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assert-gooder/test/test_assert-gooder.lua

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local SUITE = require 'TestSuite' 'assert-gooder'
SUITE:setEnvironment {
assert = require 'assert-gooder'
}
--------------------------------------------------------------------------------
SUITE:addTest('local variable', function ()
local _, msg = pcall(function ()
local a = 2
assert(type(a) == 'string')
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (string expected, but got number 2)', msg)
end)
SUITE:addTest('upvalue variable', function ()
local a = 2
local _, msg = pcall(function ()
assert(type(a) == 'string')
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad upvalue \'a\' (string expected, but got number 2)', msg)
end)
SUITE:addTest('global variable', function ()
a = 2
local _, msg = pcall(function ()
assert(type(a) == 'string')
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad global \'a\' (string expected, but got number 2)', msg)
end)
SUITE:addTest('argument to anon function', function ()
local _, msg = pcall(function()
(function (a)
assert(type(a) == 'string')
end)(2)
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-3)..': '..'assertion failed! bad argument #1 \'a\' to the anonymous function at ./test/test_assert-gooder.lua:'..curline(-4)..' (string expected, but got number 2)', msg)
end)
SUITE:addTest('argument to named function', function ()
local f = function (a)
assert(type(a) == 'string')
end
local _, msg = pcall(function () f(2) end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-3)..': '..'assertion failed! bad argument #1 \'a\' to \'f\' (string expected, but got number 2)', msg)
end)
SUITE:addTest('indexing', function ()
local _, msg = pcall(function ()
local a = { b = 39 }
assert(type(a.b) == 'string')
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad key "b" in local \'a\' (string expected, but got number 39)', msg)
end)
SUITE:addTest('subscript constant', function ()
local _, msg = pcall(function ()
local a = { 4, 2, 3, 6 }
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assert(type(a[2]) == 'string')
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad key 2 in local \'a\' (string expected, but got number 2)', msg)
end)
SUITE:addTest('subscript variable', function ()
local _, msg = pcall(function ()
local a, i = { 4, 2, 3, 6 }, 2
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assert(type(a[i]) == 'string')
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad key 2 in local \'a\' (string expected, but got number 2)', msg)
end)
--------------------------------------------------------------------------------
SUITE:addTest('can improve asserts in loaded strings too', function ()
local func = loadstring "return function(a) assert(type(a) == 'string') end" ()
local _, msg = pcall(setfenv(func, getfenv()), 42)
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assert_equal('[string "return function(a) assert(type(a) == \'string\'..."]:1: '..'assertion failed! bad argument #1 \'a\' to the anonymous function from loaded string (string expected, but got number 42)', msg)
end)
SUITE:addTest('really complicated expression', function ()
local f = function ()
assert(a == 3 and math.floor(2.522) == 2 or 5 == n)
end
local _, msg = pcall(f, 2)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-3)..': '..'assertion failed! expression `a == 3 and math.floor(2.522) == 2 or 5 == n` evaluated to false (a was nil, n was nil)', msg)
end)
SUITE:addTest('really complicated expression with modified global', function ()
tonumber = nil
local f = function ()
assert(a == 3 and math.floor(2.522) == 2 or 5 == n and tonumber)
end
local _, msg = pcall(f, 2)
assert_equal('./test/test_assert-gooder.lua:'..curline(-3)..': '..'assertion failed! expression `a == 3 and math.floor(2.522) == 2 or 5 == n and tonumber` evaluated to false (a was nil, n was nil, standard-function tonumber was nil)', msg)
end)
--------------------------------------------------------------------------------
-- Other assert types
SUITE:addTest('compare values', function ()
local _, msg = pcall(function ()
local a = 2
assert(a == 4)
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (number 4 expected, but got 2)', msg)
end)
SUITE:addTest('compare values across types', function ()
local _, msg = pcall(function ()
local a = "hi"
assert(a == 4)
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (number 4 expected, but got string "hi")', msg)
end)
SUITE:addTest('is nil', function ()
local _, msg = pcall(function ()
local a = "hi"
assert(a == nil)
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (nil expected, but got string "hi")', msg)
end)
SUITE:addTest('truthy', function ()
local _, msg = pcall(function ()
local a = false
assert(a)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (truthy expected, but got false)', msg)
end)
SUITE:addTest('truthy indexing', function ()
local _, msg = pcall(function ()
local a = { b = false }
assert(a.b)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad key "b" in local \'a\' (truthy expected, but got false)', msg)
end)
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SUITE:addTest('truthy subscript', function ()
local _, msg = pcall(function ()
local a = {}
assert(a[6])
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad key 6 in local \'a\' (truthy expected, but got nil)', msg)
end)
SUITE:addTest('truthy variable subscript', function ()
local _, msg = pcall(function ()
local a, i = {}, 3
assert(a[i])
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad key 3 in local \'a\' (truthy expected, but got nil)', msg)
end)
SUITE:addTest('not equal', function (constant_value, msg_in_pars)
local func = loadstring (("return function() local a = %s; assert(a ~= %s) end"):format(constant_value, constant_value)) ()
local _, msg = pcall(setfenv(func, getfenv()))
assert_equal('[string "return function() ..."]:1: assertion failed! bad local \'a\' ('..msg_in_pars..')', msg)
end, { data = {
{ 'true' , 'expected anything other than true, but got true' },
{ 'nil', 'expected anything other than nil, but got nil' },
{ '"hi"', 'expected anything other than string "hi", but got "hi"' },
{ '42', 'expected anything other than number 42, but got 42' },
}})
SUITE:addTest('constant false', function ()
local function f ()
assert(false)
end
local _, msg = pcall(function() f() end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-3)..': '..'assertion failed! this assert will always fail, as it\'s body is `false`. assumingly this should be an unreachable part of \'f\'', msg)
end)
SUITE:addTest('constant nil', function ()
local _, msg = pcall(function ()
assert(nil)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! this assert will always fail, as it\'s body is `nil`. assumingly this should be an unreachable part of the anonymous function at ./test/test_assert-gooder.lua:'..curline(-3), msg)
end)
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SUITE:addTest('function as type argument', function ()
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local f = function() end
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local _, msg = pcall(function ()
assert(type(f) == 'string')
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad upvalue \'f\' (string expected, but got '..tostring(f)..')', msg)
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end)
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SUITE:addTest('length of sequence EQUAL', function ()
local _, msg = pcall(function ()
local seq = {1, 2, 3, 4}
assert(#seq == 5)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad length of local \'seq\' (length 5 expected, but got length 4)', msg)
end)
SUITE:addTest('length of sequence LESS THAN', function ()
local _, msg = pcall(function ()
local seq = {1, 2, 3, 4}
assert(#seq < 3)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad length of local \'seq\' (length less than 3 expected, but got length 4)', msg)
end)
SUITE:addTest('length of sequence COMPARE', function ()
local _, msg = pcall(function ()
local seq_a = {1, 2, 3, 4}
local seq_b = {1, 2, 3}
assert(#seq_a == #seq_b)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad lengths of locals \'seq_a\' and \'seq_b\' (equal lengths expected, but got lengths 4 and 3)', msg)
end)
--------------------------------------------------------------------------------
-- Tables
SUITE:addTest('table with keys', function ()
local _, msg = pcall(function ()
local obj = { a = 42, b = 'euclidian fantasyland' }
assert(type(obj) == 'table' and type(obj.a) == 'string' and type(obj.b) == 'number')
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad of local \'obj\' (table similar to { a: string, b: number, ... } expected, but got { a = 42, b = "euclidian fantasyland" })', msg)
end)
SUITE:addTest('table with more keys', function ()
-- obj now has an extra key, this is reflected in the error
-- message, by adding the extra ellipsis.
local _, msg = pcall(function ()
local obj = { a = 42, b = 'euclidian fantasyland', c = {} }
assert(type(obj) == 'table' and type(obj.a) == 'string' and type(obj.b) == 'number')
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad of local \'obj\' (table similar to { a: string, b: number, ... } expected, but got { a = 42, b = "euclidian fantasyland", ... })', msg)
end)
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SUITE:addTest('table indexing', function ()
local _, msg = pcall(function ()
local obj = { hello = 4, world = 6, there = 2 }
local a = 'hullo'
assert(obj[a])
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (value of a should be key in local "obj", but was "hullo". close keys in "obj" include "hello", "world" and "there")', msg)
end)
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--------------------------------------------------------------------------------
SUITE:addTest('Number below something', function ()
local _, msg = pcall(function ()
local a = 6
assert(a < 5)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (number less than 5 expected, but got 6)', msg)
end)
SUITE:addTest('Number above something', function ()
local _, msg = pcall(function ()
local a = 6
assert(a > 10)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (number greater than 10 expected, but got 6)', msg)
end)
SUITE:addTest('Number between something', function ()
local _, msg = pcall(function ()
local a = 11
assert(a < 10 and 5 < a)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (number in range ]5,10[ expected, but got 6)', msg)
end)
SUITE:addTest('Number between something 2', function ()
local _, msg = pcall(function ()
local a = 11
assert(a < 10 and 7 <= a)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (number in range [7,10[ expected, but got 6)', msg)
end)
SUITE:addTest('Identify positive number', function ()
local _, msg = pcall(function ()
local a = -20
assert(0 <= a)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (positive number expected, but got negative number -20)', msg)
end)
SUITE:addTest('Identify integer', function ()
local _, msg = pcall(function ()
local a = 5.21
assert(a % 1 == 0)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (integer expected, but got decimal number 5.21)', msg)
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end)
SUITE:addTest('Identify even number', function ()
local _, msg = pcall(function ()
local a = 5
assert(a % 2 == 0)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (even number expected, but got odd number 5)', msg)
end)
SUITE:addTest('Identify odd number', function ()
local _, msg = pcall(function ()
local a = 6
assert(a % 2 == 1)
end)
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assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (odd number expected, but got even number 6)', msg)
end)
SUITE:addTest('Divisible by 3', function ()
local _, msg = pcall(function ()
local a = 7
assert(a % 3 == 0)
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'assertion failed! bad local \'a\' (integer divisible by 3 expected, but got integer 7 with remainder 1)', msg)
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end)
--------------------------------------------------------------------------------
-- Custom error message
SUITE:addTest('Custom error message', function ()
local _, msg = pcall(function ()
local a = 2
assert(type(a) == 'string', 'expected string')
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'expected string: bad local \'a\' (string expected, but got number 2)', msg)
end)
SUITE:addTest('Custom formatted message', function ()
local _, msg = pcall(function ()
local a = 2
assert(type(a) == 'string', 'expected string not %s', type(a))
end)
assert_equal('./test/test_assert-gooder.lua:'..curline(-2)..': '..'expected string not number: bad local \'a\' (string expected, but got number 2)', msg)
end)
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--------------------------------------------------------------------------------
return SUITE