def test_clamp(self, default_tax_policy, default_tax_rate):
# Analogous test:
# https://github.com/terra-project/core/blob/develop/x/treasury/internal/types/constraint_test.go#L10
tax_policy = default_tax_policy
prev_rate = default_tax_rate
# Case 1: try to update delta > change_max
new_rate = prev_rate + tax_policy.change_max * 2
clamped_rate = tax_policy.clamp(prev_rate, new_rate)
assert prev_rate + tax_policy.change_max == clamped_rate
# Case 2: try to update delta > change_max (negative)
new_rate = prev_rate - tax_policy.change_max * 2
clamped_rate = tax_policy.clamp(prev_rate, new_rate)
assert prev_rate - tax_policy.change_max == clamped_rate
# Case 3: try to update the new rate > min_rate
prev_rate = tax_policy.rate_max
new_rate = prev_rate + Dec.with_prec(1, 3)
clamped_rate = tax_policy.clamp(prev_rate, new_rate)
assert tax_policy.rate_max == clamped_rate
# Case 4: try to update the new rate < minRate
prev_rate = tax_policy.rate_min
new_rate = tax_policy.rate_min - Dec.with_prec(1, 3)
clamped_rate = tax_policy.clamp(prev_rate, new_rate)
assert tax_policy.rate_min == clamped_rate
def default_tax_policy():
return PolicyConstraints(
rate_min=Dec.with_prec(5, 4),
rate_max=Dec.with_prec(1, 2),
cap=Coin("usdr", 1),
change_max=Dec.with_prec(25, 5),
)
def test_cosmos_mul(self):
examples = [
(Dec(-1), Dec(-1), Dec(1)),
(Dec(3), Dec(7), Dec(21)),
(Dec.with_prec(3333, 4), Dec.with_prec(333, 4), Dec.with_prec(1109889, 8),),
]
for x in examples:
assert x[0] * x[1] == x[2]
def test_cosmos_quo(self):
examples = [
(Dec(-1), Dec(-1), Dec(1)),
(Dec(3), Dec(7), Dec.with_prec(428571428571428571, 18)),
(
Dec.with_prec(3333, 4),
Dec.with_prec(333, 4),
Dec("10.009009009009009009"),
),
]
for x in examples:
assert x[0] / x[1] == x[2]
def default_tax_rate():
return Dec.with_prec(1, 3)
