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xml_parser_unittest.cc
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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include "base/bind.h"
#include "base/json/json_reader.h"
#include "services/data_decoder/xml_parser.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "base/files/file_util.h"
namespace data_decoder {
namespace {
void TestParseXmlCallback(std::unique_ptr<base::Value>* value_out,
base::Optional<std::string>* error_out,
base::Optional<base::Value> value,
const base::Optional<std::string>& error) {
std::unique_ptr<base::Value> value_ptr =
value ? base::Value::ToUniquePtrValue(std::move(value.value())) : nullptr;
*value_out = std::move(value_ptr);
*error_out = error;
}
// Parses the passed in |xml| and compares the result to |json|.
// If |json| is empty, the parsing is expected to fail.
void TestParseXml(const std::string& xml, const std::string& json) {
XmlParser parser_impl;
// Use a reference to mojom::XmlParser as XmlParser implements the interface
// privately.
mojom::XmlParser& parser = parser_impl;
std::unique_ptr<base::Value> actual_value;
base::Optional<std::string> error;
parser.Parse(xml, base::Bind(&TestParseXmlCallback, &actual_value, &error));
if (json.empty()) {
EXPECT_TRUE(error);
EXPECT_FALSE(actual_value)
<< "Unexpected success, value: " << *actual_value;
return;
}
EXPECT_FALSE(error) << "Unexpected error: " << *error;
EXPECT_TRUE(actual_value);
std::unique_ptr<base::Value> expected_value =
base::JSONReader::ReadDeprecated(json);
DCHECK(expected_value) << "Bad test, incorrect JSON: " << json;
EXPECT_EQ(*expected_value, *actual_value);
}
} // namespace
using XmlParserTest = testing::Test;
TEST_F(XmlParserTest, ParseBadXml) {
std::string invalid_xml_strings[] = {"",
" ",
"Awesome possum",
R"( ["json", "or", "xml?"] )",
"<unbalanced>",
"<hello>bad tag</goodbye>"};
for (auto& xml : invalid_xml_strings)
TestParseXml(xml, "");
}
TEST_F(XmlParserTest, IgnoreComments) {
TestParseXml("<!-- This is the best XML document IN THE WORLD! --><a></a>",
R"( {"type": "element", "tag": "a"} )");
}
TEST_F(XmlParserTest, IgnoreProcessingCommands) {
TestParseXml(R"(<?xml-stylesheet href="mystyle.css" type="text/css"?>
<a></a>)",
R"( {"type": "element", "tag": "a"} )");
TestParseXml("<a/><?hello?>", R"( {"type": "element", "tag": "a"} )");
}
TEST_F(XmlParserTest, IgnoreDocumentTypes) {
TestParseXml(
R"(<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">Some HTML</html>
)",
R"( {"type": "element",
"namespaces": {"": "http://www.w3.org/1999/xhtml"},
"tag": "html",
"children":[{"type": "text", "text": "Some HTML"}]
}
)");
}
TEST_F(XmlParserTest, ParseSelfClosingTag) {
TestParseXml("<a/>", R"( {"type": "element", "tag": "a"} )");
TestParseXml("<a><b/></a>",
R"( {"type": "element",
"tag": "a",
"children": [{"type": "element", "tag": "b"}]} )");
TestParseXml("<a><b/><b/><b/></a>",
R"( {"type": "element",
"tag": "a",
"children":[
{"type": "element", "tag": "b"},
{"type": "element", "tag": "b"},
{"type": "element", "tag": "b"}
]}
)");
}
TEST_F(XmlParserTest, ParseEmptyTag) {
TestParseXml("<a></a>", R"( {"type": "element", "tag": "a"} )");
TestParseXml("<a><b></b></a>",
R"( {"type": "element",
"tag": "a",
"children": [{"type": "element", "tag": "b"}]} )");
TestParseXml("<a><b></b><b></b></a>",
R"( {"type": "element",
"tag": "a",
"children":[{"type": "element", "tag": "b"},
{"type": "element", "tag": "b"}]} )");
}
TEST_F(XmlParserTest, ParseBadTag) {
// Parse a tag with an invalid character.
TestParseXml("<hello\xD8\x00>bonjour</hello\xD8\x00>", "");
TestParseXml("<hello\xc0\x8a>bonjour</hello\xc0\x8a>", "");
}
TEST_F(XmlParserTest, ParseTextElement) {
TestParseXml("<hello>bonjour</hello>",
R"( {"type": "element",
"tag": "hello",
"children": [{"type": "text", "text": "bonjour"}]} )");
}
TEST_F(XmlParserTest, ParseBadTextElement) {
TestParseXml("<hello>\xed\xa0\x80\xed\xbf\xbf></hello>", "");
TestParseXml("<hello>\xc0\x8a</hello>", "");
}
TEST_F(XmlParserTest, ParseCDataElement) {
TestParseXml(R"(<hello><![CDATA[This is CData.
With weird chars [ ] { } <> ; : ' " and
some <b>formatting</b> <br>]]>
</hello> )",
R"( {"type": "element",
"tag": "hello",
"children": [{"type": "cdata",
"text": "This is CData.\n With weird chars [ ] { } <> ; : ' \" and\n some <b>formatting</b> <br>"
}]} )");
}
TEST_F(XmlParserTest, ParseBadCDataElement) {
// Missing first bracket.
TestParseXml("<hello><!CDATA[This is CData.]]></hello>", "");
// Space before last bracket.
TestParseXml("<hello><![CDATA[This is CData.] ]></hello>", "");
// Space before closing >.
TestParseXml("<hello><![CDATA[This is CData.]] ></hello>", "");
// Invalid UTF-8.
TestParseXml("<a><![CDATA[\xc0\x8a]]><d>", "");
TestParseXml("<hello><![CDATA[\xed\xa0\x80\xed\xbf\xbf]]></hello>", "");
}
TEST_F(XmlParserTest, ParseTextWithEntities) {
TestParseXml("<hello>"bonjour& ' <hello></hello>",
R"( {"type": "element",
"tag": "hello",
"children": [{"type": "text",
"text": "\"bonjour& ' <hello>"}]} )");
// Parse invalid UTF8 entities.
TestParseXml("<hello>�</hello>", "");
// Entities in CDATA are not evaluated.
TestParseXml("<hello><![CDATA["bonjour& ']]></hello>",
R"( {"type": "element",
"tag": "hello",
"children": [{"type": "cdata",
"text": ""bonjour& '"}]} )");
}
TEST_F(XmlParserTest, ParseMultipleSimilarTextElement) {
TestParseXml("<hello><fr>bonjour</fr><fr>salut</fr><fr>coucou</fr></hello>",
R"( {"type": "element",
"tag": "hello",
"children": [
{"type": "element",
"tag": "fr",
"children": [{"type": "text", "text": "bonjour"}]},
{"type": "element",
"tag": "fr",
"children": [{"type": "text", "text": "salut"}]},
{"type": "element",
"tag": "fr",
"children": [{"type": "text", "text": "coucou"}]}
]} )");
}
TEST_F(XmlParserTest, ParseMixMatchTextNonTextElement) {
TestParseXml(
R"(
<hello>
<fr>coucou</fr>
<fr><proper>bonjour</proper><slang>salut</slang></fr>
<fr>ca va</fr>
</hello> )",
R"(
{"type": "element",
"tag": "hello",
"children": [
{"type": "element",
"tag": "fr",
"children": [{"type": "text", "text": "coucou"}]},
{"type": "element",
"tag": "fr",
"children": [
{"type": "element",
"tag": "proper",
"children": [{"type": "text", "text": "bonjour" }]},
{"type": "element",
"tag": "slang",
"children": [{"type": "text", "text": "salut" }]}
]},
{"type": "element",
"tag": "fr",
"children": [{"type": "text", "text": "ca va"}]}
]} )");
}
TEST_F(XmlParserTest, ParseElementsInText) {
TestParseXml(
"<p>This is <b>some</b> text.<![CDATA[ this <i>formatting</i> is ignored"
" ]]></p>",
R"(
{"type": "element", "tag": "p", "children": [
{"type": "text", "text": "This is "},
{"type": "element", "tag": "b", "children": [
{"type": "text", "text": "some"}
]},
{"type": "text", "text": " text."},
{"type": "cdata", "text": " this <i>formatting</i> is ignored "}
]} )");
}
TEST_F(XmlParserTest, ParseNestedXml) {
TestParseXml(
R"( <M><a><t><r><y><o><s><h><k><a>Zdravstvuy</a>
</k></h></s></o></y></r></t></a></M> )",
R"( {"type": "element", "tag": "M", "children": [
{"type": "element", "tag": "a", "children": [
{"type": "element", "tag": "t", "children": [
{"type": "element", "tag": "r", "children": [
{"type": "element", "tag": "y", "children": [
{"type": "element", "tag": "o", "children": [
{"type": "element", "tag": "s", "children": [
{"type": "element", "tag": "h", "children": [
{"type": "element", "tag": "k", "children": [
{"type": "element", "tag": "a", "children": [
{"type": "text", "text": "Zdravstvuy"}
]}
]}
]}
]}
]}
]}
]}
]}
]}
]} )");
}
TEST_F(XmlParserTest, ParseMultipleSimilarElements) {
TestParseXml("<a><b>b1</b><c>c1</c><b>b2</b><c>c2</c><b>b3</b><c>c3</c></a>",
R"( {"type": "element", "tag": "a", "children": [
{"type": "element", "tag": "b", "children":[
{"type": "text", "text": "b1"}]},
{"type": "element", "tag": "c", "children":[
{"type": "text", "text": "c1"}]},
{"type": "element", "tag": "b", "children":[
{"type": "text", "text": "b2"}]},
{"type": "element", "tag": "c", "children":[
{"type": "text", "text": "c2"}]},
{"type": "element", "tag": "b", "children":[
{"type": "text", "text": "b3"}]},
{"type": "element", "tag": "c", "children":[
{"type": "text", "text": "c3"}]}
]} )");
}
TEST_F(XmlParserTest, LargeNumber) {
TestParseXml("<number>18446744073709551616</number>",
R"( {"type": "element",
"tag": "number",
"children": [
{ "type": "text", "text": "18446744073709551616"}
]} )");
}
TEST_F(XmlParserTest, JsonInjection) {
TestParseXml(
R"( <test>{"tag": "woop", "boing": 123, 12: ""foodyums"}</test> )",
R"( {"type": "element",
"tag": "test",
"children": [
{"type": "text",
"text": "{\"tag\": \"woop\", \"boing\": 123, 12: \"\"foodyums\"}"}
]}
)");
}
TEST_F(XmlParserTest, ParseAttributes) {
TestParseXml("<a b='c'/>",
R"( {"type": "element",
"tag": "a",
"attributes": {"b": "c"}} )");
// Duplicate attributes are considered an error by libxml.
TestParseXml("<a b='c' b='d'/>", "");
TestParseXml("<a><b c='d'/></a>",
R"( {"type": "element",
"tag": "a",
"children": [
{"type": "element", "tag": "b",
"attributes":{"c": "d"}}]} )");
TestParseXml("<hello lang='fr'>bonjour</hello>",
R"( {"type": "element", "tag": "hello",
"attributes": {"lang": "fr"},
"children": [{"type": "text", "text": "bonjour"}]
} )");
TestParseXml(
"<translate lang='fr' id='123'><hello>bonjour</hello></translate>",
R"( {"type": "element",
"tag": "translate",
"attributes": {"lang": "fr", "id": "123"},
"children": [
{"type": "element", "tag": "hello",
"children": [{"type": "text", "text": "bonjour"}]
}
]}
)");
}
TEST_F(XmlParserTest, ParseBadAttributes) {
// Key with invalid UTF8.
TestParseXml("<a b\xc0\x8a='c'/>", "");
// Value with invalid UTF8.
TestParseXml("<a b='c\xc0\x8a'/>", "");
}
TEST_F(XmlParserTest, MultipleNamespacesDefined) {
TestParseXml(
"<a xmlns='http://a' xmlns:foo='http://foo' xmlns:bar='http://bar'></a>",
R"( {"type": "element",
"tag": "a",
"namespaces":{
"": "http://a",
"foo": "http://foo",
"bar": "http://bar"
}} )");
}
TEST_F(XmlParserTest, NamespacesUsed) {
TestParseXml(
"<foo:a xmlns:foo='http://foo'>"
" <foo:b att1='fooless' foo:att2='fooful'>With foo</foo:b>"
" <b foo:att1='fooful' att2='fooless'>No foo</b>"
"</foo:a>",
R"(
{"type": "element",
"tag": "foo:a",
"namespaces": {"foo": "http://foo"},
"children": [
{"type": "element",
"tag": "foo:b",
"attributes": {"att1": "fooless", "foo:att2": "fooful"},
"children": [{"type": "text", "text": "With foo"}]
},
{"type": "element",
"tag": "b",
"attributes": {"foo:att1": "fooful", "att2": "fooless"},
"children": [{"type": "text", "text": "No foo"}]
}
]
} )");
}
TEST_F(XmlParserTest, ParseTypicalXml) {
constexpr char kXml[] = R"(<?xml version='1.0' encoding='UTF-8'?>
<!-- This is an XML sample -->
<library xmlns='http://library' xmlns:foo='http://foo.com'>
<book foo:id="k123">
<author>Isaac Newton</author>
<title>Philosophiae Naturalis Principia Mathematica</title>
<genre>Science</genre>
<price>40.95</price>
<publish_date>1947-9-03</publish_date>
</book>
<book foo:id="k456">
<author>Dr. Seuss</author>
<title>Green Eggs and Ham</title>
<genre>Kid</genre>
<foo:kids/>
<price>4.95</price>
<publish_date>1960-8-12</publish_date>
</book>
</library>
)";
constexpr char kJson[] = R"(
{"type": "element",
"tag": "library",
"namespaces": {
"": "http://library",
"foo": "http://foo.com"
},
"children": [
{"type": "element",
"tag": "book",
"attributes": {"foo:id": "k123"},
"children": [
{"type": "element",
"tag": "author",
"children": [{"type": "text", "text": "Isaac Newton"}]
},
{"type": "element",
"tag": "title",
"children": [
{"type": "text",
"text": "Philosophiae Naturalis Principia Mathematica"}
]
},
{"type": "element",
"tag": "genre",
"children": [{"type": "text", "text": "Science"}]
},
{"type": "element",
"tag": "price",
"children": [{"type": "text", "text": "40.95"}]
},
{"type": "element",
"tag": "publish_date",
"children": [{"type": "text", "text": "1947-9-03"}]
}
]
},
{"type": "element",
"tag": "book",
"attributes": {"foo:id": "k456"},
"children": [
{"type": "element",
"tag": "author",
"children": [{"type": "text", "text": "Dr. Seuss"}]
},
{"type": "element",
"tag": "title",
"children": [{"type": "text", "text": "Green Eggs and Ham"}]
},
{"type": "element",
"tag": "genre",
"children": [{"type": "text", "text": "Kid"}]
},
{"type": "element",
"tag": "foo:kids"
},
{"type": "element",
"tag": "price",
"children": [{"type": "text", "text": "4.95"}]
},
{"type": "element",
"tag": "publish_date",
"children": [{"type": "text", "text": "1960-8-12"}]
}
]}
]
}
)";
TestParseXml(kXml, kJson);
}
} // namespace data_decoder