tst_qdtls: add 'invalidConfiguration' test

Test that we don't silently replace an invalid TLS configuration with
the default one (for now, the only thing that is considered to be
non-valid - is having non-DTLS protocol set).

Change-Id: I6f714b009cf1345a085a3f26d638fc31330f1a94
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/auto/network/ssl/qdtls/tst_qdtls.cpp b/tests/auto/network/ssl/qdtls/tst_qdtls.cpp
index 6ca4ca9b92..6a94eee389 100644
--- a/tests/auto/network/ssl/qdtls/tst_qdtls.cpp
+++ b/tests/auto/network/ssl/qdtls/tst_qdtls.cpp
@@ -88,6 +88,7 @@ private slots:
     void construction();
     void configuration_data();
     void configuration();
+    void invalidConfiguration();
     void setPeer_data();
     void setPeer();
     void handshake_data();
@@ -310,6 +311,20 @@ void tst_QDtls::configuration()
     }
 }
 
+void tst_QDtls::invalidConfiguration()
+{
+    QUdpSocket socket;
+    QDtls crypto(QSslSocket::SslClientMode);
+    QVERIFY(crypto.setPeer(serverAddress, serverPort));
+    // Note: not defaultDtlsConfiguration(), so the protocol is TLS (without D):
+    QVERIFY(crypto.setDtlsConfiguration(QSslConfiguration::defaultConfiguration()));
+    QDTLS_VERIFY_NO_ERROR(crypto);
+    QCOMPARE(crypto.dtlsConfiguration(), QSslConfiguration::defaultConfiguration());
+    // Try to start the handshake:
+    QCOMPARE(crypto.doHandshake(&socket), false);
+    QCOMPARE(crypto.dtlsError(), QDtlsError::TlsInitializationError);
+}
+
 void tst_QDtls::setPeer_data()
 {
     clientServerData();