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--- Test module
-- @module test
local pp = require("pp")
local test = {}
local counter = {failed = 0, succeeded = 0}
local tested_funcs = {}
-- catch deaths
_exit = os.exit
os.exit = function(a)
error("os.exit was called\n" .. debug.traceback(nil, 2))
end
-- monkeypatch print
local realprint = print
local outputs = {}
local function printtostring(...)
local s = ""
for i = 1, select("#", ...) do
local ss = tostring(select(i, ...))
if i > 1 then
s = s .. "\t"
end
s = s .. ss
end
s = s
return s
end
local function storeoutput(append_newline, ...)
local s = printtostring(...)
if append_newline then
s = s .. "\n"
end
table.insert(outputs, s)
end
print = function (...)
storeoutput(true, ...)
--realprint(...)
end
io.write = function (...)
storeoutput(false, ...)
end
local function log(...)
local n = select("#", ...)
if n > 1 then
io.stderr:write(string.format("%-30s", select(1, ...)))
end
io.stderr:write(printtostring(select(n > 1 and 2 or 1, ...)).."\n")
end
local cmp, tablecmp
tablecmp = function (a, b)
if a == b then return true end
if #a ~= #b then
return false
end
for k,v in pairs(a) do
if not cmp(b[k], v) then
return false
end
end
for k,v in pairs(b) do
if not cmp(a[k], v) then
return false
end
end
return true
end
cmp = function (a, b)
if type(a) == "table" then
return tablecmp(a, b)
else
return a == b
end
end
function test.test(name, expected, fn, ...)
tested_funcs[fn] = true
local r, s = pcall(fn, ...)
if not r then
log(name, "FAIL: exception caught: ", s)
counter.failed = counter.failed + 1
else
-- if nil return value, use the last line of output.
-- false is a valid return value.
if s == nil then
s = outputs[#outputs]
end
if not cmp(s, expected) then
log(name, "FAIL: expected " .. pp.format(expected) .. " but got " .. pp.format(s))
counter.failed = counter.failed + 1
else
log(name, "success")
counter.succeeded = counter.succeeded + 1
end
end
-- reset outputs between tests
outputs = {}
return r
end
function test.summarise()
log("summary: " .. counter.succeeded .. "/" .. counter.succeeded + counter.failed .. " successes")
return counter.failed == 0
end
function test.coverage(t)
-- recursively count number of functions in table t and compare to number of functions tested so far
local function recur_count(t)
local count = 0
for _,v in pairs(t) do
if type(v) == "function" then
count = count + 1
elseif type(v) == "table" then
count = count + recur_count(v)
end
end
return count
end
local total = recur_count(t)
local tested = 0
for k,v in pairs(tested_funcs) do tested = tested + 1 end
log("test coverage: " .. tested .. "/" .. total .. " (" .. 100 * tested / total .. "%)")
end
return test
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