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# frozen_string_literal: true
require_relative "common"
describe "Sanitize" do
describe "initializer" do
it "should not modify a transformers array in the given config" do
transformers = [
lambda {}
]
Sanitize.new({transformers: transformers})
_(transformers.length).must_equal(1)
end
end
describe "instance methods" do
before do
@s = Sanitize.new
end
describe "#document" do
before do
@s = Sanitize.new(elements: ["html"])
end
it "should sanitize an HTML document" do
_(@s.document('<!doctype html><html><b>Lo<!-- comment -->rem</b> <a href="pants" title="foo">ipsum</a> <a href="http://foo.com/"><strong>dolor</strong></a> sit<br/>amet <script>alert("hello world");</script></html>'))
.must_equal "<html>Lorem ipsum dolor sit amet </html>"
end
it "should not modify the input string" do
input = "<!DOCTYPE html><b>foo</b>"
@s.document(input)
_(input).must_equal("<!DOCTYPE html><b>foo</b>")
end
it "should not choke on frozen documents" do
_(@s.document("<!doctype html><html><b>foo</b>")).must_equal "<html>foo</html>"
end
it "should normalize newlines" do
_(@s.document("a\r\n\n\r\r\r\nz")).must_equal "<html>a\n\n\n\n\nz</html>"
end
it "should strip control characters (except ASCII whitespace)" do
sample_control_chars = "\u0001\u0008\u000b\u000e\u001f\u007f\u009f"
whitespace = "\t\n\f\u0020"
_(@s.document("a#{sample_control_chars}#{whitespace}z")).must_equal "<html>a#{whitespace}z</html>"
end
it "should strip non-characters" do
sample_non_chars = "\ufdd0\ufdef\ufffe\uffff\u{1fffe}\u{1ffff}\u{2fffe}\u{2ffff}\u{3fffe}\u{3ffff}\u{4fffe}\u{4ffff}\u{5fffe}\u{5ffff}\u{6fffe}\u{6ffff}\u{7fffe}\u{7ffff}\u{8fffe}\u{8ffff}\u{9fffe}\u{9ffff}\u{afffe}\u{affff}\u{bfffe}\u{bffff}\u{cfffe}\u{cffff}\u{dfffe}\u{dffff}\u{efffe}\u{effff}\u{ffffe}\u{fffff}\u{10fffe}\u{10ffff}"
_(@s.document("a#{sample_non_chars}z")).must_equal "<html>az</html>"
end
describe "when html body exceeds Nokogiri::Gumbo::DEFAULT_MAX_TREE_DEPTH" do
let(:content) do
content = nest_html_content("<b>foo</b>", Nokogiri::Gumbo::DEFAULT_MAX_TREE_DEPTH)
"<html>#{content}</html>"
end
it "raises an ArgumentError exception" do
assert_raises ArgumentError do
@s.document(content)
end
end
describe "and :max_tree_depth of -1 is supplied in :parser_options" do
before do
@s = Sanitize.new(elements: ["html"], parser_options: {max_tree_depth: -1})
end
it "does not raise an ArgumentError exception" do
_(@s.document(content)).must_equal "<html>foo</html>"
end
end
end
end
describe "#fragment" do
it "should sanitize an HTML fragment" do
_(@s.fragment('<b>Lo<!-- comment -->rem</b> <a href="pants" title="foo">ipsum</a> <a href="http://foo.com/"><strong>dolor</strong></a> sit<br/>amet <script>alert("hello world");</script>'))
.must_equal "Lorem ipsum dolor sit amet "
end
it "should not modify the input string" do
input = "<b>foo</b>"
@s.fragment(input)
_(input).must_equal "<b>foo</b>"
end
it "should not choke on fragments containing <html> or <body>" do
_(@s.fragment("<html><b>foo</b></html>")).must_equal "foo"
_(@s.fragment("<body><b>foo</b></body>")).must_equal "foo"
_(@s.fragment("<html><body><b>foo</b></body></html>")).must_equal "foo"
_(@s.fragment("<!DOCTYPE html><html><body><b>foo</b></body></html>")).must_equal "foo"
end
it "should not choke on frozen fragments" do
_(@s.fragment("<b>foo</b>")).must_equal "foo"
end
it "should normalize newlines" do
_(@s.fragment("a\r\n\n\r\r\r\nz")).must_equal "a\n\n\n\n\nz"
end
it "should strip control characters (except ASCII whitespace)" do
sample_control_chars = "\u0001\u0008\u000b\u000e\u001f\u007f\u009f"
whitespace = "\t\n\f\u0020"
_(@s.fragment("a#{sample_control_chars}#{whitespace}z")).must_equal "a#{whitespace}z"
end
it "should strip non-characters" do
sample_non_chars = "\ufdd0\ufdef\ufffe\uffff\u{1fffe}\u{1ffff}\u{2fffe}\u{2ffff}\u{3fffe}\u{3ffff}\u{4fffe}\u{4ffff}\u{5fffe}\u{5ffff}\u{6fffe}\u{6ffff}\u{7fffe}\u{7ffff}\u{8fffe}\u{8ffff}\u{9fffe}\u{9ffff}\u{afffe}\u{affff}\u{bfffe}\u{bffff}\u{cfffe}\u{cffff}\u{dfffe}\u{dffff}\u{efffe}\u{effff}\u{ffffe}\u{fffff}\u{10fffe}\u{10ffff}"
_(@s.fragment("a#{sample_non_chars}z")).must_equal "az"
end
describe "when html body exceeds Nokogiri::Gumbo::DEFAULT_MAX_TREE_DEPTH" do
let(:content) do
content = nest_html_content("<b>foo</b>", Nokogiri::Gumbo::DEFAULT_MAX_TREE_DEPTH)
"<body>#{content}</body>"
end
it "raises an ArgumentError exception" do
assert_raises ArgumentError do
@s.fragment(content)
end
end
describe "and :max_tree_depth of -1 is supplied in :parser_options" do
before do
@s = Sanitize.new(parser_options: {max_tree_depth: -1})
end
it "does not raise an ArgumentError exception" do
_(@s.fragment(content)).must_equal "foo"
end
end
end
end
describe "#node!" do
it "should sanitize a Nokogiri::XML::Node" do
doc = Nokogiri::HTML5.parse('<b>Lo<!-- comment -->rem</b> <a href="pants" title="foo">ipsum</a> <a href="http://foo.com/"><strong>dolor</strong></a> sit<br/>amet <script>alert("hello world");</script>')
frag = doc.fragment
doc.xpath("/html/body/node()").each { |node| frag << node }
@s.node!(frag)
_(frag.to_html).must_equal "Lorem ipsum dolor sit amet "
end
describe "when the given node is a document and <html> isn't allowlisted" do
it "should raise a Sanitize::Error" do
doc = Nokogiri::HTML5.parse("foo")
_(proc { @s.node!(doc) }).must_raise Sanitize::Error
end
end
end
end
describe "class methods" do
describe ".document" do
it "should sanitize an HTML document with the given config" do
html = '<!doctype html><html><b>Lo<!-- comment -->rem</b> <a href="pants" title="foo">ipsum</a> <a href="http://foo.com/"><strong>dolor</strong></a> sit<br/>amet <script>alert("hello world");</script></html>'
_(Sanitize.document(html, elements: ["html"]))
.must_equal "<html>Lorem ipsum dolor sit amet </html>"
end
end
describe ".fragment" do
it "should sanitize an HTML fragment with the given config" do
html = '<b>Lo<!-- comment -->rem</b> <a href="pants" title="foo">ipsum</a> <a href="http://foo.com/"><strong>dolor</strong></a> sit<br/>amet <script>alert("hello world");</script>'
_(Sanitize.fragment(html, elements: ["strong"]))
.must_equal "Lorem ipsum <strong>dolor</strong> sit amet "
end
end
describe ".node!" do
it "should sanitize a Nokogiri::XML::Node with the given config" do
doc = Nokogiri::HTML5.parse('<b>Lo<!-- comment -->rem</b> <a href="pants" title="foo">ipsum</a> <a href="http://foo.com/"><strong>dolor</strong></a> sit<br/>amet <script>alert("hello world");</script>')
frag = doc.fragment
doc.xpath("/html/body/node()").each { |node| frag << node }
Sanitize.node!(frag, elements: ["strong"])
_(frag.to_html).must_equal "Lorem ipsum <strong>dolor</strong> sit amet "
end
end
end
private
def nest_html_content(html_content, depth)
"#{"<span>" * depth}#{html_content}#{"</span>" * depth}"
end
end
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