Dolphin unit test refactoring

This commit changes mainly two things:
1. The functionality related to the handling of temporary files and
folders is moved to a new class TestDir.
2. The setup of a temporary folder and of DolphinView instances is
now done in each unit test function. A benefit of this change is that
there are no unwanted interactions between different unit test functions
any more. Moreover, different test functions could now share a test
folder more easily.

Additionally, the reference arguments of all functions are changed to
pointers for consistency.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/tests/dolphinviewtest_columns.cpp b/src/tests/dolphinviewtest_columns.cpp
index 398446fca..40b88a223 100644
--- a/src/tests/dolphinviewtest_columns.cpp
+++ b/src/tests/dolphinviewtest_columns.cpp
@@ -31,8 +31,8 @@ public:
         return DolphinView::ColumnView;
     }
 
-    virtual bool verifyCorrectViewMode() const {
-        return (m_view->mode() == DolphinView::ColumnView);
+    virtual bool verifyCorrectViewMode(const DolphinView* view) const {
+        return (view->mode() == DolphinView::ColumnView);
     }
 
 };