circuitpython/tests/float/float_divmod_relaxed.py

36 lines
707 B
Python

# test floating point floor divide and modulus
# it has some tricky corner cases
# pyboard has 32-bit floating point and gives different (but still
# correct) answers for certain combinations of divmod arguments.
def test(x, y):
div, mod = divmod(x, y)
print(div == x // y, mod == x % y, abs(div * y + mod - x) < 1e-6)
test(1.23456, 0.7)
test(-1.23456, 0.7)
test(1.23456, -0.7)
test(-1.23456, -0.7)
a = 1.23456
b = 0.7
test(a, b)
test(a, -b)
test(-a, b)
test(-a, -b)
for i in range(25):
x = (i - 12.5) / 6
for j in range(25):
y = (j - 12.5) / 6
test(x, y)
# test division by zero error
try:
divmod(1.0, 0)
except ZeroDivisionError:
print("ZeroDivisionError")