def test_derive_ionmode_positive_adduct():
spectrum_in = Spectrum(mz=numpy.array([], dtype="float"),
intensities=numpy.array([], dtype="float"),
metadata={"adduct": "[M+H]"})
spectrum = derive_ionmode(spectrum_in)
assert spectrum.get("ionmode") == "positive", "Expected different ionmode."
def test_derive_ionmode_positive_adduct():
spectrum_in = SpectrumBuilder().with_metadata({"adduct": "[M+H]"}).build()
spectrum = derive_ionmode(spectrum_in)
assert spectrum.get("ionmode") == "positive", "Expected different ionmode."
def test_derive_ionmode_empty_spectrum():
spectrum_in = None
spectrum = derive_ionmode(spectrum_in)
assert spectrum is None, "Expected differnt handling of None spectrum."