Module:ScribuntoUnit
Documentation for this module may be created at Module:ScribuntoUnit/doc
-------------------------------------------------------------------------------
-- Unit tests for Scribunto.
-------------------------------------------------------------------------------
require('strict')
local DebugHelper = {}
local ScribuntoUnit = {}
-- The cfg table contains all localisable strings and configuration, to make it
-- easier to port this module to another wiki.
local cfg = mw.loadData('Module:ScribuntoUnit/config')
-------------------------------------------------------------------------------
-- Concatenates keys and values, ideal for displaying a template argument table.
-- @param keySeparator glue between key and value (defaults to " = ")
-- @param separator glue between different key-value pairs (defaults to ", ")
-- @example concatWithKeys({a = 1, b = 2, c = 3}, ' => ', ', ') => "a => 1, b => 2, c => 3"
--
function DebugHelper.concatWithKeys(table, keySeparator, separator)
keySeparator = keySeparator or ' = '
separator = separator or ', '
local concatted = ''
local i = 1
local first = true
local unnamedArguments = true
for k, v in pairs(table) do
if first then
first = false
else
concatted = concatted .. separator
end
if k == i and unnamedArguments then
i = i + 1
concatted = concatted .. tostring(v)
else
unnamedArguments = false
concatted = concatted .. tostring(k) .. keySeparator .. tostring(v)
end
end
return concatted
end
-------------------------------------------------------------------------------
-- Compares two tables recursively (non-table values are handled correctly as well).
-- @param ignoreMetatable if false, t1.__eq is used for the comparison
--
function DebugHelper.deepCompare(t1, t2, ignoreMetatable)
local type1 = type(t1)
local type2 = type(t2)
if type1 ~= type2 then
return false
end
if type1 ~= 'table' then
return t1 == t2
end
local metatable = getmetatable(t1)
if not ignoreMetatable and metatable and metatable.__eq then
return t1 == t2
end
for k1, v1 in pairs(t1) do
local v2 = t2[k1]
if v2 == nil or not DebugHelper.deepCompare(v1, v2) then
return false
end
end
for k2, v2 in pairs(t2) do
if t1[k2] == nil then
return false
end
end
return true
end
-------------------------------------------------------------------------------
-- Raises an error with stack information
-- @param details a table with error details
-- - should have a 'text' key which is the error message to display
-- - a 'trace' key will be added with the stack data
-- - and a 'source' key with file/line number
-- - a metatable will be added for error handling
--
function DebugHelper.raise(details, level)
level = (level or 1) + 1
details.trace = debug.traceback('', level)
details.source = string.match(details.trace, '^%s*stack traceback:%s*(%S*: )')
-- setmetatable(details, {
-- __tostring: function() return details.text end
-- })
error(details, level)
end
-------------------------------------------------------------------------------
-- when used in a test, that test gets ignored, and the skipped count increases by one.
--
function ScribuntoUnit:markTestSkipped()
DebugHelper.raise({ScribuntoUnit = true, skipped = true}, 3)
end
-------------------------------------------------------------------------------
-- Checks that the input is true
-- @param message optional description of the test
--
function ScribuntoUnit:assertTrue(actual, message)
if not actual then
DebugHelper.raise({ScribuntoUnit = true, text = string.format("Failed to assert that %s is true", tostring(actual)), message = message}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks that the input is false
-- @param message optional description of the test
--
function ScribuntoUnit:assertFalse(actual, message)
if actual then
DebugHelper.raise({ScribuntoUnit = true, text = string.format("Failed to assert that %s is false", tostring(actual)), message = message}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks an input string contains the expected string
-- @param message optional description of the test
-- @param plain search is made with a plain string instead of a ustring pattern
--
function ScribuntoUnit:assertStringContains(pattern, s, plain, message)
if type(pattern) ~= 'string' then
DebugHelper.raise({
ScribuntoUnit = true,
text = mw.ustring.format("Pattern type error (expected string, got %s)", type(pattern)),
message = message
}, 2)
end
if type(s) ~= 'string' then
DebugHelper.raise({
ScribuntoUnit = true,
text = mw.ustring.format("String type error (expected string, got %s)", type(s)),
message = message
}, 2)
end
if not mw.ustring.find(s, pattern, nil, plain) then
DebugHelper.raise({
ScribuntoUnit = true,
text = mw.ustring.format('Failed to find %s "%s" in string "%s"', plain and "plain string" or "pattern", pattern, s),
message = message
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks an input string doesn't contain the expected string
-- @param message optional description of the test
-- @param plain search is made with a plain string instead of a ustring pattern
--
function ScribuntoUnit:assertNotStringContains(pattern, s, plain, message)
if type(pattern) ~= 'string' then
DebugHelper.raise({
ScribuntoUnit = true,
text = mw.ustring.format("Pattern type error (expected string, got %s)", type(pattern)),
message = message
}, 2)
end
if type(s) ~= 'string' then
DebugHelper.raise({
ScribuntoUnit = true,
text = mw.ustring.format("String type error (expected string, got %s)", type(s)),
message = message
}, 2)
end
local i, j = mw.ustring.find(s, pattern, nil, plain)
if i then
local match = mw.ustring.sub(s, i, j)
DebugHelper.raise({
ScribuntoUnit = true,
text = mw.ustring.format('Found match "%s" for %s "%s"', match, plain and "plain string" or "pattern", pattern),
message = message
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks that an input has the expected value.
-- @param message optional description of the test
-- @example assertEquals(4, add(2,2), "2+2 should be 4")
--
function ScribuntoUnit:assertEquals(expected, actual, message)
if type(expected) == 'number' and type(actual) == 'number' then
self:assertWithinDelta(expected, actual, 1e-8, message)
elseif expected ~= actual then
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Failed to assert that %s equals expected %s", tostring(actual), tostring(expected)),
actual = actual,
expected = expected,
message = message,
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks that 'actual' is within 'delta' of 'expected'.
-- @param message optional description of the test
-- @example assertEquals(1/3, 9/3, "9/3 should be 1/3", 0.000001)
function ScribuntoUnit:assertWithinDelta(expected, actual, delta, message)
if type(expected) ~= "number" then
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Expected value %s is not a number", tostring(expected)),
actual = actual,
expected = expected,
message = message,
}, 2)
end
if type(actual) ~= "number" then
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Actual value %s is not a number", tostring(actual)),
actual = actual,
expected = expected,
message = message,
}, 2)
end
local diff = expected - actual
if diff < 0 then diff = - diff end -- instead of importing math.abs
if diff > delta then
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Failed to assert that %f is within %f of expected %f", actual, delta, expected),
actual = actual,
expected = expected,
message = message,
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks that a table has the expected value (including sub-tables).
-- @param message optional description of the test
-- @example assertDeepEquals({{1,3}, {2,4}}, partition(odd, {1,2,3,4}))
function ScribuntoUnit:assertDeepEquals(expected, actual, message)
if not DebugHelper.deepCompare(expected, actual) then
if type(expected) == 'table' then
expected = mw.dumpObject(expected)
end
if type(actual) == 'table' then
actual = mw.dumpObject(actual)
end
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Failed to assert that %s equals expected %s", tostring(actual), tostring(expected)),
actual = actual,
expected = expected,
message = message,
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks that a wikitext gives the expected result after processing.
-- @param message optional description of the test
-- @example assertResultEquals("Hello world", "{{concat|Hello|world}}")
function ScribuntoUnit:assertResultEquals(expected, text, message)
local frame = self.frame
local actual = frame:preprocess(text)
if expected ~= actual then
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Failed to assert that %s equals expected %s after preprocessing", text, tostring(expected)),
actual = actual,
actualRaw = text,
expected = expected,
message = message,
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks that two wikitexts give the same result after processing.
-- @param message optional description of the test
-- @example assertSameResult("{{concat|Hello|world}}", "{{deleteLastChar|Hello world!}}")
function ScribuntoUnit:assertSameResult(text1, text2, message)
local frame = self.frame
local processed1 = frame:preprocess(text1)
local processed2 = frame:preprocess(text2)
if processed1 ~= processed2 then
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Failed to assert that %s equals expected %s after preprocessing", processed1, processed2),
actual = processed1,
actualRaw = text1,
expected = processed2,
expectedRaw = text2,
message = message,
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks that a template gives the expected output.
-- @param message optional description of the test
-- @example assertTemplateEquals("Hello world", "concat", {"Hello", "world"})
function ScribuntoUnit:assertTemplateEquals(expected, template, args, message)
local frame = self.frame
local actual = frame:expandTemplate{ title = template, args = args}
if expected ~= actual then
DebugHelper.raise({
ScribuntoUnit = true,
text = string.format("Failed to assert that %s with args %s equals expected %s after preprocessing",
DebugHelper.concatWithKeys(args), template, expected),
actual = actual,
actualRaw = template,
expected = expected,
message = message,
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks whether a function throws an error
-- @param fn the function to test
-- @param expectedMessage optional the expected error message
-- @param message optional description of the test
function ScribuntoUnit:assertThrows(fn, expectedMessage, message)
local succeeded, actualMessage = pcall(fn)
if succeeded then
DebugHelper.raise({
ScribuntoUnit = true,
text = 'Expected exception but none was thrown',
message = message,
}, 2)
end
-- For strings, strip the line number added to the error message
actualMessage = type(actualMessage) == 'string'
and string.match(actualMessage, 'Module:[^:]*:[0-9]*: (.*)')
or actualMessage
local messagesMatch = DebugHelper.deepCompare(expectedMessage, actualMessage)
if expectedMessage and not messagesMatch then
DebugHelper.raise({
ScribuntoUnit = true,
expected = expectedMessage,
actual = actualMessage,
text = string.format('Expected exception with message %s, but got message %s',
tostring(expectedMessage), tostring(actualMessage)
),
message = message
}, 2)
end
end
-------------------------------------------------------------------------------
-- Checks whether a function doesn't throw an error
-- @param fn the function to test
-- @param message optional description of the test
function ScribuntoUnit:assertDoesNotThrow(fn, message)
local succeeded, actualMessage = pcall(fn)
if succeeded then
return
end
-- For strings, strip the line number added to the error message
actualMessage = type(actualMessage) == 'string'
and string.match(actualMessage, 'Module:[^:]*:[0-9]*: (.*)')
or actualMessage
DebugHelper.raise({
ScribuntoUnit = true,
actual = actualMessage,
text = string.format('Expected no exception, but got exception with message %s',
tostring(actualMessage)
),
message = message
}, 2)
end
-------------------------------------------------------------------------------
-- Creates a new test suite.
-- @param o a table with test functions (alternatively, the functions can be added later to the returned suite)
--
function ScribuntoUnit:new(o)
o = o or {}
setmetatable(o, {__index = self})
o.run = function(frame) return self:run(o, frame) end
return o
end
-------------------------------------------------------------------------------
-- Resets global counters
--
function ScribuntoUnit:init(frame)
self.frame = frame or mw.getCurrentFrame()
self.successCount = 0
self.failureCount = 0
self.skipCount = 0
self.results = {}
end
-------------------------------------------------------------------------------
-- Runs a single testcase
-- @param name test nume
-- @param test function containing assertions
--
function ScribuntoUnit:runTest(suite, name, test)
local success, details = pcall(test, suite)
if success then
self.successCount = self.successCount + 1
table.insert(self.results, {name = name, success = true})
elseif type(details) ~= 'table' or not details.ScribuntoUnit then -- a real error, not a failed assertion
self.failureCount = self.failureCount + 1
table.insert(self.results, {name = name, error = true, message = 'Lua error -- ' .. tostring(details)})
elseif details.skipped then
self.skipCount = self.skipCount + 1
table.insert(self.results, {name = name, skipped = true})
else
self.failureCount = self.failureCount + 1
local message = details.source
if details.message then
message = message .. details.message .. "\n"
end
message = message .. details.text
table.insert(self.results, {name = name, error = true, message = message, expected = details.expected, actual = details.actual, testname = details.message})
end
end
-------------------------------------------------------------------------------
-- Runs all tests and displays the results.
--
function ScribuntoUnit:runSuite(suite, frame)
self:init(frame)
local names = {}
for name in pairs(suite) do
if name:find('^test') then
table.insert(names, name)
end
end
table.sort(names) -- Put tests in alphabetical order.
for i, name in ipairs(names) do
local func = suite[name]
self:runTest(suite, name, func)
end
return {
successCount = self.successCount,
failureCount = self.failureCount,
skipCount = self.skipCount,
results = self.results,
}
end
-------------------------------------------------------------------------------
-- #invoke entry point for running the tests.
-- Can be called without a frame, in which case it will use mw.log for output
-- @param displayMode see displayResults()
--
function ScribuntoUnit:run(suite, frame)
local testData = self:runSuite(suite, frame)
if frame and frame.args then
return self:displayResults(testData, frame.args.displayMode or 'table')
else
return self:displayResults(testData, 'log')
end
end
-------------------------------------------------------------------------------
-- Displays test results
-- @param displayMode: 'table', 'log' or 'short'
--
function ScribuntoUnit:displayResults(testData, displayMode)
if displayMode == 'table' then
return self:displayResultsAsTable(testData)
elseif displayMode == 'log' then
return self:displayResultsAsLog(testData)
elseif displayMode == 'short' then
return self:displayResultsAsShort(testData)
else
error('unknown display mode')
end
end
function ScribuntoUnit:displayResultsAsLog(testData)
if testData.failureCount > 0 then
mw.log('FAILURES!!!')
elseif testData.skipCount > 0 then
mw.log('Some tests could not be executed without a frame and have been skipped. Invoke this test suite as a template to run all tests.')
end
mw.log(string.format('Assertions: success: %d, error: %d, skipped: %d', testData.successCount, testData.failureCount, testData.skipCount))
mw.log('-------------------------------------------------------------------------------')
for _, result in ipairs(testData.results) do
if result.error then
mw.log(string.format('%s: %s', result.name, result.message))
end
end
end
function ScribuntoUnit:displayResultsAsShort(testData)
local text = string.format(cfg.shortResultsFormat, testData.successCount, testData.failureCount, testData.skipCount)
if testData.failureCount > 0 then
text = '<span class="error">' .. text .. '</span>'
end
return text
end
function ScribuntoUnit:displayResultsAsTable(testData)
local successIcon, failIcon = self.frame:preprocess(cfg.successIndicator), self.frame:preprocess(cfg.failureIndicator)
local text = ''
if testData.failureCount > 0 then
local msg = mw.message.newRawMessage(cfg.failureSummary, testData.failureCount):plain()
msg = self.frame:preprocess(msg)
if cfg.failureCategory then
msg = cfg.failureCategory .. msg
end
text = text .. failIcon .. ' ' .. msg .. '\n'
else
text = text .. successIcon .. ' ' .. cfg.successSummary .. '\n'
end
text = text .. '\n' .. mw.getCurrentFrame():extensionTag{
name = 'templatestyles',
args = { src = 'Module:ScribuntoUnit/styles.css' },
} .. '\n'
text = text .. '{| class="wikitable scribunto-test-table"\n'
text = text .. '!\n! ' .. cfg.nameString .. '\n! ' .. cfg.expectedString .. '\n! ' .. cfg.actualString .. '\n'
for _, result in ipairs(testData.results) do
text = text .. '|- class="test-result '
if result.error then
text = text .. 'test-result-error"\n| class="test-status-icon" | ' .. failIcon .. '\n| class="test-name" |'
if (result.expected and result.actual) then
local name = result.name
if result.testname then
name = name .. ' / ' .. result.testname
end
text = text .. name .. '\n| class="test-output test-output-expected" | ' .. mw.text.nowiki(tostring(result.expected)) .. '\n| class="test-output test-output-actual" | ' .. mw.text.nowiki(tostring(result.actual)) .. '\n'
else
text = text .. result.name .. '\n| class="test-output test-output-error"' .. ' colspan="2" | ' .. mw.text.nowiki(result.message) .. '\n'
end
else
text = text .. 'test-result-success"\n| class="test-status-icon" | ' .. successIcon .. '\n| class="test-name" | ' .. result.name .. '\n|\n|\n'
end
end
text = text .. '|}\n'
return text
end
return ScribuntoUnit