1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
# frozen_string_literal: true
require "helper"
class TestCssCacheAccess < Nokogiri::TestCase
def setup
super
@css = "a1 > b2 > c3"
Nokogiri::CSS::Parser.clear_cache
Nokogiri::CSS::Parser.class_eval do
class << @cache
alias_method :old_bracket, :[]
def access_count
@access_count ||= 0
end
def [](key)
@access_count ||= 0
@access_count += 1
old_bracket(key)
end
end
end
assert_predicate(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::XPathVisitor.new)
Nokogiri::CSS::Parser.new.xpath_for(@css, "//", Nokogiri::CSS::XPathVisitor.new)
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_empty(cache)
Nokogiri::CSS.xpath_for(css)
refute_empty(cache)
key = cache.keys.first
cache[key] = "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_empty(cache)
Nokogiri::CSS.xpath_for(css)
assert_empty(cache)
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_empty(cache)
Nokogiri::CSS::Parser.without_cache do
Nokogiri::CSS.xpath_for(css)
end
assert_empty(cache)
end
def test_without_cache_resets_cache_value
Nokogiri::CSS::Parser.set_cache(true)
Nokogiri::CSS::Parser.without_cache do
refute_predicate(Nokogiri::CSS::Parser, :cache_on?)
end
assert_predicate(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_predicate(Nokogiri::CSS::Parser, :cache_on?)
end
def test_cache_key_on_ns_prefix_and_visitor_config
Nokogiri::CSS::Parser.clear_cache
Nokogiri::CSS::Parser.set_cache(true)
cache = Nokogiri::CSS::Parser.instance_variable_get("@cache")
assert_empty(cache)
Nokogiri::CSS.xpath_for("foo")
Nokogiri::CSS.xpath_for("foo", prefix: ".//")
Nokogiri::CSS.xpath_for("foo", prefix: ".//", ns: { "example" => "http://example.com/" })
Nokogiri::CSS.xpath_for("foo", prefix: ".//", ns: { "example" => "http://example.com/" },
visitor: Nokogiri::CSS::XPathVisitor.new(builtins: Nokogiri::CSS::XPathVisitor::BuiltinsConfig::ALWAYS))
Nokogiri::CSS.xpath_for("foo", prefix: ".//", ns: { "example" => "http://example.com/" },
visitor: Nokogiri::CSS::XPathVisitor.new(builtins: Nokogiri::CSS::XPathVisitor::BuiltinsConfig::ALWAYS,
doctype: Nokogiri::CSS::XPathVisitor::DoctypeConfig::HTML5))
assert_equal(5, cache.length)
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_predicate(Nokogiri::CSS::Parser, :cache_on?)
end
end
|
