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assertions.lua
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195 lines (177 loc) · 6.65 KB
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local opts = ... or {}
local assertions = {}
function assertions.assert_eq(left, right, message)
if left ~= right then
if message ~= nil then
message = string.format("assertion `left == right` failed: %s", tostring(message))
else
message = "assertion `left == right` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n left: %s\n right: %s", message, tostring(left), tostring(right)), frame_level)
end
end
function assertions.assert_ne(left, right, message)
if left == right then
if message ~= nil then
message = string.format("assertion `left ~= right` failed: %s", tostring(message))
else
message = "assertion `left ~= right` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n left: %s\n right: %s", message, tostring(left), tostring(right)), frame_level)
end
end
function assertions.assert_lt(left, right, message)
if not (left < right) then
if message ~= nil then
message = string.format("assertion `left < right` failed: %s", tostring(message))
else
message = "assertion `left < right` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n left: %s\n right: %s", message, tostring(left), tostring(right)), frame_level)
end
end
function assertions.assert_gt(left, right, message)
if not (left > right) then
if message ~= nil then
message = string.format("assertion `left > right` failed: %s", tostring(message))
else
message = "assertion `left > right` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n left: %s\n right: %s", message, tostring(left), tostring(right)), frame_level)
end
end
function assertions.assert_le(left, right, message)
if not (left <= right) then
if message ~= nil then
message = string.format("assertion `left <= right` failed: %s", tostring(message))
else
message = "assertion `left <= right` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n left: %s\n right: %s", message, tostring(left), tostring(right)), frame_level)
end
end
function assertions.assert_ge(left, right, message)
if not (left >= right) then
if message ~= nil then
message = string.format("assertion `left >= right` failed: %s", tostring(message))
else
message = "assertion `left >= right` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n left: %s\n right: %s", message, tostring(left), tostring(right)), frame_level)
end
end
function assertions.assert_match(obj, pattern, message)
if not tostring(obj):match(pattern) then
if message ~= nil then
message = string.format("assertion `obj:match(pattern)` failed: %s", tostring(message))
else
message = "assertion `obj:match(pattern)` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n pattern: %s\n obj: %s", message, pattern, tostring(obj)), frame_level)
end
end
local function next_level(level, k)
if type(k) == "string" then
return level .. '["' .. k .. '"]'
else
return level .. "[" .. tostring(k) .. "]"
end
end
local function deepcmp(left, right, level, visited, report_cb)
if type(left) ~= type(right) then
report_cb(left, right, level)
return false
end
if rawequal(left, right) then
return true
end
if type(left) ~= "table" then
report_cb(left, right, level)
return false
end
-- Prevent recursion
if visited[left] or visited[right] then
report_cb(left, right, level)
return false
end
-- Iterate over all keys in left and right, and compare their values recursively.
visited[left] = true
for k, v in next, left do
if not deepcmp(v, rawget(right, k), next_level(level, k), visited, report_cb) then
return false
end
end
visited[left] = nil
visited[right] = true
for k, v in next, right do
if not deepcmp(rawget(left, k), v, next_level(level, k), visited, report_cb) then
return false
end
end
visited[right] = nil
return true
end
function assertions.assert_same(left, right, message)
local left_v, right_v, level
local function report_cb(lv, rv, l)
left_v, right_v, level = lv, rv, l
end
if not deepcmp(left, right, "", {}, report_cb) then
if message ~= nil then
message = string.format("assertion `left ~ right` failed: %s", tostring(message))
else
message = "assertion `left ~ right` failed!"
end
local error_msg =
string.format("%s\n left%s: %s\n right%s: %s", message, level, tostring(left_v), level, tostring(right_v))
local frame_level = opts.level or 2
error(error_msg, frame_level)
end
end
function assertions.assert_starts_with(str, prefix, message)
str = tostring(str)
prefix = tostring(prefix)
if str:sub(1, #prefix) ~= prefix then
if message ~= nil then
message = string.format("assertion `str:starts_with(prefix)` failed: %s", tostring(message))
else
message = "assertion `str:starts_with(prefix)` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n prefix: %s\n str: %s", message, prefix, str), frame_level)
end
end
function assertions.assert_ends_with(str, suffix, message)
str = tostring(str)
suffix = tostring(suffix)
if suffix ~= "" and str:sub(-#suffix) ~= suffix then
if message ~= nil then
message = string.format("assertion `str:ends_with(suffix)` failed: %s", tostring(message))
else
message = "assertion `str:ends_with(suffix)` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n suffix: %s\n str: %s", message, suffix, str), frame_level)
end
end
function assertions.assert_contains(str, substr, message)
str = tostring(str)
substr = tostring(substr)
if not str:find(substr, 1, true) then
if message ~= nil then
message = string.format("assertion `str:contains(substr)` failed: %s", tostring(message))
else
message = "assertion `str:contains(substr)` failed!"
end
local frame_level = opts.level or 2
error(string.format("%s\n substr: %s\n str: %s", message, substr, str), frame_level)
end
end
return assertions