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# * Copyright (c) 2010 Juergen Riegel <juergen.riegel@web.de> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * FreeCAD is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with FreeCAD; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************/
import FreeCAD
import unittest
import math
def tu(str):
return FreeCAD.Units.Quantity(str).Value
def ts(q):
return q.UserString
def ts2(q):
return FreeCAD.Units.Quantity(q.UserString).UserString
# ---------------------------------------------------------------------------
# define the functions to test the FreeCAD UnitApi code
# ---------------------------------------------------------------------------
def compare(x, y):
return math.fabs(x - y) < 0.00001
class UnitBasicCases(unittest.TestCase):
def setUp(self):
par = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Units")
dec = par.GetInt("Decimals")
self.delta = math.pow(10, -dec)
def testConversions(self):
# tu = FreeCAD.Units.translateUnit
self.assertTrue(compare(tu("10 m"), 10000.0))
self.assertTrue(compare(tu("3/8 in"), 9.525))
self.assertTrue(compare(tu("100 km/h"), 27777.77777777))
self.assertTrue(compare(tu("m^2*kg*s^-3*A^-2"), 1000000.0))
self.assertTrue(compare(tu("(m^2*kg)/(A^2*s^3)"), 1000000.0))
self.assertTrue(compare(tu("2*pi rad"), 360.0))
self.assertTrue(compare(tu("2*pi rad") / tu("gon"), 400.0))
self.assertTrue(compare(tu("999 kg") / tu("1 m^3"), 0.000009999))
def testImperial(self):
# tu = FreeCAD.Units.translateUnit
self.assertTrue(compare(tu("3/8in"), 9.525))
# self.assertTrue(compare(tu('1fo(3+7/16)in'),392.112500))thisgivesaparsersyntaxerror!!!
self.assertTrue(compare(tu("1'(3+7/16)\""), 392.112500))
psi = FreeCAD.Units.parseQuantity("1psi")
mpa = psi.getValueAs("MPa").Value
self.assertAlmostEqual(0.0068947572932, mpa, delta=self.delta)
kpa = psi.getValueAs("kPa").Value
self.assertAlmostEqual(6.8947572932, kpa, delta=self.delta)
ksi = FreeCAD.Units.parseQuantity("1ksi")
mpa = ksi.getValueAs("MPa").Value
self.assertAlmostEqual(6.8947572931783, mpa, delta=self.delta)
kpa = ksi.getValueAs("kPa").Value
self.assertAlmostEqual(6894.7572931783, kpa, delta=self.delta)
def testSelfConsistency(self):
qu = FreeCAD.Units.Quantity("0.23 W/m/K")
self.assertTrue(ts(qu), ts2(qu))
qu = FreeCAD.Units.Quantity("237 mm*kg/(s^3*K)")
self.assertTrue(ts(qu), ts2(qu))
qu = FreeCAD.Units.Quantity("237.000 W/mm/K")
self.assertTrue(ts(qu), ts2(qu))
def testDivide(self):
qu1 = FreeCAD.Units.Quantity("1 m/s")
qu2 = FreeCAD.Units.Quantity("m/s")
self.assertTrue(qu1 / qu2, 1)
def testSchemas(self):
schemas = FreeCAD.Units.listSchemas()
num = len(schemas)
psi = FreeCAD.Units.parseQuantity("1psi")
for i in range(num):
t = FreeCAD.Units.schemaTranslate(psi, i)
v = FreeCAD.Units.parseQuantity(t[0]).getValueAs("psi")
self.assertAlmostEqual(
1,
v.Value,
msg='Failed with "{0}" scheme: {1} != 1 (delta: {2})'.format(
schemas[i], v.Value, self.delta
),
delta=self.delta,
)
ksi = FreeCAD.Units.parseQuantity("1ksi")
for i in range(num):
t = FreeCAD.Units.schemaTranslate(ksi, i)
v = FreeCAD.Units.parseQuantity(t[0]).getValueAs("ksi")
self.assertAlmostEqual(
1,
v.Value,
msg='Failed with "{0}" scheme: {1} != 1 (delta: {2})'.format(
schemas[i], v.Value, self.delta
),
delta=self.delta,
)
vacuum_permittivity = FreeCAD.Units.parseQuantity("1F/m")
vacuum_permittivity.Format = {"NumberFormat": FreeCAD.Units.NumberFormat.Scientific}
for i in range(num):
t = FreeCAD.Units.schemaTranslate(vacuum_permittivity, i)
v = FreeCAD.Units.parseQuantity(t[0]).getValueAs("F/m")
self.assertAlmostEqual(
1,
v.Value,
msg='Failed with "{0}" scheme: {1} != 1 (delta: {2})'.format(
schemas[i], v.Value, self.delta
),
delta=self.delta,
)
def testSchemeTranslation(self):
quantities = []
for i in dir(FreeCAD.Units):
if issubclass(type(getattr(FreeCAD.Units, i)), FreeCAD.Units.Quantity):
quantities.append(i)
schemas = FreeCAD.Units.listSchemas()
for i in quantities:
q1 = getattr(FreeCAD.Units, i)
q1 = FreeCAD.Units.Quantity(q1)
q1.Format = {"Precision": 16}
for idx, val in enumerate(schemas):
[t, amountPerUnit, unit] = FreeCAD.Units.schemaTranslate(q1, idx)
try:
q2 = FreeCAD.Units.Quantity(t)
if math.fabs(q1.Value - q2.Value) > 0.01:
print(
" {} : {} : {} : {} : {}".format(q1, q2, t, i, val)
.encode("utf-8")
.strip()
)
except Exception as e:
print("{} : {} : {} : {}".format(q1, i, val, e).encode("utf-8").strip())
def testVoltage(self):
q1 = FreeCAD.Units.Quantity("1e20 V")
t = FreeCAD.Units.schemaTranslate(q1, 0) # Standard
q2 = FreeCAD.Units.Quantity(t[0])
self.assertAlmostEqual(q1.Value, q2.Value, delta=self.delta)
def testEnergy(self):
q1 = FreeCAD.Units.Quantity("1e20 J")
t = FreeCAD.Units.schemaTranslate(q1, 0) # Standard
q2 = FreeCAD.Units.Quantity(t[0])
self.assertAlmostEqual(q1.Value, q2.Value, delta=self.delta)
def testTrigonometric(self):
# tu=FreeCAD.Units.translateUnit
self.assertTrue(compare(tu("sin(pi)"), math.sin(math.pi)))
self.assertTrue(compare(tu("cos(pi)"), math.cos(math.pi)))
self.assertTrue(compare(tu("tan(pi)"), math.tan(math.pi)))
def testQuantity(self):
length = FreeCAD.Units.Quantity(1, "m")
self.assertEqual(length.Value, 1000)
self.assertEqual(length.Unit, FreeCAD.Units.Length)
def testToString(self):
value = FreeCAD.Units.toNumber(1023, "g", 2)
self.assertEqual(float(value), 1000)
value = FreeCAD.Units.toNumber(1023, "g", 3)
self.assertEqual(float(value), 1020)
value = FreeCAD.Units.toNumber(1023, "f", 2)
self.assertEqual(float(value), 1023)
value = FreeCAD.Units.toNumber(1023, "e", 1)
self.assertEqual(float(value), 1000)
value = FreeCAD.Units.toNumber(1023, "e", 2)
self.assertEqual(float(value), 1020)
value = FreeCAD.Units.toNumber(1023, "e", 3)
self.assertEqual(float(value), 1023)
q = FreeCAD.Units.Quantity("1023")
value = FreeCAD.Units.toNumber(q, "f", 2)
self.assertEqual(float(value), 1023)
with self.assertRaises(TypeError):
FreeCAD.Units.toNumber("1023", "g", 2)
with self.assertRaises(ValueError):
FreeCAD.Units.toNumber(1023, "gg", 2)
with self.assertRaises(ValueError):
FreeCAD.Units.toNumber(1023, "s", 2)
def testIssue6735(self):
FreeCAD.Units.Quantity("1400.0 N/mm^2")
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