def test_first_kernel_is_selected_if_de421_not_present():
kernel_filenames = ["1.bsp", "2.bsp"]
selected_kernel = ephem.select_kernel(kernel_filenames)
assert selected_kernel == "1.bsp"
def test_None_is_returned_if_list_is_empty():
assert ephem.select_kernel([]) is None
def test_de421_is_selected_if_present():
kernel_filenames = ["de421.bsp"]
selected_kernel = ephem.select_kernel(kernel_filenames)
assert selected_kernel == "de421.bsp"