Included test to detect similar bugs in the future

Author: HowWeiBin

tests/pet_mad_dos/test_pet_mad_dos_basic_usage.py

@@ -27,11 +27,13 @@ def test_get_pet_mad_dos(version):
 def test_dos_calculation():
     calc = PETMADDOSCalculator()
     atoms = get_atoms()
-    results = calc.calculate(atoms, properties=["dos_raw", "dos_raw_per_atom"])
+    results = calc.calculate(atoms, properties=["dos_raw", "dos_raw_per_atom", "dos_denoised"])
     dos = results["dos_raw"]
     dos_per_atom = results["dos_raw_per_atom"]
+    dos_denoised = results["dos_denoised"]
     assert dos_per_atom.shape[0] == sum([len(item) for item in atoms])
     assert dos.shape[0] == len(atoms)
+    assert dos_denoised.shape[0] == len(atoms)
 
 
 def test_dos_calculation_single_item():