "PASS", [false] = "FAIL" }
print("==> Test " .. 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
function run_test_group(testgroup, tests)
local function run_config(configname, func)
local success, msg = pcall(func)
if msg then
print(string.format("==> Config %s: %s", configname, msg))
end
print()
end
local function test_id(group, id)
return string.format("%s [%d]", group, id)
end
for k, v in ipairs(tests) do
if type(v) == "function" then
-- Useful for changing configuration during a batch
run_config(test_id(testgroup, k), v)
elseif type(v) == "table" then
run_test(test_id(testgroup, k), unpack(v))
else
error("Testgroup can only contain functions and tables")
end
end
end
-- vi:ai et sw=4 ts=4:
|
