feractoring with a focus on top level structure

tests/filehandling/test_ntrfc_mesh.py

+import numpy as np
+import pyvista as pv
+
+
+def test_loadmesh_vtk(tmpdir):
+    """
+    tests if a vtk mesh can be read and Density is translated to rho
+    """
+    from ntrfc.filehandling.mesh import load_mesh
+
+    test_file = tmpdir / "tmp.vtk"
+    mesh = pv.Box()
+    mesh["Density"] = np.ones(mesh.number_of_cells)
+    mesh.save(test_file)
+    mesh_load = load_mesh(test_file)
+    assert "Density" in mesh_load.array_names
+
+
+def test_cgnsReader():
+    from ntrfc.filehandling.mesh import cgnsReader
+    # todo fill
+    a = cgnsReader
+    return 0