[libcalamares] Extend tests to all example config files

- Do a `find ../src/ -name *.conf` to get files to load
 - Load and save all of them to check for correctness

src/libcalamares/Tests.cpp

@@ -66,4 +66,46 @@ LibCalamaresTests::testLoadSaveYaml()
 
     auto map = CalamaresUtils::loadYaml( "settings.conf" );
     CalamaresUtils::saveYaml( "out.yaml", map );
+
+    auto other_map = CalamaresUtils::loadYaml( "out.yaml" );
+    CalamaresUtils::saveYaml(" out2.yaml", other_map );
+    QCOMPARE( map, other_map );
+
+    QFile::remove( "out.yaml" );
+    QFile::remove( "out2.yaml" );
+}
+
+static QStringList
+findConf( const QDir& d )
+{
+    QStringList mine;
+    if ( d.exists() )
+    {
+        QString path = d.absolutePath();
+        path.append( d.separator() );
+        for ( const auto& confname : d.entryList( { "*.conf" } ) )
+            mine.append( path + confname );
+        for ( const auto& subdirname : d.entryList( QDir::AllDirs | QDir::NoDotAndDotDot ) )
+        {
+            QDir subdir( d );
+            subdir.cd( subdirname );
+            mine.append( findConf( subdir ) );
+        }
+    }
+    return mine;
+}
+
+
+void
+LibCalamaresTests::testLoadSaveYamlExtended()
+{
+    for ( const auto& confname : findConf( QDir( "../src" ) ) )
+    {
+        cDebug() << "Testing" << confname;
+        auto map = CalamaresUtils::loadYaml( confname );
+        QVERIFY( CalamaresUtils::saveYaml( "out.yaml", map ) );
+        auto othermap = CalamaresUtils::loadYaml( "out.yaml" );
+        QCOMPARE( map, othermap );
+    }
+    QFile::remove( "out.yaml" );
 }

src/libcalamares/Tests.h

@@ -32,7 +32,8 @@ private Q_SLOTS:
     void initTestCase();
     void testDebugLevels();
 
-    void testLoadSaveYaml();
+    void testLoadSaveYaml();  // Just settings.conf
+    void testLoadSaveYamlExtended();  // Do a find() in the src dir
 };
 
 #endif