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# Apache License, Version 2.0
# ./blender.bin --background -noaudio --python tests/python/bl_pyapi_bpy_utils_units.py -- --verbose
import unittest
from bpy.utils import units
class UnitsTesting(unittest.TestCase):
# From user typing to 'internal' Blender value.
INPUT_TESTS = (
# system, type, ref, input, value
# LENGTH
('IMPERIAL', 'LENGTH', "", "1ft", 0.3048),
('IMPERIAL', 'LENGTH', "", "(1+1)ft", 0.3048 * 2),
('IMPERIAL', 'LENGTH', "", "1mi4\"", 1609.344 + 0.0254 * 4),
('METRIC', 'LENGTH', "", "0.005µm", 0.000001 * 0.005),
('METRIC', 'LENGTH', "", "1e6km", 1000.0 * 1e6),
('IMPERIAL', 'LENGTH', "", "1ft5cm", 0.3048 + 0.01 * 5),
('METRIC', 'LENGTH', "", "1ft5cm", 0.3048 + 0.01 * 5),
# Using reference string to find a unit when none is given.
('IMPERIAL', 'LENGTH', "33.3ft", "1", 0.3048),
('METRIC', 'LENGTH', "33.3dm", "1", 0.1),
('IMPERIAL', 'LENGTH', "33.3cm", "1", 0.3048), # ref unit is not in IMPERIAL system, default to feet...
('IMPERIAL', 'LENGTH', "33.3ft", "1\"", 0.0254), # unused ref unit, since one is given already!
('IMPERIAL', 'LENGTH', "", "1+1ft", 0.3048 * 2), # default unit taken from current string (feet).
('METRIC', 'LENGTH', "", "1+1ft", 1.3048), # no metric units, we default to meters.
('IMPERIAL', 'LENGTH', "", "3+1in+1ft", 0.3048 * 4 + 0.0254), # bigger unit becomes default one!
('IMPERIAL', 'LENGTH', "", "(3+1)in+1ft", 0.3048 + 0.0254 * 4),
)
# From 'internal' Blender value to user-friendly printing
OUTPUT_TESTS = (
# system, type, prec, sep, compat, value, output
# LENGTH
# Note: precision handling is a bit complicated when using multi-units...
('IMPERIAL', 'LENGTH', 3, False, False, 0.3048, "1'"),
('IMPERIAL', 'LENGTH', 3, False, True, 0.3048, "1ft"),
('IMPERIAL', 'LENGTH', 4, True, False, 0.3048 * 2 + 0.0254 * 5.5, "2' 5.5\""),
('IMPERIAL', 'LENGTH', 3, False, False, 1609.344 * 1e6, "1000000 mi"),
('IMPERIAL', 'LENGTH', 6, False, False, 1609.344 * 1e6, "1000000 mi"),
('METRIC', 'LENGTH', 3, True, False, 1000 * 2 + 0.001 * 15, "2 km 2 cm"),
('METRIC', 'LENGTH', 5, True, False, 1234.56789, "1 km 234.6 m"),
('METRIC', 'LENGTH', 6, True, False, 1234.56789, "1 km 234.57 m"),
('METRIC', 'LENGTH', 9, False, False, 1234.56789, "1.234568 km"),
('METRIC', 'LENGTH', 9, True, False, 1000.000123456789, "1 km 0.123 mm"),
)
def test_units_inputs(self):
# Stolen from FBX addon!
def similar_values(v1, v2, e):
if v1 == v2:
return True
return ((abs(v1 - v2) / max(abs(v1), abs(v2))) <= e)
for usys, utype, ref, inpt, val in self.INPUT_TESTS:
opt_val = units.to_value(usys, utype, inpt, str_ref_unit=ref)
# Note: almostequal is not good here, precision is fixed on decimal digits, not variable with
# magnitude of numbers (i.e. 1609.4416 ~= 1609.4456 fails even at 5 of 'places'...).
self.assertTrue(similar_values(opt_val, val, 1e-7),
msg="%s, %s: \"%s\" (ref: \"%s\") => %f, expected %f"
"" % (usys, utype, inpt, ref, opt_val, val))
def test_units_outputs(self):
for usys, utype, prec, sep, compat, val, output in self.OUTPUT_TESTS:
opt_str = units.to_string(usys, utype, val, precision=prec, split_unit=sep, compatible_unit=compat)
self.assertEqual(
opt_str, output,
msg=(
"%s, %s: %f (precision: %d, separate units: %d, compat units: %d) => "
"\"%s\", expected \"%s\""
) % (usys, utype, val, prec, sep, compat, opt_str, output)
)
if __name__ == '__main__':
import sys
sys.argv = [__file__] + (sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else [])
unittest.main()
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