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* io.c (io_setstrbuf): return true if the buffer is newly created. * io.c (io_set_read_length): shrink the read buffer if it is a new object and is too large. [ruby-core:81370] [Bug #13597] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59701 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
40 lines
1 KiB
Ruby
40 lines
1 KiB
Ruby
# frozen_string_literal: true
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require 'test/unit'
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require '-test-/string'
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require 'rbconfig/sizeof'
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class Test_StringCapacity < Test::Unit::TestCase
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def capa(str)
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Bug::String.capacity(str)
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end
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def test_capacity_embeded
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size = RbConfig::SIZEOF['void*'] * 3 - 1
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assert_equal size, capa('foo')
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end
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def test_capacity_shared
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assert_equal 0, capa(:abcdefghijklmnopqrstuvwxyz.to_s)
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end
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def test_capacity_normal
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assert_equal 128, capa('1'*128)
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end
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def test_s_new_capacity
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assert_equal("", String.new(capacity: 1000))
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assert_equal(String, String.new(capacity: 1000).class)
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assert_equal(10000, capa(String.new(capacity: 10000)))
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assert_equal("", String.new(capacity: -1000))
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assert_equal(capa(String.new(capacity: -10000)), capa(String.new(capacity: -1000)))
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end
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def test_io_read
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s = String.new(capacity: 1000)
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open(__FILE__) {|f|f.read(1024*1024, s)}
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assert_equal(1024*1024, capa(s))
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open(__FILE__) {|f|s = f.read(1024*1024)}
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assert_operator(capa(s), :<=, s.bytesize+4096)
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end
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end
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