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require "helper"
class TestCssCacheAccess < Nokogiri::TestCase
def setup
super
@css = "a1 > b2 > c3"
@parse_result = Nokogiri::CSS.parse(@css)
@to_xpath_result = @parse_result.map(&:to_xpath)
Nokogiri::CSS::Parser.clear_cache
Nokogiri::CSS::Parser.class_eval do
class << @cache
alias :old_bracket :[]
def access_count
@access_count ||= 0
end
def [](key)
@access_count ||= 0
@access_count += 1
old_bracket(key)
end
end
end
assert Nokogiri::CSS::Parser.cache_on?
end
def teardown
Nokogiri::CSS::Parser.clear_cache(true)
Nokogiri::CSS::Parser.set_cache true
super
end
[false, true].each do |cache_setting|
define_method "test_css_cache_#{cache_setting ? "true" : "false"}" do
Nokogiri::CSS::Parser.set_cache cache_setting
Nokogiri::CSS.xpath_for(@css)
Nokogiri::CSS.xpath_for(@css)
Nokogiri::CSS::Parser.new.xpath_for(@css)
Nokogiri::CSS::Parser.new.xpath_for(@css)
if cache_setting
assert_equal(1, Nokogiri::CSS::Parser.class_eval { @cache.count })
assert_equal(4, Nokogiri::CSS::Parser.class_eval { @cache.access_count })
else
assert_equal(0, Nokogiri::CSS::Parser.class_eval { @cache.count })
assert_equal(0, Nokogiri::CSS::Parser.class_eval { @cache.access_count })
end
end
end
end
class TestCssCache < Nokogiri::TestCase
def teardown
Nokogiri::CSS::Parser.set_cache true
super
end
def test_enabled_cache_is_used
Nokogiri::CSS::Parser.clear_cache
Nokogiri::CSS::Parser.set_cache true
css = ".foo .bar .baz"
cache = Nokogiri::CSS::Parser.instance_variable_get("@cache")
assert_nil cache[css]
Nokogiri::CSS.xpath_for(css)
assert cache[css]
cache[css] = "this is an injected value"
assert_equal "this is an injected value", Nokogiri::CSS.xpath_for(css)
end
def test_disabled_cache_is_not_used
Nokogiri::CSS::Parser.clear_cache
Nokogiri::CSS::Parser.set_cache false
css = ".foo .bar .baz"
cache = Nokogiri::CSS::Parser.instance_variable_get("@cache")
assert_nil cache[css]
Nokogiri::CSS.xpath_for(css)
assert_nil cache[css]
end
def test_without_cache_avoids_cache
Nokogiri::CSS::Parser.clear_cache
Nokogiri::CSS::Parser.set_cache true
css = ".foo .bar .baz"
cache = Nokogiri::CSS::Parser.instance_variable_get("@cache")
assert_nil cache[css]
Nokogiri::CSS::Parser.without_cache do
Nokogiri::CSS.xpath_for(css)
end
assert_nil cache[css]
end
def test_without_cache_resets_cache_value
Nokogiri::CSS::Parser.set_cache true
Nokogiri::CSS::Parser.without_cache do
assert !Nokogiri::CSS::Parser.cache_on?
end
assert Nokogiri::CSS::Parser.cache_on?
end
def test_without_cache_resets_cache_value_even_after_exception
Nokogiri::CSS::Parser.set_cache true
assert_raises(RuntimeError) do
Nokogiri::CSS::Parser.without_cache do
raise RuntimeError
end
end
assert Nokogiri::CSS::Parser.cache_on?
end
def test_race_condition
# https://github.com/sparklemotion/nokogiri/issues/1935
threads = []
Nokogiri::CSS::Parser.set_cache true
threads << Thread.new do
Nokogiri::CSS::Parser.without_cache do
sleep 0.02
end
end
threads << Thread.new do
sleep 0.01
Nokogiri::CSS::Parser.without_cache do
sleep 0.02
end
end
threads.each(&:join)
assert Nokogiri::CSS::Parser.cache_on?
end
end
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