SSH Agent: Integration tests against ssh-agent

Windows testing is currently explicitly disabled due to too many different scenarios to run an agent and MSYS2 having its own.

tests/TestSSHAgent.h

@@ -0,0 +1,46 @@
+/*
+ *  Copyright (C) 2020 KeePassXC Team <team@keepassxc.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TESTSSHAGENT_H
+#define TESTSSHAGENT_H
+
+#include "crypto/ssh/OpenSSHKey.h"
+#include <QObject>
+#include <QProcess>
+#include <QTemporaryFile>
+
+class TestSSHAgent : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void initTestCase();
+    void testConfiguration();
+    void testIdentity();
+    void testRemoveOnClose();
+    void testLifetimeConstraint();
+    void testConfirmConstraint();
+    void cleanupTestCase();
+
+private:
+    QTemporaryFile m_agentSocketFile;
+    QString m_agentSocketFileName;
+    QProcess m_agentProcess;
+    OpenSSHKey m_key;
+};
+
+#endif // TESTSSHAGENT_H