Use Catch for our test suite

`make check` is also added to compile and run the tests
Catch is fetched with cmake automatically into the build directory when needed

tests/colors.cpp

@@ -0,0 +1,54 @@
+#include "catch.hpp"
+
+#include <bridge/colors.hpp>
+#include <xmpp/xmpp_stanza.hpp>
+
+#include <memory>
+
+TEST_CASE("IRC colors parsing")
+{
+  std::unique_ptr<XmlNode> xhtml;
+  std::string cleaned_up;
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim("bold");
+  CHECK(xhtml);
+  CHECK(xhtml->to_string() == "<body xmlns='http://www.w3.org/1999/xhtml'><span style='font-weight:bold;'>bold</span></body>");
+
+  std::tie(cleaned_up, xhtml) =
+    irc_format_to_xhtmlim("normalboldunder-and-boldbold normal"
+                          "5red,5default-on-red10,2cyan-on-blue");
+  CHECK(xhtml);
+  CHECK(xhtml->to_string() == "<body xmlns='http://www.w3.org/1999/xhtml'>normal<span style='font-weight:bold;'>bold</span><span style='font-weight:bold;text-decoration:underline;'>under-and-bold</span><span style='font-weight:bold;'>bold</span> normal<span style='color:red;'>red</span><span style='background-color:red;'>default-on-red</span><span style='color:cyan;background-color:blue;'>cyan-on-blue</span></body>");
+  CHECK(cleaned_up == "normalboldunder-and-boldbold normalreddefault-on-redcyan-on-blue");
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim("normal");
+  CHECK_FALSE(xhtml);
+  CHECK(cleaned_up == "normal");
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim("");
+  CHECK(xhtml);
+  CHECK(!xhtml->has_children());
+  CHECK(cleaned_up.empty());
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim(",a");
+  CHECK(xhtml);
+  CHECK(!xhtml->has_children());
+  CHECK(cleaned_up == "a");
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim(",");
+  CHECK(xhtml);
+  CHECK(!xhtml->has_children());
+  CHECK(cleaned_up.empty());
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim("[\x1D13dolphin-emu/dolphin\x1D] 03foo commented on #283 (Add support for the guide button to XInput): 02http://example.com");
+  CHECK(xhtml->to_string() == "<body xmlns='http://www.w3.org/1999/xhtml'>[<span style='font-style:italic;'/><span style='font-style:italic;color:lightmagenta;'>dolphin-emu/dolphin</span><span style='color:lightmagenta;'>] </span><span style='color:green;'>foo</span> commented on #283 (Add support for the guide button to XInput): <span style='text-decoration:underline;'/><span style='text-decoration:underline;color:blue;'>http://example.com</span><span style='text-decoration:underline;'/></body>");
+  CHECK(cleaned_up == "[dolphin-emu/dolphin] foo commented on #283 (Add support for the guide button to XInput): http://example.com");
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim("0e46ab by 03Pierre Dindon [090|091|040] 02http://example.net/Ojrh4P media: avoid pop-in effect when loading thumbnails by specifying an explicit size");
+  CHECK(cleaned_up == "0e46ab by Pierre Dindon [0|1|0] http://example.net/Ojrh4P media: avoid pop-in effect when loading thumbnails by specifying an explicit size");
+  CHECK(xhtml->to_string() == "<body xmlns='http://www.w3.org/1999/xhtml'>0e46ab by <span style='color:green;'>Pierre Dindon</span> [<span style='color:lightgreen;'>0</span>|<span style='color:lightgreen;'>1</span>|<span style='color:indianred;'>0</span>] <span style='text-decoration:underline;'/><span style='text-decoration:underline;color:blue;'>http://example.net/Ojrh4P</span><span style='text-decoration:underline;'/> media: avoid pop-in effect when loading thumbnails by specifying an explicit size</body>");
+
+  std::tie(cleaned_up, xhtml) = irc_format_to_xhtmlim("test\ncoucou");
+  CHECK(cleaned_up == "test\ncoucou");
+  CHECK(xhtml->to_string() == "<body xmlns='http://www.w3.org/1999/xhtml'>test<br/>coucou</body>");
+}

tests/config.cpp

@@ -0,0 +1,25 @@
+#include "catch.hpp"
+
+#include <config/config.hpp>
+
+TEST_CASE("Config basic")
+{
+  Config::filename = "test.cfg";
+  Config::file_must_exist = false;
+  Config::set("coucou", "bonjour", true);
+  Config::close();
+
+  bool error = false;
+  try
+    {
+      Config::file_must_exist = true;
+      CHECK(Config::get("coucou", "") == "bonjour");
+      CHECK(Config::get("does not exist", "default") == "default");
+      Config::close();
+    }
+  catch (const std::ios::failure& e)
+    {
+      error = true;
+    }
+  CHECK_FALSE(error);
+}

tests/database.cpp

@@ -0,0 +1,30 @@
+#include "catch.hpp"
+
+#include <database/database.hpp>
+
+#include <unistd.h>
+#include <config/config.hpp>
+
+TEST_CASE("Database")
+{
+#ifdef USE_DATABASE
+  // Remove any potential existing db
+  ::unlink("./test.db");
+  Config::set("db_name", "test.db");
+  Database::set_verbose(false);
+  auto o = Database::get_irc_server_options("zouzou@example.com", "irc.example.com");
+  o.update();
+  auto a = Database::get_irc_server_options("zouzou@example.com", "irc.example.com");
+  auto b = Database::get_irc_server_options("moumou@example.com", "irc.example.com");
+
+  // b does not yet exist in the db, the object is created but not yet
+  // inserted
+  CHECK(1 == Database::count<db::IrcServerOptions>());
+
+  b.update();
+  CHECK(2 == Database::count<db::IrcServerOptions>());
+
+  CHECK(b.pass == "");
+  CHECK(b.pass.value() == "");
+#endif
+}

tests/dns.cpp

@@ -0,0 +1,83 @@
+#include "catch.hpp"
+
+#include <network/dns_handler.hpp>
+#include <network/resolver.hpp>
+#include <network/poller.hpp>
+
+#include <utils/timed_events.hpp>
+
+TEST_CASE("DNS resolver")
+{
+    Resolver resolver;
+
+    /**
+     * If we are using cares, we need to run a poller loop until each
+     * resolution is finished. Without cares we get the result before
+     * resolve() returns because it’s blocking.
+     */
+#ifdef CARES_FOUND
+    auto p = std::make_shared<Poller>();
+
+    const auto loop = [&p]()
+      {
+        do
+          {
+            DNSHandler::instance.watch_dns_sockets(p);
+          }
+        while (p->poll(utils::no_timeout) != -1);
+      };
+#else
+    // We don’t need to do anything if we are not using cares.
+    const auto loop = [](){};
+#endif
+
+    std::string hostname;
+    std::string port = "6667";
+
+    bool success = true;
+
+    auto error_cb = [&success, &hostname, &port](const char* msg)
+      {
+        INFO("Failed to resolve " << hostname << ":" << port << ": " << msg);
+        success = false;
+      };
+    auto success_cb = [&success, &hostname, &port](const struct addrinfo* addr)
+      {
+        INFO("Successfully resolved " << hostname << ":" << port << ": " << addr_to_string(addr));
+        success = true;
+      };
+
+    hostname = "example.com";
+    resolver.resolve(hostname, port,
+                     success_cb, error_cb);
+    loop();
+    CHECK(success);
+
+    hostname = "this.should.fail.because.it.is..misformatted";
+    resolver.resolve(hostname, port,
+                     success_cb, error_cb);
+    loop();
+    CHECK(!success);
+
+    hostname = "this.should.fail.because.it.is.does.not.exist.invalid";
+    resolver.resolve(hostname, port,
+                     success_cb, error_cb);
+    loop();
+    CHECK(!success);
+
+    hostname = "localhost6";
+    resolver.resolve(hostname, port,
+                     success_cb, error_cb);
+    loop();
+    CHECK(success);
+
+    hostname = "localhost";
+    resolver.resolve(hostname, port,
+                     success_cb, error_cb);
+    loop();
+    CHECK(success);
+
+#ifdef CARES_FOUND
+    DNSHandler::instance.destroy();
+#endif
+}

tests/encoding.cpp

@@ -0,0 +1,56 @@
+#include "catch.hpp"
+
+#include <utils/encoding.hpp>
+
+
+TEST_CASE("UTF-8 validation")
+{
+  const char* valid = "C̡͔͕̩͙̽ͫ̈́ͥ̿̆ͧ̚r̸̩̘͍̻͖̆͆͛͊̉̕͡o͇͈̳̤̱̊̈͢q̻͍̦̮͕ͥͬͬ̽ͭ͌̾ͅǔ͉͕͇͚̙͉̭͉̇̽ȇ͈̮̼͍͔ͣ͊͞͝ͅ ͫ̾ͪ̓ͥ̆̋̔҉̢̦̠͈͔̖̲̯̦ụ̶̯͐̃̋ͮ͆͝n̬̱̭͇̻̱̰̖̤̏͛̏̿̑͟ë́͐҉̸̥̪͕̹̻̙͉̰ ̹̼̱̦̥ͩ͑̈́͑͝ͅt͍̥͈̹̝ͣ̃̔̈̔ͧ̕͝ḙ̸̖̟̙͙ͪ͢ų̯̞̼̲͓̻̞͛̃̀́b̮̰̗̩̰̊̆͗̾̎̆ͯ͌͝.̗̙͎̦ͫ̈́ͥ͌̈̓ͬ";
+  CHECK(utils::is_valid_utf8(valid));
+  CHECK_FALSE(utils::is_valid_utf8("\xF0\x0F"));
+  CHECK_FALSE(utils::is_valid_utf8("\xFE\xFE\xFF\xFF"));
+
+  std::string in = "Biboumi ╯°□°）╯︵ ┻━┻";
+  INFO(in);
+  CHECK(utils::is_valid_utf8(in.data()));
+}
+
+TEST_CASE("UTF-8 conversion")
+{
+  std::string in = "Biboumi ╯°□°）╯︵ ┻━┻";
+  REQUIRE(utils::is_valid_utf8(in.data()));
+
+  SECTION("Converting UTF-8 to UTF-8 should return the same string")
+    {
+      std::string res = utils::convert_to_utf8(in, "UTF-8");
+      CHECK(utils::is_valid_utf8(res.c_str()) == true);
+      CHECK(res == in);
+    }
+
+  SECTION("Testing latin-1 conversion")
+    {
+      std::string original_utf8("couc¥ou");
+      std::string original_latin1("couc\xa5ou");
+
+      SECTION("Convert proper latin-1 to UTF-8")
+        {
+          std::string from_latin1 = utils::convert_to_utf8(original_latin1.c_str(), "ISO-8859-1");
+          CHECK(from_latin1 == original_utf8);
+        }
+      SECTION("Check the behaviour when the decoding fails (here because we provide a wrong charset)")
+        {
+          std::string from_ascii = utils::convert_to_utf8(original_latin1, "US-ASCII");
+          CHECK(from_ascii == "couc�ou");
+        }
+    }
+}
+
+TEST_CASE("Remove invalid XML chars")
+{
+  std::string without_ctrl_char("𤭢€¢$");
+  std::string in = "Biboumi ╯°□°）╯︵ ┻━┻";
+  INFO(in);
+  CHECK(utils::remove_invalid_xml_chars(without_ctrl_char) == without_ctrl_char);
+  CHECK(utils::remove_invalid_xml_chars(in) == in);
+  CHECK(utils::remove_invalid_xml_chars("\acouco\u0008u\uFFFEt\uFFFFe\r\n♥") == "coucoute\r\n♥");
+}

tests/iid.cpp

@@ -0,0 +1,122 @@
+#include "catch.hpp"
+
+#include <irc/iid.hpp>
+#include <irc/irc_user.hpp>
+
+#include <config/config.hpp>
+
+TEST_CASE("Irc user parsing")
+{
+  const std::map<char, char> prefixes{{'!', 'a'}, {'@', 'o'}};
+
+  IrcUser user1("!nick!~some@host.bla", prefixes);
+  CHECK(user1.nick == "nick");
+  CHECK(user1.host == "~some@host.bla");
+  CHECK(user1.modes.size() == 1);
+  CHECK(user1.modes.find('a') != user1.modes.end());
+
+  IrcUser user2("coucou!~other@host.bla", prefixes);
+  CHECK(user2.nick == "coucou");
+  CHECK(user2.host == "~other@host.bla");
+  CHECK(user2.modes.empty());
+  CHECK(user2.modes.find('a') == user2.modes.end());
+}
+
+/**
+ * Let Catch know how to display Iid objects
+ */
+namespace Catch
+{
+  template<>
+  struct StringMaker<Iid>
+  {
+    static std::string convert(const Iid& value)
+    {
+      return std::to_string(value);
+    }
+  };
+}
+
+TEST_CASE("Iid creation")
+{
+    Iid iid1("foo!irc.example.org");
+    CHECK(std::to_string(iid1) == "foo!irc.example.org");
+    CHECK(iid1.get_local() == "foo");
+    CHECK(iid1.get_server() == "irc.example.org");
+    CHECK(!iid1.is_channel);
+    CHECK(iid1.is_user);
+
+    Iid iid2("#test%irc.example.org");
+    CHECK(std::to_string(iid2) == "#test%irc.example.org");
+    CHECK(iid2.get_local() == "#test");
+    CHECK(iid2.get_server() == "irc.example.org");
+    CHECK(iid2.is_channel);
+    CHECK(!iid2.is_user);
+
+    Iid iid3("%irc.example.org");
+    CHECK(std::to_string(iid3) == "%irc.example.org");
+    CHECK(iid3.get_local() == "");
+    CHECK(iid3.get_server() == "irc.example.org");
+    CHECK(iid3.is_channel);
+    CHECK(!iid3.is_user);
+
+    Iid iid4("irc.example.org");
+    CHECK(std::to_string(iid4) == "irc.example.org");
+    CHECK(iid4.get_local() == "");
+    CHECK(iid4.get_server() == "irc.example.org");
+    CHECK(!iid4.is_channel);
+    CHECK(!iid4.is_user);
+
+    Iid iid5("nick!");
+    CHECK(std::to_string(iid5) == "nick!");
+    CHECK(iid5.get_local() == "nick");
+    CHECK(iid5.get_server() == "");
+    CHECK(!iid5.is_channel);
+    CHECK(iid5.is_user);
+
+    Iid iid6("##channel%");
+    CHECK(std::to_string(iid6) == "##channel%");
+    CHECK(iid6.get_local() == "##channel");
+    CHECK(iid6.get_server() == "");
+    CHECK(iid6.is_channel);
+    CHECK(!iid6.is_user);
+}
+
+TEST_CASE("Iid creation in fixed_server mode")
+{
+    Config::set("fixed_irc_server", "fixed.example.com", false);
+
+    Iid iid1("foo!irc.example.org");
+    CHECK(std::to_string(iid1) == "foo!");
+    CHECK(iid1.get_local() == "foo");
+    CHECK(iid1.get_server() == "fixed.example.com");
+    CHECK(!iid1.is_channel);
+    CHECK(iid1.is_user);
+
+    Iid iid2("#test%irc.example.org");
+    CHECK(std::to_string(iid2) == "#test%irc.example.org");
+    CHECK(iid2.get_local() == "#test%irc.example.org");
+    CHECK(iid2.get_server() == "fixed.example.com");
+    CHECK(iid2.is_channel);
+    CHECK(!iid2.is_user);
+
+    // Note that it is impossible to adress the IRC server directly, or to
+    // use the virtual channel, in that mode
+
+    // Iid iid3("%irc.example.org");
+    // Iid iid4("irc.example.org");
+
+    Iid iid5("nick!");
+    CHECK(std::to_string(iid5) == "nick!");
+    CHECK(iid5.get_local() == "nick");
+    CHECK(iid5.get_server() == "fixed.example.com");
+    CHECK(!iid5.is_channel);
+    CHECK(iid5.is_user);
+
+    Iid iid6("##channel%");
+    CHECK(std::to_string(iid6) == "##channel%");
+    CHECK(iid6.get_local() == "##channel%");
+    CHECK(iid6.get_server() == "fixed.example.com");
+    CHECK(iid6.is_channel);
+    CHECK(!iid6.is_user);
+}

tests/jid.cpp

@@ -0,0 +1,39 @@
+#include "catch.hpp"
+
+#include <xmpp/jid.hpp>
+#include <louloulibs.h>
+
+TEST_CASE("Jid")
+{
+  Jid jid1("♥@ツ.coucou/coucou@coucou/coucou");
+  CHECK(jid1.local == "♥");
+  CHECK(jid1.domain == "ツ.coucou");
+  CHECK(jid1.resource == "coucou@coucou/coucou");
+
+  // Domain and resource
+  Jid jid2("ツ.coucou/coucou@coucou/coucou");
+  CHECK(jid2.local == "");
+  CHECK(jid2.domain == "ツ.coucou");
+  CHECK(jid2.resource == "coucou@coucou/coucou");
+
+  // Jidprep
+  const std::string badjid("~zigougou™@EpiK-7D9D1FDE.poez.io/Boujour/coucou/slt™");
+  const std::string correctjid = jidprep(badjid);
+#ifdef LIBIDN_FOUND
+  CHECK(correctjid == "~zigougoutm@epik-7d9d1fde.poez.io/Boujour/coucou/sltTM");
+  // Check that the cache does not break things when we prep the same string
+  // multiple times
+  CHECK(jidprep(badjid) == "~zigougoutm@epik-7d9d1fde.poez.io/Boujour/coucou/sltTM");
+  CHECK(jidprep(badjid) == "~zigougoutm@epik-7d9d1fde.poez.io/Boujour/coucou/sltTM");
+
+  const std::string badjid2("Zigougou@poez.io");
+  const std::string correctjid2 = jidprep(badjid2);
+  CHECK(correctjid2 == "zigougou@poez.io");
+
+  const std::string crappy("~Bisous@7ea8beb1:c5fd2849:da9a048e:ip");
+  const std::string fixed_crappy = jidprep(crappy);
+  CHECK(fixed_crappy == "~bisous@7ea8beb1-c5fd2849-da9a048e-ip");
+#else // Without libidn, jidprep always returns an empty string
+  CHECK(jidprep(badjid) == "");
+#endif
+}

tests/test.cpp

@@ -0,0 +1,2 @@
+#define CATCH_CONFIG_MAIN
+#include "catch.hpp"

tests/timed_events.cpp

@@ -0,0 +1,62 @@
+#include "catch.hpp"
+
+#include <utils/timed_events.hpp>
+
+/**
+ * Let Catch know how to display std::chrono::duration values
+ */
+namespace Catch
+{
+  template<typename Rep, typename Period> struct StringMaker<std::chrono::duration<Rep, Period>>
+  {
+    static std::string convert(const std::chrono::duration<Rep, Period>& value)
+    {
+      return  std::to_string(std::chrono::duration_cast<std::chrono::milliseconds>(value).count()) + "ms";
+    }
+  };
+}
+
+/**
+ * TODO, use a mock clock instead of relying on the real time with a sleep:
+ * it’s unreliable on heavy load.
+ */
+#include <thread>
+
+TEST_CASE("Test timed event expiration")
+{
+  SECTION("Check what happens when there is no events")
+    {
+      CHECK(TimedEventsManager::instance().get_timeout() == utils::no_timeout);
+      CHECK(TimedEventsManager::instance().execute_expired_events() == 0);
+    }
+
+  // Add a single event
+  TimedEventsManager::instance().add_event(TimedEvent(std::chrono::steady_clock::now() + 50ms, [](){}));
+
+  // The event should not yet be expired
+  CHECK(TimedEventsManager::instance().get_timeout() > 0ms);
+  CHECK(TimedEventsManager::instance().execute_expired_events() == 0);
+
+  std::chrono::milliseconds timoute = TimedEventsManager::instance().get_timeout();
+  INFO("Sleeping for " << timoute.count() << "ms");
+  std::this_thread::sleep_for(timoute);
+
+  // Event is now expired
+  CHECK(TimedEventsManager::instance().execute_expired_events() == 1);
+  CHECK(TimedEventsManager::instance().get_timeout() == utils::no_timeout);
+}
+
+TEST_CASE("Test timed event cancellation")
+{
+  auto now = std::chrono::steady_clock::now();
+  TimedEventsManager::instance().add_event(TimedEvent(now + 100ms, [](){ }, "un"));
+  TimedEventsManager::instance().add_event(TimedEvent(now + 200ms, [](){ }, "deux"));
+  TimedEventsManager::instance().add_event(TimedEvent(now + 300ms, [](){ }, "deux"));
+
+  CHECK(TimedEventsManager::instance().get_timeout() > 0ms);
+  CHECK(TimedEventsManager::instance().size() == 3);
+  CHECK(TimedEventsManager::instance().cancel("un") == 1);
+  CHECK(TimedEventsManager::instance().size() == 2);
+  CHECK(TimedEventsManager::instance().cancel("deux") == 2);
+  CHECK(TimedEventsManager::instance().get_timeout() == utils::no_timeout);
+}

tests/utils.cpp

@@ -0,0 +1,72 @@
+#include "catch.hpp"
+
+#include <utils/tolower.hpp>
+#include <utils/revstr.hpp>
+#include <utils/string.hpp>
+#include <utils/split.hpp>
+#include <utils/xdg.hpp>
+
+TEST_CASE("String split")
+{
+  std::vector<std::string> splitted = utils::split("a::a", ':', false);
+  CHECK(splitted.size() == 2);
+  splitted = utils::split("a::a", ':', true);
+  CHECK(splitted.size() == 3);
+  CHECK(splitted[0] == "a");
+  CHECK(splitted[1] == "");
+  CHECK(splitted[2] == "a");
+  splitted = utils::split("\na", '\n', true);
+  CHECK(splitted.size() == 2);
+  CHECK(splitted[0] == "");
+  CHECK(splitted[1] == "a");
+}
+
+TEST_CASE("tolower")
+{
+  const std::string lowercase = utils::tolower("CoUcOu LeS CoPaiNs ♥");
+  CHECK(lowercase == "coucou les copains ♥");
+
+  const std::string ltr = "coucou";
+  CHECK(utils::revstr(ltr) == "uocuoc");
+}
+
+TEST_CASE("to_bool")
+{
+  CHECK(to_bool("true"));
+  CHECK(!to_bool("trou"));
+  CHECK(to_bool("1"));
+  CHECK(!to_bool("0"));
+  CHECK(!to_bool("-1"));
+  CHECK(!to_bool("false"));
+}
+
+TEST_CASE("xdg_*_path")
+{
+  ::unsetenv("XDG_CONFIG_HOME");
+  ::unsetenv("HOME");
+  std::string res;
+
+  SECTION("Without XDG_CONFIG_HOME nor HOME")
+    {
+      res = xdg_config_path("coucou.txt");
+      CHECK(res == "coucou.txt");
+    }
+  SECTION("With only HOME")
+    {
+      ::setenv("HOME", "/home/user", 1);
+      res = xdg_config_path("coucou.txt");
+      CHECK(res == "/home/user/.config/biboumi/coucou.txt");
+    }
+  SECTION("With only XDG_CONFIG_HOME")
+    {
+      ::setenv("XDG_CONFIG_HOME", "/some_weird_dir", 1);
+      res = xdg_config_path("coucou.txt");
+      CHECK(res == "/some_weird_dir/biboumi/coucou.txt");
+    }
+  SECTION("With XDG_DATA_HOME")
+    {
+      ::setenv("XDG_DATA_HOME", "/datadir", 1);
+      res = xdg_data_path("bonjour.txt");
+      CHECK(res == "/datadir/biboumi/bonjour.txt");
+    }
+}

tests/uuid.cpp

@@ -0,0 +1,13 @@
+#include "catch.hpp"
+
+#include <xmpp/xmpp_component.hpp>
+
+TEST_CASE("id generation")
+{
+  const std::string first_uuid = XmppComponent::next_id();
+  const std::string second_uuid = XmppComponent::next_id();
+
+  CHECK(first_uuid.size() == 36);
+  CHECK(second_uuid.size() == 36);
+  CHECK(first_uuid != second_uuid);
+}

tests/xmpp.cpp

@@ -0,0 +1,47 @@
+#include "catch.hpp"
+
+#include <xmpp/xmpp_parser.hpp>
+
+TEST_CASE("Test basic XML parsing")
+{
+  XmppParser xml;
+
+  const std::string doc = "<stream xmlns='stream_ns'><stanza b='c'>inner<child1><grandchild/></child1><child2 xmlns='child2_ns'/>tail</stanza></stream>";
+
+  auto check_stanza = [](const Stanza& stanza)
+    {
+      CHECK(stanza.get_name() == "stanza");
+      CHECK(stanza.get_tag("xmlns") == "stream_ns");
+      CHECK(stanza.get_tag("b") == "c");
+      CHECK(stanza.get_inner() == "inner");
+      CHECK(stanza.get_tail() == "");
+      CHECK(stanza.get_child("child1", "stream_ns") != nullptr);
+      CHECK(stanza.get_child("child2", "stream_ns") == nullptr);
+      CHECK(stanza.get_child("child2", "child2_ns") != nullptr);
+      CHECK(stanza.get_child("child2", "child2_ns")->get_tail() == "tail");
+    };
+  xml.add_stanza_callback([check_stanza](const Stanza& stanza)
+      {
+        check_stanza(stanza);
+        // Do the same checks on a copy of that stanza.
+        Stanza copy(stanza);
+        check_stanza(copy);
+      });
+  xml.feed(doc.data(), doc.size(), true);
+
+  const std::string doc2 = "<stream xmlns='s'><stanza>coucou\r\n\a</stanza></stream>";
+  xml.add_stanza_callback([](const Stanza& stanza)
+      {
+        CHECK(stanza.get_inner() == "coucou\r\n");
+      });
+
+  xml.feed(doc2.data(), doc.size(), true);
+}
+
+TEST_CASE("XML escape/unescape")
+{
+  const std::string unescaped = "'coucou'<cc>/&\"gaga\"";
+  CHECK(xml_escape(unescaped) == "&apos;coucou&apos;&lt;cc&gt;/&amp;&quot;gaga&quot;");
+  CHECK(xml_unescape(xml_escape(unescaped)) == unescaped);
+}
+