test/-ext-/string/test_ellipsize.rb

   1 # frozen_string_literal: false
   2 require 'test/unit'
   3 require "-test-/string"
   4
   5 class Test_StringEllipsize < Test::Unit::TestCase
   6   def setup
   7     @foobar = Bug::String.new("foobar")
   8   end
   9
  10   def assert_equal_with_class(expected, result, *rest)
  11     assert_equal(expected.encoding, result.encoding, *rest)
  12     assert_equal(expected, result, result.encoding.name)
  13     assert_instance_of(String, result, *rest)
  14   end
  15
  16   def test_longer
  17     assert_equal_with_class("", @foobar.ellipsize(0))
  18     assert_equal_with_class(".", @foobar.ellipsize(1))
  19     assert_equal_with_class("..", @foobar.ellipsize(2))
  20     assert_equal_with_class("...", @foobar.ellipsize(3))
  21     assert_equal_with_class("f...", @foobar.ellipsize(4))
  22     assert_equal_with_class("fo...", @foobar.ellipsize(5))
  23   end
  24
  25   def test_shorter
  26     assert_same(@foobar, @foobar.ellipsize(6))
  27     assert_same(@foobar, @foobar.ellipsize(7))
  28   end
  29
  30   def test_negative_length
  31     assert_raise(IndexError) {@foobar.ellipsize(-1)}
  32   end
  33
  34   def test_nonascii
  35     a = "\u3042"
  36     Encoding.list.each do |enc|
  37       next if enc.dummy?
  38       begin
  39         s = a.encode(enc)
  40         e = "...".encode(enc)
  41       rescue
  42       else
  43         assert_equal_with_class(s*12+e, Bug::String.new(s*20).ellipsize(15))
  44       end
  45     end
  46   end
  47 end