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# encoding: utf-8
module I18n
module Tests
module Interpolation
# If no interpolation parameter is not given, I18n should not alter the string.
# This behavior is due to three reasons:
#
# * Checking interpolation keys in all strings hits performance, badly;
#
# * This allows us to retrieve untouched values through I18n. For example
# I could have a middleware that returns I18n lookup results in JSON
# to be processed through Javascript. Leaving the keys untouched allows
# the interpolation to happen at the javascript level;
#
# * Security concerns: if I allow users to translate a web site, they can
# insert %{} in messages causing the I18n lookup to fail in every request.
#
test "interpolation: given no values it does not alter the string" do
assert_equal 'Hi %{name}!', interpolate(:default => 'Hi %{name}!')
end
test "interpolation: given values it interpolates them into the string" do
assert_equal 'Hi David!', interpolate(:default => 'Hi %{name}!', :name => 'David')
end
test "interpolation: works with a pipe" do
assert_equal 'Hi david!', interpolate(:default => 'Hi %{name|lowercase}!', :'name|lowercase' => 'david')
end
test "interpolation: given a nil value it still interpolates it into the string" do
assert_equal 'Hi !', interpolate(:default => 'Hi %{name}!', :name => nil)
end
test "interpolation: given a lambda as a value it calls it if the string contains the key" do
assert_equal 'Hi David!', interpolate(:default => 'Hi %{name}!', :name => lambda { |*args| 'David' })
end
test "interpolation: given a lambda as a value it does not call it if the string does not contain the key" do
assert_nothing_raised { interpolate(:default => 'Hi!', :name => lambda { |*args| raise 'fail' }) }
end
test "interpolation: given values but missing a key it raises I18n::MissingInterpolationArgument" do
assert_raises(I18n::MissingInterpolationArgument) do
interpolate(:default => '%{foo}', :bar => 'bar')
end
end
test "interpolation: it does not raise I18n::MissingInterpolationArgument for escaped variables" do
assert_nothing_raised do
assert_equal 'Barr %{foo}', interpolate(:default => '%{bar} %%{foo}', :bar => 'Barr')
end
end
test "interpolation: it does not change the original, stored translation string" do
I18n.backend.store_translations(:en, :interpolate => 'Hi %{name}!')
assert_equal 'Hi David!', interpolate(:interpolate, :name => 'David')
assert_equal 'Hi Yehuda!', interpolate(:interpolate, :name => 'Yehuda')
end
test "interpolation: given an array interpolates each element" do
I18n.backend.store_translations(:en, :array_interpolate => ['Hi', 'Mr. %{name}', 'or sir %{name}'])
assert_equal ['Hi', 'Mr. Bartuz', 'or sir Bartuz'], interpolate(:array_interpolate, :name => 'Bartuz')
end
test "interpolation: given the translation is in utf-8 it still works" do
assert_equal 'Häi David!', interpolate(:default => 'Häi %{name}!', :name => 'David')
end
test "interpolation: given the value is in utf-8 it still works" do
assert_equal 'Hi ゆきひろ!', interpolate(:default => 'Hi %{name}!', :name => 'ゆきひろ')
end
test "interpolation: given the translation and the value are in utf-8 it still works" do
assert_equal 'こんにちは、ゆきひろさん!', interpolate(:default => 'こんにちは、%{name}さん!', :name => 'ゆきひろ')
end
if Object.const_defined?(:Encoding)
test "interpolation: given a euc-jp translation and a utf-8 value it raises Encoding::CompatibilityError" do
assert_raises(Encoding::CompatibilityError) do
interpolate(:default => euc_jp('こんにちは、%{name}さん!'), :name => 'ゆきひろ')
end
end
test "interpolation: given a utf-8 translation and a euc-jp value it raises Encoding::CompatibilityError" do
assert_raises(Encoding::CompatibilityError) do
interpolate(:default => 'こんにちは、%{name}さん!', :name => euc_jp('ゆきひろ'))
end
end
test "interpolation: ASCII strings in the backend should be encoded to UTF8 if interpolation options are in UTF8" do
I18n.backend.store_translations 'en', 'encoding' => ('%{who} let me go'.dup.force_encoding(Encoding::US_ASCII))
result = I18n.t 'encoding', :who => "måmmå miå"
assert_equal Encoding::UTF_8, result.encoding
end
test "interpolation: UTF8 strings in the backend are still returned as UTF8 with ASCII interpolation" do
I18n.backend.store_translations 'en', 'encoding' => 'måmmå miå %{what}'
result = I18n.t 'encoding', :what => 'let me go'.dup.force_encoding(Encoding::US_ASCII)
assert_equal Encoding::UTF_8, result.encoding
end
test "interpolation: UTF8 strings in the backend are still returned as UTF8 even with numbers interpolation" do
I18n.backend.store_translations 'en', 'encoding' => '%{count} times: måmmå miå'
result = I18n.t 'encoding', :count => 3
assert_equal Encoding::UTF_8, result.encoding
end
end
test "interpolation: given a translations containing a reserved key it raises I18n::ReservedInterpolationKey" do
assert_raises(I18n::ReservedInterpolationKey) { interpolate(:foo => :bar, :default => '%{exception_handler}') }
assert_raises(I18n::ReservedInterpolationKey) { interpolate(:foo => :bar, :default => '%{default}') }
assert_raises(I18n::ReservedInterpolationKey) { interpolate(:foo => :bar, :default => '%{separator}') }
assert_raises(I18n::ReservedInterpolationKey) { interpolate(:foo => :bar, :default => '%{scope}') }
assert_raises(I18n::ReservedInterpolationKey) { interpolate(:default => '%{scope}') }
I18n.backend.store_translations(:en, :interpolate => 'Hi %{scope}!')
assert_raises(I18n::ReservedInterpolationKey) { interpolate(:interpolate) }
end
test "interpolation: it does not raise I18n::ReservedInterpolationKey for escaped variables" do
assert_nothing_raised do
assert_equal '%{separator}', interpolate(:foo => :bar, :default => '%%{separator}')
end
# Note: The two interpolations below do not remove the escape character (%) because
# I18n should not alter the strings when no interpolation parameters are given,
# see the comment at the top of this file.
assert_nothing_raised do
assert_equal '%%{scope}', interpolate(:default => '%%{scope}')
end
I18n.backend.store_translations(:en, :interpolate => 'Hi %%{scope}!')
assert_nothing_raised do
assert_equal 'Hi %%{scope}!', interpolate(:interpolate)
end
end
test "interpolation: deep interpolation for default string" do
assert_equal 'Hi %{name}!', interpolate(:default => 'Hi %{name}!', :deep_interpolation => true)
end
test "interpolation: deep interpolation for interpolated string" do
assert_equal 'Hi Ann!', interpolate(:default => 'Hi %{name}!', :name => 'Ann', :deep_interpolation => true)
end
test "interpolation: deep interpolation for Hash" do
people = { :people => { :ann => 'Ann is %{ann}', :john => 'John is %{john}' } }
interpolated_people = { :people => { :ann => 'Ann is good', :john => 'John is big' } }
assert_equal interpolated_people, interpolate(:default => people, :ann => 'good', :john => 'big', :deep_interpolation => true)
end
test "interpolation: deep interpolation for Array" do
people = { :people => ['Ann is %{ann}', 'John is %{john}'] }
interpolated_people = { :people => ['Ann is good', 'John is big'] }
assert_equal interpolated_people, interpolate(:default => people, :ann => 'good', :john => 'big', :deep_interpolation => true)
end
protected
def capture(stream)
begin
stream = stream.to_s
eval "$#{stream} = StringIO.new"
yield
result = eval("$#{stream}").string
ensure
eval("$#{stream} = #{stream.upcase}")
end
result
end
def euc_jp(string)
string.encode(Encoding::EUC_JP)
end
def interpolate(*args)
options = args.last.is_a?(Hash) ? args.pop : {}
key = args.pop
I18n.backend.translate('en', key, options)
end
end
end
end
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