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test_memory_leak.rb
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test_memory_leak.rb
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require "helper"
class TestMemoryLeak < Nokogiri::TestCase
def setup
super
@str = <<EOF
<!DOCTYPE HTML>
<html>
<body>
<br />
</body>
</html>
EOF
end
if ENV['NOKOGIRI_GC'] # turning these off by default for now
def test_dont_hurt_em_why
content = File.open("#{File.dirname(__FILE__)}/files/dont_hurt_em_why.xml").read
ndoc = Nokogiri::XML(content)
2.times do
ndoc.search('status text').first.inner_text
ndoc.search('user name').first.inner_text
GC.start
end
end
class BadIO
def read(*args)
raise 'hell'
end
def write(*args)
raise 'chickens'
end
end
def test_for_mem_leak_on_io_callbacks
io = File.open SNUGGLES_FILE
Nokogiri::XML.parse(io)
loop do
Nokogiri::XML.parse(BadIO.new) rescue nil
doc.write BadIO.new rescue nil
end
end
def test_for_memory_leak
begin
# we don't use Dike in any tests, but requiring it has side effects
# that can create memory leaks, and that's what we're testing for.
require 'rubygems'
require 'dike' # do not remove!
count_start = count_object_space_documents
xml_data = <<-EOS
<test>
<items>
<item>abc</item>
<item>1234</item>
<item>Zzz</item>
<items>
</test>
EOS
20.times do
doc = Nokogiri::XML(xml_data)
doc.xpath("//item")
end
2.times { GC.start }
count_end = count_object_space_documents
assert((count_end - count_start) <= 2, "memory leak detected")
rescue LoadError
puts "\ndike is not installed, skipping memory leak test"
end
end
def test_node_set_namespace_mem_leak
xml = Nokogiri::XML "<foo></foo>"
ctx = Nokogiri::XML::XPathContext.new(xml)
loop do
ctx.evaluate("//namespace::*")
end
end
def test_leak_on_node_replace
loop do
doc = Nokogiri.XML("<root><foo /></root>")
n = Nokogiri::XML::CDATA.new(doc, "bar")
pivot = doc.root.children[0]
pivot.replace(n)
end
end
def test_sax_parser_context
io = StringIO.new(@str)
loop do
Nokogiri::XML::SAX::ParserContext.new(@str)
Nokogiri::XML::SAX::ParserContext.new(io)
io.rewind
Nokogiri::HTML::SAX::ParserContext.new(@str)
Nokogiri::HTML::SAX::ParserContext.new(io)
io.rewind
end
end
class JumpingSaxHandler < Nokogiri::XML::SAX::Document
def initialize(jumptag)
@jumptag = jumptag
super()
end
def start_element(name, attrs = [])
throw @jumptag
end
end
def test_jumping_sax_handler
doc = JumpingSaxHandler.new(:foo)
loop do
catch(:foo) do
Nokogiri::HTML::SAX::Parser.new(doc).parse(@str)
end
end
end
def test_in_context_parser_leak
loop do
doc = Nokogiri::XML::Document.new
fragment1 = Nokogiri::XML::DocumentFragment.new(doc, '<foo/>')
node = fragment1.children[0]
node.parse('<bar></bar>')
end
end
def test_in_context_parser_leak_ii
loop { Nokogiri::XML('<a/>').root.parse('<b/>') }
end
def test_leak_on_xpath_string_function
doc = Nokogiri::XML(@str)
loop do
doc.xpath('name(//node())')
end
end
end # if NOKOGIRI_GC
private
def count_object_space_documents
count = 0
ObjectSpace.each_object {|j| count += 1 if j.is_a?(Nokogiri::XML::Document) }
count
end
end