def test_generate_composite_key():
    assert (generate_composite_key('London', 'United Kingdom') == 'london_united-kingdom')
    assert (generate_composite_key('Paris', 'France') == 'paris_france')
    assert (generate_composite_key('Name-with hyphen', 'COUNTRY') == 'name-with-hyphen_country')
def test_generate_composite_key():
    assert (generate_composite_key('London', 'United Kingdom') == 'london_united-kingdom')
    assert (generate_composite_key('Paris', 'France') == 'paris_france')
    assert (generate_composite_key('Name-with hyphen', 'COUNTRY') == 'name-with-hyphen_country')