def test_notfour_isolates():
'''
return false when less than 4 rows are present
'''
with patch.object(RunSnpDetection, "__init__", lambda x: None):
detect_obj = RunSnpDetection()
tab = pandas.DataFrame({'A': [1, 2, 3]})
assert detect_obj.min_four_samples(tab)
def test_four_isolates():
'''
confirm that min of 4 rows are present
'''
with patch.object(RunSnpDetection, "__init__", lambda x: None):
detect_obj = RunSnpDetection()
tab = pandas.DataFrame({'A': [1, 2, 3, 4]})
assert detect_obj.min_four_samples(tab) == False