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i18n_spec.lua
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i18n_spec.lua
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--[[
Tests for src/core/i18n.lua
Tests language loading, get, exists, translate with interpolation.
]]
describe('core.i18n', function()
local i18n
-- Mock language tables
local mock_en_gb = {
errors = {
connection = 'Connection error.',
admin = 'You need to be an admin.',
},
ban = {
success = '{admin} has banned {target}.',
specify = 'Please specify the user to ban.',
},
help = {
greeting = 'Hey {name}!',
},
}
local mock_de_de = {
errors = {
connection = 'Verbindungsfehler.',
admin = 'Du musst ein Admin sein.',
},
ban = {
success = '{admin} hat {target} gebannt.',
},
}
before_each(function()
package.loaded['src.core.i18n'] = nil
package.loaded['src.core.config'] = {
get = function(key, default) return default end,
is_enabled = function() return false end,
load = function() end,
debug = function() return false end,
VERSION = '2.0',
}
package.loaded['src.core.logger'] = {
debug = function() end,
info = function() end,
warn = function() end,
error = function() end,
}
-- Mock the language registry and language files
package.loaded['src.languages.init'] = {
en_gb = 'src.languages.en_gb',
de_de = 'src.languages.de_de',
}
package.loaded['src.languages.en_gb'] = mock_en_gb
package.loaded['src.languages.de_de'] = mock_de_de
i18n = require('src.core.i18n')
i18n.init()
end)
describe('init()', function()
it('should load languages from the registry', function()
assert.is_true(i18n.count() > 0)
end)
it('should load exactly the number of languages in the registry', function()
assert.are.equal(2, i18n.count())
end)
end)
describe('get()', function()
it('should return a language table by code', function()
local lang = i18n.get('en_gb')
assert.is_not_nil(lang)
assert.are.equal('Connection error.', lang.errors.connection)
end)
it('should return German language', function()
local lang = i18n.get('de_de')
assert.is_not_nil(lang)
assert.are.equal('Verbindungsfehler.', lang.errors.connection)
end)
it('should fall back to en_gb for unknown code', function()
local lang = i18n.get('zz_zz')
assert.is_not_nil(lang)
assert.are.equal('Connection error.', lang.errors.connection)
end)
it('should fall back to en_gb for nil code', function()
local lang = i18n.get(nil)
assert.is_not_nil(lang)
assert.are.equal('Connection error.', lang.errors.connection)
end)
end)
describe('exists()', function()
it('should return true for loaded languages', function()
assert.is_true(i18n.exists('en_gb'))
assert.is_true(i18n.exists('de_de'))
end)
it('should return false for unloaded languages', function()
assert.is_false(i18n.exists('zz_zz'))
assert.is_false(i18n.exists('fr_fr'))
end)
end)
describe('available()', function()
it('should return sorted list of codes', function()
local codes = i18n.available()
assert.are.equal(2, #codes)
-- Sorted alphabetically
assert.are.equal('de_de', codes[1])
assert.are.equal('en_gb', codes[2])
end)
end)
describe('count()', function()
it('should return the number of loaded languages', function()
assert.are.equal(2, i18n.count())
end)
end)
describe('t() - translation', function()
it('should traverse nested keys', function()
local result = i18n.t(mock_en_gb, 'errors', 'connection')
assert.are.equal('Connection error.', result)
end)
it('should return nil for missing key', function()
local result = i18n.t(mock_en_gb, 'nonexistent', 'key')
assert.is_nil(result)
end)
it('should return nil for partially missing key', function()
local result = i18n.t(mock_en_gb, 'errors', 'nonexistent')
assert.is_nil(result)
end)
it('should interpolate variables', function()
local result = i18n.t(mock_en_gb, 'ban', 'success', { admin = 'Alice', target = 'Bob' })
assert.are.equal('Alice has banned Bob.', result)
end)
it('should handle multiple interpolation variables', function()
local result = i18n.t(mock_en_gb, 'help', 'greeting', { name = 'Matt' })
assert.are.equal('Hey Matt!', result)
end)
it('should accept language code string as first arg', function()
local result = i18n.t('en_gb', 'errors', 'connection')
assert.are.equal('Connection error.', result)
end)
it('should fall back to default lang for unknown code string', function()
local result = i18n.t('zz_zz', 'errors', 'connection')
assert.are.equal('Connection error.', result)
end)
it('should return nil when value is a table not a string', function()
local result = i18n.t(mock_en_gb, 'errors')
assert.is_nil(result)
end)
it('should handle nil lang_table by falling back', function()
local result = i18n.t(nil, 'errors', 'connection')
assert.are.equal('Connection error.', result)
end)
it('should return simple string without interpolation', function()
local result = i18n.t(mock_en_gb, 'ban', 'specify')
assert.are.equal('Please specify the user to ban.', result)
end)
end)
end)

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