tst_QDnsLookup: also use the nameservers behind systemd-resolved

If the file exists, we are using systemd-resolved, so let's try directly
using the nameservers it uses.

Change-Id: I455fe22ef4ad4b2f9b01fffd17c7476a2385bf4b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

1 files changed, 17 insertions, 13 deletions

diff --git a/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp b/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp
index cfb764e796..b4619166cc 100644
--- a/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp
+++ b/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp
@@ -91,19 +91,23 @@ static QList<QHostAddress> systemNameservers()
         }
     }
 #else
-    QFile f("/etc/resolv.conf");
-    if (!f.open(QIODevice::ReadOnly))
-        return result;
-
-    while (!f.atEnd()) {
-        static const char command[] = "nameserver";
-        QByteArray line = f.readLine().simplified();
-        if (!line.startsWith(command))
-            continue;
-
-        QString addr = QLatin1StringView(line).mid(sizeof(command));
-        result.emplaceBack(addr);
-    }
+    auto parseFile = [&](QLatin1StringView path) {
+        QFile f(path);
+        if (!f.open(QIODevice::ReadOnly))
+            return;
+
+        while (!f.atEnd()) {
+            static const char command[] = "nameserver";
+            QByteArray line = f.readLine().simplified();
+            if (!line.startsWith(command))
+                continue;
+
+            QString addr = QLatin1StringView(line).mid(sizeof(command));
+            result.emplaceBack(addr);
+        }
+    };
+    parseFile("/etc/resolv.conf"_L1);
+    parseFile("/run/systemd/resolve/resolv.conf"_L1);
 #endif
 
     return result;