[welcome] Add (stub) test for the Config object

This crashes because there's no translations object yet,
but that is an internal issue.

src/modules/welcome/CMakeLists.txt

@@ -42,3 +42,13 @@ calamares_add_plugin( welcome
         Qt5::Network
     SHARED_LIB
 )
+
+calamares_add_test(
+    welcometest
+    SOURCES
+        Config.cpp
+        Tests.cpp
+    LIBRARIES
+        Qt5::Widgets
+        Calamares::calamaresui
+)

src/modules/welcome/Tests.cpp

@@ -0,0 +1,61 @@
+/* === This file is part of Calamares - <https://calamares.io> ===
+ *
+ *   SPDX-FileCopyrightText: 2021 Adriaan de Groot <groot@kde.org>
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   Calamares is Free Software: see the License-Identifier above.
+ *
+ */
+
+#include "Config.h"
+
+#include "utils/Logger.h"
+#include "utils/Yaml.h"
+
+#include <QtTest/QtTest>
+
+class WelcomeTests : public QObject
+{
+    Q_OBJECT
+public:
+    WelcomeTests();
+    ~WelcomeTests() override {}
+
+private Q_SLOTS:
+    void initTestCase();
+
+    void testOneUrl();
+};
+
+WelcomeTests::WelcomeTests() {}
+
+void
+WelcomeTests::initTestCase()
+{
+    Logger::setupLogLevel( Logger::LOGDEBUG );
+    cDebug() << "Welcome test started.";
+}
+
+void
+WelcomeTests::testOneUrl()
+{
+    Config c;
+
+    // BUILD_AS_TEST is the source-directory path
+    QString filename = QStringLiteral( "1a-checkinternet.conf" );
+    QFile fi( QString( "%1/%2" ).arg( BUILD_AS_TEST, filename ) );
+    QVERIFY( fi.exists() );
+
+    bool ok = false;
+    const auto map = CalamaresUtils::loadYaml( fi, &ok );
+    QVERIFY( ok );
+    QVERIFY( map.count() > 0 );
+    QVERIFY( map.contains( "requirements" ) );
+}
+
+
+QTEST_GUILESS_MAIN( WelcomeTests )
+
+#include "utils/moc-warnings.h"
+
+#include "Tests.moc"

src/modules/welcome/tests/1a-checkinternet.conf

@@ -0,0 +1,3 @@
+---
+requirements:
+    internetCheckUrl:   http://example.com