780 lines
19 KiB
Ruby
Vendored
780 lines
19 KiB
Ruby
Vendored
##
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# String(Ext) Test
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UTF8STRING = __ENCODING__ == "UTF-8"
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def assert_upto(exp, receiver, *args)
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act = []
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receiver.upto(*args) { |v| act << v }
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assert_equal exp, act
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end
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assert('String#dump') do
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assert_equal("\"\\x00\"", "\0".dump)
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assert_equal("\"foo\"", "foo".dump)
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assert_equal('"\xe3\x82\x8b"', "る".dump)
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assert_nothing_raised { ("\1" * 100).dump } # regress #1210
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end
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assert('String#strip') do
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s = " abc "
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assert_equal("abc", s.strip)
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assert_equal(" abc ", s)
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assert_equal("", "".strip)
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assert_equal("", " \t\r\n\f\v".strip)
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assert_equal("\0a", "\0a\0".strip)
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assert_equal("abc", "abc".strip)
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assert_equal("abc", " abc".strip)
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assert_equal("abc", "abc ".strip)
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end
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assert('String#lstrip') do
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s = " abc "
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assert_equal("abc ", s.lstrip)
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assert_equal(" abc ", s)
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assert_equal("", "".lstrip)
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assert_equal("", " \t\r\n\f\v".lstrip)
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assert_equal("\0a\0", "\0a\0".lstrip)
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assert_equal("abc", "abc".lstrip)
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assert_equal("abc", " abc".lstrip)
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assert_equal("abc ", "abc ".lstrip)
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end
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assert('String#rstrip') do
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s = " abc "
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assert_equal(" abc", s.rstrip)
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assert_equal(" abc ", s)
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assert_equal("", "".rstrip)
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assert_equal("", " \t\r\n\f\v".rstrip)
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assert_equal("\0a", "\0a\0".rstrip)
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assert_equal("abc", "abc".rstrip)
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assert_equal(" abc", " abc".rstrip)
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assert_equal("abc", "abc ".rstrip)
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end
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assert('String#strip!') do
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s = " abc "
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t = "abc"
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assert_equal("abc", s.strip!)
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assert_equal("abc", s)
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assert_nil(t.strip!)
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assert_equal("abc", t)
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end
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assert('String#lstrip!') do
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s = " abc "
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t = "abc "
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assert_equal("abc ", s.lstrip!)
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assert_equal("abc ", s)
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assert_nil(t.lstrip!)
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assert_equal("abc ", t)
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end
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assert('String#rstrip!') do
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s = " abc "
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t = " abc"
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assert_equal(" abc", s.rstrip!)
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assert_equal(" abc", s)
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assert_nil(t.rstrip!)
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assert_equal(" abc", t)
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end
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assert('String#swapcase') do
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assert_equal "hELLO", "Hello".swapcase
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assert_equal "CyBeR_pUnK11", "cYbEr_PuNk11".swapcase
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end
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assert('String#swapcase!') do
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s = "Hello"
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t = s.clone
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t.swapcase!
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assert_equal s.swapcase, t
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end
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assert('String#concat') do
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assert_equal "Hello World!", "Hello " << "World" << 33
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assert_equal "Hello World!", "Hello ".concat("World").concat(33)
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assert_raise(TypeError) { "".concat(Object.new) }
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if UTF8STRING
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assert_equal "H«", "H" << 0xab
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assert_equal "Hは", "H" << 12399
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else
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assert_equal "H\xab", "H" << 0xab
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assert_raise(RangeError) { "H" << 12399 }
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end
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end
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assert('String#casecmp') do
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assert_equal 1, "abcdef".casecmp("abcde")
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assert_equal 0, "aBcDeF".casecmp("abcdef")
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assert_equal(-1, "abcdef".casecmp("abcdefg"))
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assert_equal 0, "abcdef".casecmp("ABCDEF")
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end
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assert('String#count') do
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s = "abccdeff123"
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assert_equal 0, s.count("")
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assert_equal 1, s.count("a")
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assert_equal 2, s.count("ab")
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assert_equal 9, s.count("^c")
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assert_equal 8, s.count("a-z")
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assert_equal 4, s.count("a0-9")
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end
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assert('String#tr') do
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assert_equal "ABC", "abc".tr('a-z', 'A-Z')
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assert_equal "hippo", "hello".tr('el', 'ip')
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assert_equal "Ruby", "Lisp".tr("Lisp", "Ruby")
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assert_equal "*e**o", "hello".tr('^aeiou', '*')
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assert_equal "heo", "hello".tr('l', '')
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end
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assert('String#tr!') do
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s = "abcdefghijklmnopqR"
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assert_equal "ab12222hijklmnopqR", s.tr!("cdefg", "12")
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assert_equal "ab12222hijklmnopqR", s
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end
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assert('String#tr_s') do
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assert_equal "hero", "hello".tr_s('l', 'r')
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assert_equal "h*o", "hello".tr_s('el', '*')
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assert_equal "hhxo", "hello".tr_s('el', 'hx')
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end
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assert('String#tr_s!') do
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s = "hello"
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assert_equal "hero", s.tr_s!('l', 'r')
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assert_equal "hero", s
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assert_nil s.tr_s!('l', 'r')
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end
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assert('String#squeeze') do
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assert_equal "yelow mon", "yellow moon".squeeze
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assert_equal " now is the", " now is the".squeeze(" ")
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assert_equal "puters shot balls", "putters shoot balls".squeeze("m-z")
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end
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assert('String#squeeze!') do
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s = " now is the"
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assert_equal " now is the", s.squeeze!(" ")
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assert_equal " now is the", s
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end
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assert('String#delete') do
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assert_equal "he", "hello".delete("lo")
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assert_equal "hll", "hello".delete("aeiou")
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assert_equal "ll", "hello".delete("^l")
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assert_equal "ho", "hello".delete("ej-m")
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end
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assert('String#delete!') do
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s = "hello"
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assert_equal "he", s.delete!("lo")
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assert_equal "he", s
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assert_nil s.delete!("lz")
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end
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assert('String#start_with?') do
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assert_true "hello".start_with?("heaven", "hell")
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assert_true !"hello".start_with?("heaven", "paradise")
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assert_true !"h".start_with?("heaven", "hell")
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assert_raise TypeError do "hello".start_with?(true) end
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end
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assert('String#end_with?') do
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assert_true "string".end_with?("ing", "mng")
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assert_true !"string".end_with?("str", "tri")
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assert_true !"ng".end_with?("ing", "mng")
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assert_raise TypeError do "hello".end_with?(true) end
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end
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assert('String#partition') do
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assert_equal ["a", "x", "axa"], "axaxa".partition("x")
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assert_equal ["aaaaa", "", ""], "aaaaa".partition("x")
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assert_equal ["", "", "aaaaa"], "aaaaa".partition("")
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assert_equal ["", "a", "aaaa"], "aaaaa".partition("a")
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assert_equal ["aaaa", "b", ""], "aaaab".partition("b")
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assert_equal ["", "b", "aaaa"], "baaaa".partition("b")
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assert_equal ["", "", ""], "".partition("a")
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assert_equal ["hello", " ", "world"], "hello world".partition(" ")
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assert_equal ["hell", "o", " world"], "hello world".partition("o")
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assert_equal ["hello world", "", ""], "hello world".partition("x")
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end
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assert('String#rpartition') do
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assert_equal ["axa", "x", "a"], "axaxa".rpartition("x")
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assert_equal ["", "", "aaaaa"], "aaaaa".rpartition("x")
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assert_equal ["aaaaa", "", ""], "aaaaa".rpartition("")
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assert_equal ["aaaa", "a", ""], "aaaaa".rpartition("a")
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assert_equal ["aaaa", "b", ""], "aaaab".rpartition("b")
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assert_equal ["", "b", "aaaa"], "baaaa".rpartition("b")
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assert_equal ["", "", ""], "".rpartition("a")
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assert_equal ["hello", " ", "world"], "hello world".rpartition(" ")
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assert_equal ["hello w", "o", "rld"], "hello world".rpartition("o")
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assert_equal ["", "", "hello world"], "hello world".rpartition("x")
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end
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assert('String#hex') do
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assert_equal 16, "10".hex
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assert_equal 255, "ff".hex
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assert_equal 16, "0x10".hex
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assert_equal (-16), "-0x10".hex
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assert_equal 0, "xyz".hex
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assert_equal 16, "10z".hex
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assert_equal 16, "1_0".hex
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assert_equal 0, "".hex
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end
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assert('String#oct') do
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assert_equal 8, "10".oct
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assert_equal 7, "7".oct
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assert_equal 0, "8".oct
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assert_equal 0, "9".oct
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assert_equal 0, "xyz".oct
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assert_equal 8, "10z".oct
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assert_equal 8, "1_0".oct
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assert_equal 8, "010".oct
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assert_equal (-8), "-10".oct
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end
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assert('String#lines') do
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assert_equal ["Hel\n", "lo\n", "World!"], "Hel\nlo\nWorld!".lines
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assert_equal ["Hel\n", "lo\n", "World!\n"], "Hel\nlo\nWorld!\n".lines
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assert_equal ["\n", "\n", "\n"], "\n\n\n".lines
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assert_equal [], "".lines
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end
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assert('String#clear') do
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# embed string
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s = "foo"
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assert_equal("", s.clear)
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assert_equal("", s)
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# not embed string and not shared string
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s = "foo" * 100
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a = s
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assert_equal("", s.clear)
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assert_equal("", s)
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assert_equal("", a)
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# shared string
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s = "foo" * 100
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a = s[10, 90] # create shared string
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assert_equal("", s.clear) # clear
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assert_equal("", s) # s is cleared
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assert_not_equal("", a) # a should not be affected
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end
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assert('String#slice!') do
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a = "AooBar"
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b = a.dup
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assert_equal "A", a.slice!(0)
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assert_equal "AooBar", b
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a = "FooBar"
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assert_equal "r", a.slice!(-1)
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assert_equal "FooBa", a
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a = "FooBar"
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assert_nil a.slice!(6)
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assert_nil a.slice!(-7)
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assert_equal "FooBar", a
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a = "FooBar"
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assert_equal "Foo", a.slice!(0, 3)
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assert_equal "Bar", a
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a = "FooBar"
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assert_equal "Bar", a.slice!(-3, 3)
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assert_equal "Foo", a
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a = "FooBar"
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assert_equal "", a.slice!(6, 2)
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assert_equal "FooBar", a
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a = "FooBar"
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assert_nil a.slice!(-7,10)
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assert_equal "FooBar", a
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a = "FooBar"
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assert_equal "Foo", a.slice!(0..2)
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assert_equal "Bar", a
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a = "FooBar"
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assert_equal "Bar", a.slice!(-3..-1)
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assert_equal "Foo", a
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a = "FooBar"
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assert_equal "", a.slice!(6..2)
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assert_equal "FooBar", a
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a = "FooBar"
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assert_nil a.slice!(-10..-7)
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assert_equal "FooBar", a
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a = "FooBar"
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assert_equal "Foo", a.slice!("Foo")
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assert_equal "Bar", a
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a = "FooBar"
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assert_nil a.slice!("xyzzy")
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assert_equal "FooBar", a
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assert_raise(ArgumentError) { "foo".slice! }
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end
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assert('String#succ') do
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assert_equal "", "".succ
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assert_equal "1", "0".succ
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assert_equal "10", "9".succ
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assert_equal "01", "00".succ
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assert_equal "a1", "a0".succ
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assert_equal "A1", "A0".succ
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assert_equal "10", "09".succ
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assert_equal "b0", "a9".succ
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assert_equal "B0", "A9".succ
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assert_equal "b", "a".succ
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assert_equal "aa", "z".succ
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assert_equal "ab", "aa".succ
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assert_equal "Ab", "Aa".succ
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assert_equal "0b", "0a".succ
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assert_equal "ba", "az".succ
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assert_equal "Ba", "Az".succ
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assert_equal "1a", "0z".succ
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assert_equal "B", "A".succ
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assert_equal "AA", "Z".succ
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assert_equal "AB", "AA".succ
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assert_equal "aB", "aA".succ
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assert_equal "0B", "0A".succ
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assert_equal "BA", "AZ".succ
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assert_equal "bA", "aZ".succ
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assert_equal "1A", "0Z".succ
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assert_equal ".", "-".succ
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assert_equal "\x01\x00", "\xff".succ
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assert_equal "-b", "-a".succ
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assert_equal "-aa", "-z".succ
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assert_equal "-a-b-", "-a-a-".succ
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assert_equal "-b-", "-a-".succ
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assert_equal "-aa-", "-z-".succ
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assert_equal "あb", "あa".succ
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assert_equal "あba", "あaz".succ
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a = ""; a.succ!
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assert_equal "", a
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a = "0"; a.succ!
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assert_equal "1", a
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a = "9"; a.succ!
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assert_equal "10", a
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a = "00"; a.succ!
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assert_equal "01", a
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a = "a0"; a.succ!
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assert_equal "a1", a
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a = "A0"; a.succ!
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assert_equal "A1", a
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a = "09"; a.succ!
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assert_equal "10", a
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a = "a9"; a.succ!
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assert_equal "b0", a
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a = "A9"; a.succ!
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assert_equal "B0", a
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a = "a"; a.succ!
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assert_equal "b", a
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a = "z"; a.succ!
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assert_equal "aa", a
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a = "aa"; a.succ!
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assert_equal "ab", a
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a = "Aa"; a.succ!
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assert_equal "Ab", a
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a = "0a"; a.succ!
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assert_equal "0b", a
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a = "az"; a.succ!
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assert_equal "ba", a
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a = "Az"; a.succ!
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assert_equal "Ba", a
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a = "0z"; a.succ!
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assert_equal "1a", a
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a = "A"; a.succ!
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assert_equal "B", a
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a = "Z"; a.succ!
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assert_equal "AA", a
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a = "AA"; a.succ!
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assert_equal "AB", a
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a = "aA"; a.succ!
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assert_equal "aB", a
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a = "0A"; a.succ!
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assert_equal "0B", a
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a = "AZ"; a.succ!
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assert_equal "BA", a
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a = "aZ"; a.succ!
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assert_equal "bA", a
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a = "0Z"; a.succ!
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assert_equal "1A", a
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a = "-"; a.succ!
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assert_equal ".", a
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a = "\xff"; a.succ!
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assert_equal "\x01\x00", a
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a = "-a"; a.succ!
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assert_equal "-b", a
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a = "-z"; a.succ!
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assert_equal "-aa", a
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a = "-a-a-"; a.succ!
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assert_equal "-a-b-", a
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a = "-a-"; a.succ!
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assert_equal "-b-", a
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a = "-z-"; a.succ!
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assert_equal "-aa-", a
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a = "あb"; a.succ!
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assert_equal "あc", a
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a = "あaz"; a.succ!
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assert_equal "あba", a
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end
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assert('String#next') do
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assert_equal "01", "00".next
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a = "00"; a.next!
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assert_equal "01", a
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end
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assert('String#insert') do
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assert_equal "Xabcd", "abcd".insert(0, 'X')
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assert_equal "abcXd", "abcd".insert(3, 'X')
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assert_equal "abcdX", "abcd".insert(4, 'X')
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assert_equal "abXcd", "abcd".insert(-3, 'X')
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assert_equal "abcdX", "abcd".insert(-1, 'X')
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assert_raise(IndexError) { "abcd".insert(5, 'X') }
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assert_raise(IndexError) { "abcd".insert(-6, 'X') }
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a = "abcd"
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a.insert(0, 'X')
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assert_equal "Xabcd", a
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end
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assert('String#prepend') do
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# Basic prepend test
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a = "world"
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assert_equal "hello world", a.prepend("hello ")
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assert_equal "hello world", a
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# Multiple arguments test
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b = "world"
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assert_equal "hello beautiful world", b.prepend("hello ", "beautiful ")
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assert_equal "hello beautiful world", b
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# Empty string test
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c = "test"
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assert_equal "test", c.prepend("")
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assert_equal "test", c
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# No arguments test
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d = "test"
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assert_equal "test", d.prepend()
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assert_equal "test", d
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# Prepend to empty string
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e = ""
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assert_equal "hello", e.prepend("hello")
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assert_equal "hello", e
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# Multiple empty strings
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f = "world"
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assert_equal "world", f.prepend("", "", "")
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assert_equal "world", f
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# Mixed empty and non-empty
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g = "world"
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assert_equal "hello world", g.prepend("", "hello ", "")
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assert_equal "hello world", g
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# Self-referencing arguments (GHSA-3hgj-g76g-878c)
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h = "A" * 100
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h.prepend(h, h)
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|
assert_equal 300, h.length
|
|
assert_equal "A" * 300, h
|
|
|
|
# Mixed self-reference and literal
|
|
i = "AB"
|
|
i.prepend("XYZ", i)
|
|
assert_equal "XYZABAB", i
|
|
|
|
j = "AB"
|
|
j.prepend(j, "X", j)
|
|
assert_equal "ABXABAB", j
|
|
end
|
|
|
|
assert('String#ljust') do
|
|
assert_equal "hello", "hello".ljust(4)
|
|
assert_equal "hello ", "hello".ljust(20)
|
|
assert_equal 20, "hello".ljust(20).length
|
|
assert_equal "hello123412341234123", "hello".ljust(20, '1234')
|
|
assert_equal "hello", "hello".ljust(-3)
|
|
end
|
|
|
|
assert('String#rjust') do
|
|
assert_equal "hello", "hello".rjust(4)
|
|
assert_equal " hello", "hello".rjust(20)
|
|
assert_equal 20, "hello".rjust(20).length
|
|
assert_equal "123412341234123hello", "hello".rjust(20, '1234')
|
|
assert_equal "hello", "hello".rjust(-3)
|
|
end
|
|
|
|
assert('String#center') do
|
|
assert_equal "hello", "hello".center(4)
|
|
assert_equal " hello ", "hello".center(20)
|
|
assert_equal 20, "hello".center(20).length
|
|
assert_equal "1231231hello12312312", "hello".center(20, '123')
|
|
assert_equal "hello", "hello".center(-3)
|
|
end
|
|
|
|
if UTF8STRING
|
|
assert('String#ljust with UTF8') do
|
|
assert_equal "helloん ", "helloん".ljust(20)
|
|
assert_equal "helloó ", "helloó".ljust(34)
|
|
assert_equal 34, "helloó".ljust(34).length
|
|
assert_equal "helloんんんんんんんんんんんんんん", "hello".ljust(19, 'ん')
|
|
assert_equal "helloんんんんんんんんんんんんんんん", "hello".ljust(20, 'ん')
|
|
end
|
|
|
|
assert('String#rjust with UTF8') do
|
|
assert_equal " helloん", "helloん".rjust(20)
|
|
assert_equal " helloó", "helloó".rjust(34)
|
|
# assert_equal 34, "helloó".rjust(34).length
|
|
assert_equal "んんんんんんんんんんんんんんhello", "hello".rjust(19, 'ん')
|
|
assert_equal "んんんんんんんんんんんんんんんhello", "hello".rjust(20, 'ん')
|
|
end
|
|
|
|
assert('UTF8 byte counting') do
|
|
ret = ' '
|
|
ret[-6..-1] = "helloó"
|
|
assert_equal 34, ret.length
|
|
end
|
|
end
|
|
|
|
assert('String#ljust should not change string') do
|
|
a = "hello"
|
|
a.ljust(20)
|
|
assert_equal "hello", a
|
|
end
|
|
|
|
assert('String#rjust should not change string') do
|
|
a = "hello"
|
|
a.rjust(20)
|
|
assert_equal "hello", a
|
|
end
|
|
|
|
assert('String#ljust should raise on zero width padding') do
|
|
assert_raise(ArgumentError) { "foo".ljust(10, '') }
|
|
end
|
|
|
|
assert('String#rjust should raise on zero width padding') do
|
|
assert_raise(ArgumentError) { "foo".rjust(10, '') }
|
|
end
|
|
|
|
assert('String#upto') do
|
|
assert_upto %w(a8 a9 b0 b1 b2 b3 b4 b5 b6), "a8", "b6"
|
|
assert_upto ["9", "10", "11"], "9", "11"
|
|
assert_upto [], "25", "5"
|
|
assert_upto ["07", "08", "09", "10", "11"], "07", "11"
|
|
assert_upto ["9", ":", ";", "<", "=", ">", "?", "@", "A"], "9", "A"
|
|
|
|
if UTF8STRING
|
|
assert_upto %w(あ ぃ い ぅ う ぇ え ぉ お), "あ", "お"
|
|
end
|
|
|
|
a = "aa"
|
|
start = "aa"
|
|
count = 0
|
|
assert_equal("aa", a.upto("zz") {|s|
|
|
assert_equal(start, s)
|
|
start.succ!
|
|
count += 1
|
|
})
|
|
assert_equal(676, count)
|
|
|
|
a = "a"
|
|
start = "a"
|
|
count = 0
|
|
assert_equal("a", a.upto("a") {|s|
|
|
assert_equal(start, s)
|
|
start.succ!
|
|
count += 1
|
|
})
|
|
assert_equal(1, count)
|
|
|
|
a = "a"
|
|
start = "a"
|
|
count = 0
|
|
assert_equal("a", a.upto("b", true) {|s|
|
|
assert_equal(start, s)
|
|
start.succ!
|
|
count += 1
|
|
})
|
|
assert_equal(1, count)
|
|
|
|
a = "0"
|
|
start = "0"
|
|
count = 0
|
|
assert_equal("0", a.upto("0") {|s|
|
|
assert_equal(start, s)
|
|
start.succ!
|
|
count += 1
|
|
})
|
|
assert_equal(1, count)
|
|
|
|
a = "0"
|
|
start = "0"
|
|
count = 0
|
|
assert_equal("0", a.upto("-1") {|s|
|
|
assert_equal(start, s)
|
|
start.succ!
|
|
count += 1
|
|
})
|
|
assert_equal(0, count)
|
|
|
|
a = "-1"
|
|
start = "-1"
|
|
count = 0
|
|
assert_equal("-1", a.upto("-2") {|s|
|
|
assert_equal(start, s)
|
|
start.succ!
|
|
count += 1
|
|
})
|
|
assert_equal(2, count)
|
|
|
|
assert_raise(TypeError) { "a".upto(:c) {} }
|
|
end
|
|
|
|
assert('String#ord') do
|
|
got = "hello!".split('').map {|x| x.ord}
|
|
expect = [104, 101, 108, 108, 111, 33]
|
|
unless UTF8STRING
|
|
got << "\xff".ord
|
|
expect << 0xff
|
|
end
|
|
assert_equal expect, got
|
|
end
|
|
|
|
assert('String#ord(UTF-8)') do
|
|
got = "こんにちは世界!".split('').map {|x| x.ord}
|
|
expect = [0x3053,0x3093,0x306b,0x3061,0x306f,0x4e16,0x754c,0x21]
|
|
assert_equal expect, got
|
|
end if UTF8STRING
|
|
|
|
assert('String#chr') do
|
|
assert_equal "a", "abcde".chr
|
|
assert_equal "h", "hello!".chr
|
|
assert_equal "", "".chr
|
|
end
|
|
|
|
assert('String#chr(UTF-8)') do
|
|
assert_equal "こ", "こんにちは世界!".chr
|
|
end if UTF8STRING
|
|
|
|
assert('String#chars') do
|
|
expect = ["h", "e", "l", "l", "o", "!"]
|
|
assert_equal expect, "hello!".chars
|
|
s = ""
|
|
"hello!".chars do |x|
|
|
s += x
|
|
end
|
|
assert_equal "hello!", s
|
|
end
|
|
|
|
assert('String#chars(UTF-8)') do
|
|
expect = ['こ', 'ん', 'に', 'ち', 'は', '世', '界', '!']
|
|
assert_equal expect, "こんにちは世界!".chars
|
|
s = ""
|
|
"こんにちは世界!".chars do |x|
|
|
s += x
|
|
end
|
|
assert_equal "こんにちは世界!", s
|
|
end if UTF8STRING
|
|
|
|
assert('String#each_char') do
|
|
chars = []
|
|
"hello!".each_char do |x|
|
|
chars << x
|
|
end
|
|
assert_equal ["h", "e", "l", "l", "o", "!"], chars
|
|
end
|
|
|
|
assert('String#each_char(UTF-8)') do
|
|
chars = []
|
|
"こんにちは世界!".each_char do |x|
|
|
chars << x
|
|
end
|
|
assert_equal ["こ", "ん", "に", "ち", "は", "世", "界", "!"], chars
|
|
end if UTF8STRING
|
|
|
|
assert('String#codepoints') do
|
|
expect = [104, 101, 108, 108, 111, 33]
|
|
assert_equal expect, "hello!".codepoints
|
|
cp = []
|
|
"hello!".codepoints do |x|
|
|
cp << x
|
|
end
|
|
assert_equal expect, cp
|
|
end
|
|
|
|
assert('String#codepoints(UTF-8)') do
|
|
expect = [12371, 12435, 12395, 12385, 12399, 19990, 30028, 33]
|
|
assert_equal expect, "こんにちは世界!".codepoints
|
|
cp = []
|
|
"こんにちは世界!".codepoints do |x|
|
|
cp << x
|
|
end
|
|
assert_equal expect, cp
|
|
end if UTF8STRING
|
|
|
|
assert('String#each_codepoint') do
|
|
expect = [104, 101, 108, 108, 111, 33]
|
|
cp = []
|
|
"hello!".each_codepoint do |x|
|
|
cp << x
|
|
end
|
|
assert_equal expect, cp
|
|
end
|
|
|
|
assert('String#each_codepoint(UTF-8)') do
|
|
expect = [12371, 12435, 12395, 12385, 12399, 19990, 30028, 33]
|
|
cp = []
|
|
"こんにちは世界!".each_codepoint do |x|
|
|
cp << x
|
|
end
|
|
assert_equal expect, cp
|
|
end if UTF8STRING
|
|
|
|
assert('String#delete_prefix') do
|
|
assert_equal "llo", "hello".delete_prefix("he")
|
|
assert_equal "hello", "hello".delete_prefix("llo")
|
|
assert_equal "llo", "hello".delete_prefix!("he")
|
|
assert_nil "hello".delete_prefix!("llo")
|
|
end
|
|
|
|
assert('String#delete_suffix') do
|
|
assert_equal "he", "hello".delete_suffix("llo")
|
|
assert_equal "hello", "hello".delete_suffix("he")
|
|
assert_equal "he", "hello".delete_suffix!("llo")
|
|
assert_nil "hello".delete_suffix!("he")
|
|
end
|
|
|
|
assert('String#+@') do
|
|
a = +"abc"
|
|
assert_false(a.frozen?)
|
|
a = +(a.freeze)
|
|
assert_false(a.frozen?)
|
|
end
|
|
|
|
assert('String#-@') do
|
|
a = -"abc"
|
|
assert_true(a.frozen?)
|
|
a = -(a.freeze)
|
|
assert_true(a.frozen?)
|
|
end
|