[partition] Set FS type explicitly if no layout is given

- the "simple" constructor for PartitionEntry left the FS type
  set as the constructor left it -- which is Unknown by default.
  This leads to install failures in systems that don't set a
  special layout but just want a single / -- because the FS is
  set to Unknown.
- massage the constructor and consumer of the code, push
  Ext4 FS in the tests and use the configured default in production.

src/modules/partition/core/PartitionLayout.cpp

@@ -63,8 +63,9 @@ PartitionLayout::PartitionEntry::PartitionEntry()
 {
 }
 
-PartitionLayout::PartitionEntry::PartitionEntry( const QString& mountPoint, const QString& size, const QString& minSize, const QString& maxSize )
+PartitionLayout::PartitionEntry::PartitionEntry( FileSystem::Type type, const QString& mountPoint, const QString& size, const QString& minSize, const QString& maxSize )
-    : partAttributes( 0 )
+    : partType( type )
+    , partAttributes( 0 )
     , partMountPoint( mountPoint )
     , partSize( size )
     , partMinSize( minSize )
@@ -148,7 +149,7 @@ PartitionLayout::init( const QVariantList& config )
 
     if ( !m_partLayout.count() )
     {
-        addEntry( { QString( "/" ), QString( "100%" ) } );
+        addEntry( { m_defaultFsType, QString( "/" ), QString( "100%" ) } );
     }
 }
 

src/modules/partition/core/PartitionLayout.h

@@ -44,8 +44,13 @@ public:
 
         /// @brief All-zeroes PartitionEntry
         PartitionEntry();
-        /// @brief Parse @p mountPoint, @p size, @p minSize and @p maxSize to their respective member variables
+        /** @brief Parse @p mountPoint, @p size, @p minSize and @p maxSize to their respective member variables
-        PartitionEntry( const QString& mountPoint,
+         *
+         * Sets a specific FS type (not parsed from string like the other
+         * constructor).
+         */
+        PartitionEntry( FileSystem::Type type,
+                        const QString& mountPoint,
                         const QString& size,
                         const QString& minSize = QString(),
                         const QString& maxSize = QString() );

src/modules/partition/tests/CreateLayoutsTests.cpp

@@ -59,7 +59,7 @@ CreateLayoutsTests::testFixedSizePartition()
     PartitionRole role( PartitionRole::Role::Any );
     QList< Partition* > partitions;
 
-    if ( !layout.addEntry( { QString( "/" ), QString( "5MiB" ) } ) )
+    if ( !layout.addEntry( { FileSystem::Type::Ext4, QString( "/" ), QString( "5MiB" ) } ) )
     {
         QFAIL( qPrintable( "Unable to create / partition" ) );
     }
@@ -79,7 +79,7 @@ CreateLayoutsTests::testPercentSizePartition()
     PartitionRole role( PartitionRole::Role::Any );
     QList< Partition* > partitions;
 
-    if ( !layout.addEntry( { QString( "/" ), QString( "50%" ) } ) )
+    if ( !layout.addEntry( { FileSystem::Type::Ext4, QString( "/" ), QString( "50%" ) } ) )
     {
         QFAIL( qPrintable( "Unable to create / partition" ) );
     }
@@ -99,17 +99,17 @@ CreateLayoutsTests::testMixedSizePartition()
     PartitionRole role( PartitionRole::Role::Any );
     QList< Partition* > partitions;
 
-    if ( !layout.addEntry( { QString( "/" ), QString( "5MiB" ) } ) )
+    if ( !layout.addEntry( { FileSystem::Type::Ext4, QString( "/" ), QString( "5MiB" ) } ) )
     {
         QFAIL( qPrintable( "Unable to create / partition" ) );
     }
 
-    if ( !layout.addEntry( { QString( "/home" ), QString( "50%" ) } ) )
+    if ( !layout.addEntry( { FileSystem::Type::Ext4, QString( "/home" ), QString( "50%" ) } ) )
     {
         QFAIL( qPrintable( "Unable to create /home partition" ) );
     }
 
-    if ( !layout.addEntry( { QString( "/bkup" ), QString( "50%" ) } ) )
+    if ( !layout.addEntry( { FileSystem::Type::Ext4, QString( "/bkup" ), QString( "50%" ) } ) )
     {
         QFAIL( qPrintable( "Unable to create /bkup partition" ) );
     }
@@ -124,7 +124,7 @@ CreateLayoutsTests::testMixedSizePartition()
 }
 
 #ifdef WITH_KPMCORE4API
-// TODO: Get a clean way to instanciate a test Device from KPMCore
+// TODO: Get a clean way to instantiate a test Device from KPMCore
 class DevicePrivate
 {
 public: