luau/tests/conformance/assert.lua

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-- This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
print("testing asserts") -- someone has to
if pcall(assert, false) or pcall(function() assert(false) end) then
error('catastrophic assertion failure') -- surely error() can't be broken
end
function ecall(fn, ...)
local ok, err = pcall(fn, ...)
assert(not ok)
return err:sub(err:find(": ") + 2, #err)
end
-- zero-ret calls work
assert(1)
assert(true)
-- returns first arg
assert(assert(1) == 1)
assert(type(assert({})) == 'table')
-- fails correctly
assert(ecall(function() assert() end) == "missing argument #1")
assert(ecall(function() assert(nil) end) == "assertion failed!")
assert(ecall(function() assert(false) end) == "assertion failed!")
-- fails with a message
assert(ecall(function() assert(nil, "epic fail") end) == "epic fail")
-- returns all arguments for multi-arg calls
assert(select('#', assert(1, 2, 3)) == 3)
assert(table.concat(table.pack(assert(1, 2, 3)), "") == "123")
return('OK')