micropython/tests/float/builtin_float_round.py

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# test round() with floats
# check basic cases
tests = [
[0.0], [1.0], [0.1], [-0.1], [123.4], [123.6], [-123.4], [-123.6],
[1.234567, 5], [1.23456, 1], [1.23456, 0], [1234.56, -2]
]
for t in tests:
print(round(*t))
# check .5 cases
for i in range(11):
print(round((i - 5) / 2))
# test second arg
for i in range(-1, 3):
print(round(1.47, i))
# test inf and nan
for val in (float('inf'), float('nan')):
try:
round(val)
except (ValueError, OverflowError) as e:
print(type(e))