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# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
class Test_StringCStr < Test::Unit::TestCase
Bug4319 = '[ruby-dev:43094]'
def test_embed
s = Bug::String.new("abcdef")
s.set_len(3)
s.cstr_unterm('x')
assert_equal(0, s.cstr_term, Bug4319)
end
def test_long
s = Bug::String.new(Bug::String.new("abcdef")*100000)
s.cstr_unterm('x')
assert_equal(0, s.cstr_term, Bug4319)
end
def test_shared
s = Bug::String.new(Bug::String.new("abcdef")*5)
s = s.unterminated_substring(0, 29)
assert_equal(0, s.cstr_term, Bug4319)
end
def test_frozen
s0 = Bug::String.new("abcdefgh"*8)
[4, 4*3-1, 8*3-1, 64].each do |n|
s = Bug::String.new(s0[0, n])
s.cstr_unterm('x')
s.freeze
assert_equal(0, s.cstr_term)
WCHARS.each do |enc|
s = s0.encode(enc)
s.set_len(n - n % s[0].bytesize)
s.cstr_unterm('x')
s.freeze
assert_equal(0, s.cstr_term)
end
end
end
def test_rb_str_new_frozen_embed
# "rbconfi" is the smallest "maximum embeddable string". VWA adds
# a capacity field, which removes one pointer capacity for embedded objects,
# so if VWA is enabled, but there is only one size pool, then the
# maximum embeddable capacity on 32 bit machines is 8 bytes.
str = Bug::String.cstr_noembed("rbconfi")
str = Bug::String.rb_str_new_frozen(str)
assert_equal true, Bug::String.cstr_embedded?(str)
end
WCHARS = [Encoding::UTF_16BE, Encoding::UTF_16LE, Encoding::UTF_32BE, Encoding::UTF_32LE]
def test_wchar_embed
WCHARS.each do |enc|
s = Bug::String.new("\u{4022}a".encode(enc))
s.cstr_unterm('x')
assert_nothing_raised(ArgumentError) {s.cstr_term}
s.set_len(s.bytesize / 2)
assert_equal(1, s.size)
s.cstr_unterm('x')
assert_equal(0, s.cstr_term)
end
end
def test_wchar_long
str = "\u{4022}abcdef"
n = 100
len = str.size * n
WCHARS.each do |enc|
s = Bug::String.new(Bug::String.new(str.encode(enc))*n)
s.cstr_unterm('x')
assert_nothing_raised(ArgumentError, enc.name) {s.cstr_term}
s.set_len(s.bytesize / 2)
assert_equal(len / 2, s.size, enc.name)
s.cstr_unterm('x')
assert_equal(0, s.cstr_term, enc.name)
end
end
def test_wchar_lstrip!
assert_wchars_term_char(" a") {|s| s.lstrip!}
end
def test_wchar_rstrip!
assert_wchars_term_char("a ") {|s| s.rstrip!}
end
def test_wchar_chop!
assert_wchars_term_char("a\n") {|s| s.chop!}
end
def test_wchar_chomp!
assert_wchars_term_char("a\n") {|s| s.chomp!}
end
def test_wchar_aset
assert_wchars_term_char("a"*30) {|s| s[29,1] = ""}
end
def test_wchar_sub!
assert_wchars_term_char("foobar") {|s| s.sub!(/#{"foo".encode(s.encoding)}/, "")}
end
def test_wchar_delete!
assert_wchars_term_char("foobar") {|s| s.delete!("ao".encode(s.encoding))}
end
def test_wchar_squeeze!
assert_wchars_term_char("foo!") {|s| s.squeeze!}
end
def test_wchar_tr!
assert_wchars_term_char("\u{3042}foobar") {|s|
enc = s.encoding
s.tr!("\u{3042}".encode(enc), "c".encode(enc))
}
end
def test_wchar_tr_s!
assert_wchars_term_char("\u{3042}foobar") {|s|
enc = s.encoding
s.tr_s!("\u{3042}".encode(enc), "c".encode(enc))
}
end
def test_wchar_replace
assert_wchars_term_char("abc") {|s|
w = s.dup
s.replace("abcdefghijklmnop")
s.replace(w)
}
end
def test_embedded_from_heap
gh821 = "[GH-821]"
embedded_string = "abcdefghi"
string = embedded_string.gsub("efg", "123")
{}[string] = 1
non_terminated = "#{string}#{nil}"
assert_nil(Bug::String.cstr_term_char(non_terminated), gh821)
result = {}
WCHARS.map do |enc|
embedded_string = "ab".encode(enc)
string = embedded_string.gsub("b".encode(enc), "1".encode(enc))
{}[string] = 1
non_terminated = "#{string}#{nil}"
c = Bug::String.cstr_term_char(non_terminated)
result[enc] = c if c
end
assert_empty(result, gh821)
end
def assert_wchars_term_char(str)
result = {}
WCHARS.map do |enc|
s = Bug::String.new(str.encode(enc))
yield s
c = s.cstr_term_char
result[enc] = c if c
end
assert_empty(result)
end
end
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