Add test for libc interception

Test intercepted getaddrinfo().
Building with 'as-needed' option is a must to reproduce QTBUG-110287.

Task-number: QTBUG-110287
Change-Id: I5ec2554c3b73efc9b1f1fdd7da0b6c7cbb360f25
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

3 files changed, 53 insertions, 0 deletions

diff --git a/tests/auto/widgets/CMakeLists.txt b/tests/auto/widgets/CMakeLists.txt
index 34d165c94..9246be68a 100644
--- a/tests/auto/widgets/CMakeLists.txt
+++ b/tests/auto/widgets/CMakeLists.txt
@@ -16,6 +16,7 @@ add_subdirectory(qwebenginehistory)
 add_subdirectory(qwebenginescript)
 if(LINUX)
     add_subdirectory(offscreen)
+    add_subdirectory(qtbug_110287)
 endif()
 if(NOT MACOS)
     add_subdirectory(touchinput)
diff --git a/tests/auto/widgets/qtbug_110287/CMakeLists.txt b/tests/auto/widgets/qtbug_110287/CMakeLists.txt
new file mode 100644
index 000000000..6d27aa3ef
--- /dev/null
+++ b/tests/auto/widgets/qtbug_110287/CMakeLists.txt
@@ -0,0 +1,11 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+qt_internal_add_test(tst_qtbug_110287
+    SOURCES
+        tst_qtbug_110287.cpp
+    LIBRARIES
+        Qt::Network
+        Qt::WebEngineWidgets
+)
+target_link_options(tst_qtbug_110287 PRIVATE "-Wl,--as-needed")
diff --git a/tests/auto/widgets/qtbug_110287/tst_qtbug_110287.cpp b/tests/auto/widgets/qtbug_110287/tst_qtbug_110287.cpp
new file mode 100644
index 000000000..457df700f
--- /dev/null
+++ b/tests/auto/widgets/qtbug_110287/tst_qtbug_110287.cpp
@@ -0,0 +1,41 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QNetworkAccessManager>
+#include <QNetworkRequest>
+#include <QSignalSpy>
+#include <QTest>
+#include <QWebEngineView>
+
+class tst_qtbug_110287 : public QObject
+{
+    Q_OBJECT
+public:
+    tst_qtbug_110287() { }
+
+private slots:
+    void getAddrInfo();
+};
+
+void tst_qtbug_110287::getAddrInfo()
+{
+    QNetworkAccessManager nam;
+    QSignalSpy namSpy(&nam, &QNetworkAccessManager::finished);
+
+    QString address("http://www.qt.io");
+    QScopedPointer<QNetworkReply> reply(nam.get(QNetworkRequest(address)));
+
+    if (!namSpy.wait(20000) || reply->error() != QNetworkReply::NoError)
+        QSKIP("Couldn't load page from network, skipping test.");
+
+    QWebEngineView view;
+    QSignalSpy loadFinishedSpy(&view, SIGNAL(loadFinished(bool)));
+
+    // load() will trigger system DNS resolution that uses getaddrinfo()
+    view.load(QUrl(address));
+    QTRY_COMPARE_WITH_TIMEOUT(loadFinishedSpy.size() > 0, true, 20000);
+    QTRY_COMPARE(loadFinishedSpy[0][0].toBool(), true);
+}
+
+#include "tst_qtbug_110287.moc"
+QTEST_MAIN(tst_qtbug_110287)