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Handle range conversions that do not start at 1 (#48298)

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J. Nick Koston 2021-03-24 12:33:44 -10:00 committed by GitHub
parent cc12d29f6d
commit c340a39275
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2 changed files with 35 additions and 2 deletions
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6
homeassistant/util/percentage.py
View File

@ -66,7 +66,8 @@ def ranged_value_to_percentage(
(1,255), 127: 50
(1,255), 10: 4
"""
return int((value * 100) // states_in_range(low_high_range))
offset = low_high_range[0] - 1
return int(((value - offset) * 100) // states_in_range(low_high_range))
def percentage_to_ranged_value(
@ -83,7 +84,8 @@ def percentage_to_ranged_value(
(1,255), 50: 127.5
(1,255), 4: 10.2
"""
return states_in_range(low_high_range) * percentage / 100
offset = low_high_range[0] - 1
return states_in_range(low_high_range) * percentage / 100 + offset
def states_in_range(low_high_range: tuple[float, float]) -> float:

31
tests/util/test_percentage.py
View File

@ -147,3 +147,34 @@ async def test_percentage_to_ranged_value_small():
assert math.ceil(percentage_to_ranged_value(range, 66)) == 4
assert math.ceil(percentage_to_ranged_value(range, 83)) == 5
assert math.ceil(percentage_to_ranged_value(range, 100)) == 6
async def test_ranged_value_to_percentage_starting_at_one():
"""Test a range that starts with 1."""
range = (1, 4)
assert ranged_value_to_percentage(range, 1) == 25
assert ranged_value_to_percentage(range, 2) == 50
assert ranged_value_to_percentage(range, 3) == 75
assert ranged_value_to_percentage(range, 4) == 100
async def test_ranged_value_to_percentage_starting_high():
"""Test a range that does not start with 1."""
range = (101, 255)
assert ranged_value_to_percentage(range, 101) == 0
assert ranged_value_to_percentage(range, 139) == 25
assert ranged_value_to_percentage(range, 178) == 50
assert ranged_value_to_percentage(range, 217) == 75
assert ranged_value_to_percentage(range, 255) == 100
async def test_ranged_value_to_percentage_starting_zero():
"""Test a range that starts with 0."""
range = (0, 3)
assert ranged_value_to_percentage(range, 0) == 25
assert ranged_value_to_percentage(range, 1) == 50
assert ranged_value_to_percentage(range, 2) == 75
assert ranged_value_to_percentage(range, 3) == 100