adapt the tests after changing the defaults

dune/vtk/test/test-function.cc

@@ -92,39 +92,38 @@ int main (int argc, char** argv)
   Vtk::Function<GridView> func1{f1};
   VTK_ASSERT(func1.numComponents() == 1);
   VTK_ASSERT(func1.rangeType() == Vtk::RangeTypes::SCALAR);
-  VTK_ASSERT(func1.dataType() == Vtk::DataTypes::FLOAT32);
   writer.addPointData(func1, "p2");
 
   // test constructible by local-function
   Vtk::Function<GridView> func2{f2, "func2"};
   VTK_ASSERT(func2.numComponents() == 1);
   VTK_ASSERT(func2.rangeType() == Vtk::RangeTypes::UNSPECIFIED);
-  VTK_ASSERT(func2.dataType() == Vtk::DataTypes::FLOAT32);
+  VTK_ASSERT(func2.dataType() == Vtk::DataTypes::FLOAT64);
   writer.addPointData(func2);
 
   Vtk::Function<GridView> func3{f3, "func3", 3};
   VTK_ASSERT(func3.numComponents() == 3);
   VTK_ASSERT(func3.rangeType() == Vtk::RangeTypes::UNSPECIFIED);
-  VTK_ASSERT(func3.dataType() == Vtk::DataTypes::FLOAT32);
+  VTK_ASSERT(func3.dataType() == Vtk::DataTypes::FLOAT64);
   writer.addPointData(func3);
 
   // test constructible with component vector
   Vtk::Function<GridView> func4a{f3, "func4a", 1};
   VTK_ASSERT(func4a.numComponents() == 1);
   VTK_ASSERT(func4a.rangeType() == Vtk::RangeTypes::UNSPECIFIED);
-  VTK_ASSERT(func4a.dataType() == Vtk::DataTypes::FLOAT32);
+  VTK_ASSERT(func4a.dataType() == Vtk::DataTypes::FLOAT64);
   writer.addPointData(func4a);
 
   Vtk::Function<GridView> func4b{f3, "func4b", {1}}; // == func4a
   VTK_ASSERT(func4b.numComponents() == 1);
   VTK_ASSERT(func4b.rangeType() == Vtk::RangeTypes::UNSPECIFIED);
-  VTK_ASSERT(func4b.dataType() == Vtk::DataTypes::FLOAT32);
+  VTK_ASSERT(func4b.dataType() == Vtk::DataTypes::FLOAT64);
   writer.addPointData(func4b);
 
   Vtk::Function<GridView> func4c{f3, "func4c", std::vector{1}};
   VTK_ASSERT(func4c.numComponents() == 1);
   VTK_ASSERT(func4c.rangeType() == Vtk::RangeTypes::UNSPECIFIED);
-  VTK_ASSERT(func4c.dataType() == Vtk::DataTypes::FLOAT32);
+  VTK_ASSERT(func4c.dataType() == Vtk::DataTypes::FLOAT64);
   writer.addPointData(func4c);
 
   // Test copy-constructible