def test_1024():
assert approximate_size(1000000000000, True) == "931.3 GiB"
def test_1000():
assert approximate_size(1000000000000) == "1.0 TB"
def test_4000_order():
assert approximate_size(a_kilobyte_is_1024_bytes=False,
size=4000) == "4.0 KB"
def test_4000():
assert approximate_size(4000, a_kilobyte_is_1024_bytes=False) == "4.0 KB"
def test_1k():
assert approximate_size(1024) == '1.0 KB'
def test_4000_case2():
assert approximate_size(size=4000) == "4.0 KB"