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require 'test_helper'
class I18nBackendPluralizationTest < I18n::TestCase
class Backend < I18n::Backend::Simple
include I18n::Backend::Pluralization
include I18n::Backend::Fallbacks
end
def setup
super
I18n.backend = Backend.new
@rule = lambda { |n| n % 10 == 1 && n % 100 != 11 ? :one : n == 0 || (2..10).include?(n % 100) ? :few : (11..19).include?(n % 100) ? :many : :other }
store_translations(:xx, :i18n => { :plural => { :rule => @rule } })
@entry = { :"0" => 'none', :"1" => 'single', :one => 'one', :few => 'few', :many => 'many', :other => 'other' }
@entry_with_zero = @entry.merge( { :zero => 'zero' } )
end
test "pluralization picks a pluralizer from :'i18n.pluralize'" do
assert_equal @rule, I18n.backend.send(:pluralizer, :xx)
end
test "pluralization picks the explicit 1 rule for count == 1, the explicit rule takes priority over the matching :one rule" do
assert_equal 'single', I18n.t(:count => 1, :default => @entry, :locale => :xx)
assert_equal 'single', I18n.t(:count => 1.0, :default => @entry, :locale => :xx)
end
test "pluralization picks :one for 1, since in this case that is the matching rule for 1 (when there is no explicit 1 rule)" do
@entry.delete(:"1")
assert_equal 'one', I18n.t(:count => 1, :default => @entry, :locale => :xx)
end
test "pluralization picks :few for 2" do
assert_equal 'few', I18n.t(:count => 2, :default => @entry, :locale => :xx)
end
test "pluralization picks :many for 11" do
assert_equal 'many', I18n.t(:count => 11, :default => @entry, :locale => :xx)
end
test "pluralization picks zero for 0 if the key is contained in the data" do
assert_equal 'zero', I18n.t(:count => 0, :default => @entry_with_zero, :locale => :xx)
end
test "pluralization picks explicit 0 rule for count == 0, since the explicit rule takes priority over the matching :few rule" do
assert_equal 'none', I18n.t(:count => 0, :default => @entry, :locale => :xx)
assert_equal 'none', I18n.t(:count => 0.0, :default => @entry, :locale => :xx)
assert_equal 'none', I18n.t(:count => -0, :default => @entry, :locale => :xx)
end
test "pluralization picks :few for 0 (when there is no explicit 0 rule)" do
@entry.delete(:"0")
assert_equal 'few', I18n.t(:count => 0, :default => @entry, :locale => :xx)
end
test "pluralization does Lateral Inheritance to :other to cover missing data" do
@entry.delete(:many)
assert_equal 'other', I18n.t(:count => 11, :default => @entry, :locale => :xx)
end
test "pluralization picks one for 1 if the entry has attributes hash on unknown locale" do
@entry[:attributes] = { :field => 'field', :second => 'second' }
assert_equal 'one', I18n.t(:count => 1, :default => @entry, :locale => :pirate)
end
test "Nested keys within pluralization context" do
store_translations(:xx,
:stars => {
one: "%{count} star",
other: "%{count} stars",
special: {
one: "%{count} special star",
other: "%{count} special stars",
}
}
)
assert_equal "1 star", I18n.t('stars', count: 1, :locale => :xx)
assert_equal "20 stars", I18n.t('stars', count: 20, :locale => :xx)
assert_equal "1 special star", I18n.t('stars.special', count: 1, :locale => :xx)
assert_equal "20 special stars", I18n.t('stars.special', count: 20, :locale => :xx)
end
test "Fallbacks can pick up rules from fallback locales, too" do
assert_equal @rule, I18n.backend.send(:pluralizer, :'xx-XX')
end
test "linked lookup works with pluralization backend" do
I18n.backend.store_translations(:xx, {
:automobiles => :autos,
:autos => :cars,
:cars => { :porsche => { :one => "I have %{count} Porsche 🚗", :other => "I have %{count} Porsches 🚗" } }
})
assert_equal "I have 1 Porsche 🚗", I18n.t(:'automobiles.porsche', count: 1, :locale => :xx)
assert_equal "I have 20 Porsches 🚗", I18n.t(:'automobiles.porsche', count: 20, :locale => :xx)
end
end
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