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59 lines
1.5 KiB
Ruby
59 lines
1.5 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_embedded
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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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def test_literal_capacity
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s = "I am testing string literal capacity"
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assert_equal(s.length, capa(s))
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end
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def test_capacity_frozen
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s = String.new("I am testing", capacity: 1000)
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s << "fstring capacity"
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s.freeze
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assert_equal(s.length, capa(s))
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end
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def test_capacity_fstring
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s = String.new("I am testing", capacity: 1000)
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s << "fstring capacity"
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s = -s
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assert_equal(s.length, capa(s))
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end
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end
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