mirror of
https://github.com/ruby/ruby.git
synced 2025-08-25 05:55:46 +02:00
7577c101ed
* Unify length field for embedded and heap strings The length field is of the same type and position in RString for both embedded and heap allocated strings, so we can unify it. * Remove RSTRING_EMBED_LEN
75 lines
2 KiB
Ruby
75 lines
2 KiB
Ruby
# frozen_string_literal: true
|
|
require 'test/unit'
|
|
require '-test-/string'
|
|
require 'rbconfig/sizeof'
|
|
|
|
class Test_StringCapacity < Test::Unit::TestCase
|
|
def test_capacity_embedded
|
|
assert_equal GC::INTERNAL_CONSTANTS[:BASE_SLOT_SIZE] - embed_header_size - 1, capa('foo')
|
|
assert_equal max_embed_len, capa('1' * max_embed_len)
|
|
assert_equal max_embed_len, capa('1' * (max_embed_len - 1))
|
|
end
|
|
|
|
def test_capacity_shared
|
|
sym = ("a" * GC::INTERNAL_CONSTANTS[:BASE_SLOT_SIZE]).to_sym
|
|
assert_equal 0, capa(sym.to_s)
|
|
end
|
|
|
|
def test_capacity_normal
|
|
assert_equal max_embed_len + 1, capa('1' * (max_embed_len + 1))
|
|
assert_equal max_embed_len + 100, capa('1' * (max_embed_len + 100))
|
|
end
|
|
|
|
def test_s_new_capacity
|
|
assert_equal("", String.new(capacity: 1000))
|
|
assert_equal(String, String.new(capacity: 1000).class)
|
|
assert_equal(10000, capa(String.new(capacity: 10000)))
|
|
|
|
assert_equal("", String.new(capacity: -1000))
|
|
assert_equal(capa(String.new(capacity: -10000)), capa(String.new(capacity: -1000)))
|
|
end
|
|
|
|
def test_io_read
|
|
s = String.new(capacity: 1000)
|
|
open(__FILE__) {|f|f.read(1024*1024, s)}
|
|
assert_equal(1024*1024, capa(s))
|
|
open(__FILE__) {|f|s = f.read(1024*1024)}
|
|
assert_operator(capa(s), :<=, s.bytesize+4096)
|
|
end
|
|
|
|
def test_literal_capacity
|
|
s = eval(%{
|
|
# frozen_string_literal: true
|
|
"#{"a" * (max_embed_len + 1)}"
|
|
})
|
|
assert_equal(s.length, capa(s))
|
|
end
|
|
|
|
def test_capacity_frozen
|
|
s = String.new("I am testing", capacity: 1000)
|
|
s << "a" * GC::INTERNAL_CONSTANTS[:BASE_SLOT_SIZE]
|
|
s.freeze
|
|
assert_equal(s.length, capa(s))
|
|
end
|
|
|
|
def test_capacity_fstring
|
|
s = String.new("a" * max_embed_len, capacity: max_embed_len * 3)
|
|
s << "fstring capacity"
|
|
s = -s
|
|
assert_equal(s.length, capa(s))
|
|
end
|
|
|
|
private
|
|
|
|
def capa(str)
|
|
Bug::String.capacity(str)
|
|
end
|
|
|
|
def embed_header_size
|
|
3 * RbConfig::SIZEOF['void*']
|
|
end
|
|
|
|
def max_embed_len
|
|
GC::INTERNAL_CONSTANTS[:RVARGC_MAX_ALLOCATE_SIZE] - embed_header_size - 1
|
|
end
|
|
end
|