require 'test/unit' class TestIO < Test::Unit::TestCase def test_gets_rs # default_rs r, w = IO.pipe w.print "aaa\nbbb\n" w.close assert_equal "aaa\n", r.gets assert_equal "bbb\n", r.gets assert_nil r.gets r.close # nil r, w = IO.pipe w.print "a\n\nb\n\n" w.close assert_equal "a\n\nb\n\n", r.gets(nil) assert_nil r.gets("") r.close # "\377" r, w = IO.pipe w.print "\377xyz" w.close r.binmode assert_equal("\377", r.gets("\377"), "[ruby-dev:24460]") r.close # "" r, w = IO.pipe w.print "a\n\nb\n\n" w.close assert_equal "a\n\n", r.gets(""), "[ruby-core:03771]" assert_equal "b\n\n", r.gets("") assert_nil r.gets("") r.close end # This test cause SEGV. def test_ungetc r, w = IO.pipe w.close assert_raise(IOError, "[ruby-dev:31650]") { 20000.times { r.ungetc "a" } } ensure r.close end def test_each_byte r, w = IO.pipe w << "abc def" w.close r.each_byte {|byte| break if byte == 32 } assert_equal("def", r.read, "[ruby-dev:31659]") ensure r.close end end