Move `expect` functions to a separate file
This allows tests to test these functions without needing to include the test wrapper directly (now ci/test.lua, formerly test/main.lua). Hopefully this location is also more stable, similar to other libraries that are already tested.develop
lethosor
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-- Internal implementations of expect.*() functions for tests
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-- NOTE: do not use this module in tests directly! The test wrapper (ci/test.lua)
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-- wraps these functions to track which tests have passed/failed, and calling
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-- these functions directly will not work as expected.
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local expect = mkmodule('test.expect')
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function expect.true_(value, comment)
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return not not value, comment, 'expected true, got ' .. tostring(value)
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end
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function expect.false_(value, comment)
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return not value, comment, 'expected false, got ' .. tostring(value)
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end
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function expect.fail(comment)
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return false, comment or 'check failed, no reason provided'
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end
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function expect.nil_(value, comment)
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return value == nil, comment, 'expected nil, got ' .. tostring(value)
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end
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function expect.eq(a, b, comment)
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return a == b, comment, ('%s ~= %s'):format(a, b)
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end
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function expect.ne(a, b, comment)
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return a ~= b, comment, ('%s == %s'):format(a, b)
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end
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function expect.lt(a, b, comment)
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return a < b, comment, ('%s >= %s'):format(a, b)
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end
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function expect.le(a, b, comment)
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return a <= b, comment, ('%s > %s'):format(a, b)
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end
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function expect.gt(a, b, comment)
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return a > b, comment, ('%s <= %s'):format(a, b)
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end
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function expect.ge(a, b, comment)
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return a >= b, comment, ('%s < %s'):format(a, b)
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end
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local function table_eq_recurse(a, b, keys, known_eq)
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if a == b then return true end
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local checked = {}
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for k,v in pairs(a) do
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if type(a[k]) == 'table' then
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if known_eq[a[k]] and known_eq[a[k]][b[k]] then goto skip end
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table.insert(keys, tostring(k))
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if type(b[k]) ~= 'table' then
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return false, keys, {tostring(a[k]), tostring(b[k])}
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end
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if not known_eq[a[k]] then known_eq[a[k]] = {} end
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for eq_tab,_ in pairs(known_eq[a[k]]) do
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known_eq[eq_tab][b[k]] = true
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end
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known_eq[a[k]][b[k]] = true
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if not known_eq[b[k]] then known_eq[b[k]] = {} end
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for eq_tab,_ in pairs(known_eq[b[k]]) do
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known_eq[eq_tab][a[k]] = true
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end
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known_eq[b[k]][a[k]] = true
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local matched, keys_at_diff, diff =
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table_eq_recurse(a[k], b[k], keys, known_eq)
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if not matched then return false, keys_at_diff, diff end
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keys[#keys] = nil
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elseif a[k] ~= b[k] then
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table.insert(keys, tostring(k))
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return false, keys, {tostring(a[k]), tostring(b[k])}
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end
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::skip::
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checked[k] = true
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end
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for k in pairs(b) do
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if not checked[k] then
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table.insert(keys, tostring(k))
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return false, keys, {tostring(a[k]), tostring(b[k])}
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end
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end
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return true
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end
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function expect.table_eq(a, b, comment)
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if (type(a) ~= 'table' and type(a) ~= 'userdata') or
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(type(b) ~= 'table' and type(b) ~= 'userdata') then
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return false, comment, 'operands to table_eq must be tables or userdata'
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end
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local keys, known_eq = {}, {}
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local matched, keys_at_diff, diff = table_eq_recurse(a, b, keys, known_eq)
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if matched then return true end
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local keystr = '['..keys_at_diff[1]..']'
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for i=2,#keys_at_diff do keystr = keystr..'['..keys_at_diff[i]..']' end
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return false, comment,
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('key %s: "%s" ~= "%s"'):format(keystr, diff[1], diff[2])
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end
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function expect.error(func, ...)
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local ok, ret = pcall(func, ...)
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if ok then
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return false, 'no error raised by function call'
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else
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return true
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end
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end
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function expect.error_match(func, matcher, ...)
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local ok, err = pcall(func, ...)
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if ok then
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return false, 'no error raised by function call'
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elseif type(matcher) == 'string' then
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if not tostring(err):match(matcher) then
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return false, ('error "%s" did not match "%s"'):format(err, matcher)
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end
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elseif not matcher(err) then
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return false, ('error "%s" did not satisfy matcher'):format(err)
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end
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return true
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end
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function expect.pairs_contains(table, key, comment)
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for k, v in pairs(table) do
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if k == key then
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return true
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end
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end
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return false, comment, ('could not find key "%s" in table'):format(key)
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end
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function expect.not_pairs_contains(table, key, comment)
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for k, v in pairs(table) do
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if k == key then
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return false, comment, ('found key "%s" in table'):format(key)
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end
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end
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return true
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end
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return expect
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