def test_convert_sequence(self):
m = Unit('m')
ft = Unit('ft')
m2ft = m.get_converter(ft)
assert '3.28084*x' == m2ft.get_expression()
ft2m = Converter('ft',m)
assert '0.3048*a' == ft2m.get_expression('a')
sqm2sqft = (m*m).get_converter((ft*ft))
assert '10.7639*x' == sqm2sqft.get_expression()
inarr = np.array([2.8, 3.5, 19.2, 312])
# Verify output of m2ft is what we expect
outarr = m2ft(inarr)
np.testing.assert_array_almost_equal(outarr, np.array([9.186352, 11.48294, 62.992128, 1023.62208]), decimal=6)
# Verify output of ft2m is what we expect
outarr = ft2m(inarr)
np.testing.assert_array_almost_equal(outarr, np.array([0.85344, 1.0668 , 5.85216, 95.0976]), decimal=5)
outarr = sqm2sqft(inarr)
np.testing.assert_array_almost_equal(outarr, np.array([30.13892, 37.67365, 206.66688, 3358.3368]), decimal=5)
with pytest.raises(TypeError):
m.get_converter(None)
def test_equivalence(self):
m = Unit('m')
m_ = Unit('m')
assert m == m_
assert Unit('km2/s') == Unit('km2.s-1') == Unit('km2 s-1')
def test_convert_single(self):
k = Unit('K')
c = Unit('deg_c')
k2c = k.get_converter(c)
np.testing.assert_almost_equal(k2c(23.5), -249.65, decimal=2)
np.testing.assert_almost_equal(k2c(288.2), 15.05, decimal=2)
np.testing.assert_almost_equal(k2c(273.15), 0.0, decimal=1)
def test_convert_single(self):
k = Unit('K')
c = Unit('deg_c')
k2c = k.get_converter(c)
np.testing.assert_almost_equal(k2c(23.5), -249.65, decimal=2)
np.testing.assert_almost_equal(k2c(288.2), 15.05, decimal=2)
np.testing.assert_almost_equal(k2c(273.15), 0.0, decimal=1)
def test_combination(self):
m = Unit('m')
m_ = Unit('m')
m2 = m * m_
assert m2 == Unit('m2')
assert m2 == pow(m, 2)
s = Unit('s')
ms = m / s
assert ms == Unit('m/s')
def test_log(self):
# Using milliwatt example from:
# http://www.unidata.ucar.edu/software/udunits/udunits-2/udunits2lib.html#index-ut_005flog-65
mW=Unit('milliWatt')
bel_1_mW = mW.log(10)
assert str(bel_1_mW) == 'lg(re 0.001 W)'
decibel_1_mW = bel_1_mW * 0.1
assert str(decibel_1_mW) == '0.1 lg(re 0.001 W)'
def test_log(self):
# Using milliwatt example from:
# http://www.unidata.ucar.edu/software/udunits/udunits-2/udunits2lib.html#index-ut_005flog-65
mW = Unit('milliWatt')
bel_1_mW = mW.log(10)
assert str(bel_1_mW) == 'lg(re 0.001 W)'
decibel_1_mW = bel_1_mW * 0.1
assert str(decibel_1_mW) == '0.1 lg(re 0.001 W)'
def test_errors(self):
s = Unit('s')
min = Unit('min')
s2min = s.get_converter(min)
with pytest.raises(TypeError):
s2min.combine('10')
with pytest.raises(TypeError):
Converter(s, None)
with pytest.raises(TypeError):
fake = object
fake.this = None
Converter(s, fake)
def test_errors(self):
s = Unit('s')
min = Unit('min')
s2min = s.get_converter(min)
with pytest.raises(TypeError):
s2min.combine('10')
with pytest.raises(TypeError):
Converter(s, None)
with pytest.raises(TypeError):
fake = object
fake.this = None
Converter(s, fake)
def test_offset(self):
k = Unit('K')
# Celsius should be Kelvin - 273.15
c = k - 273.15
assert c == Unit('deg_c')
# Adding 273.15 should bring us back to kelvin
k_ = c + 273.15
assert k == k_
# Use offsets to go from m to km and cm
m = Unit('m')
assert m * 1000 == Unit('km')
assert m / 100 == Unit('cm')
assert str(-m) == '-1 m'
def test_combine_converters(self):
s = Unit('s')
min = Unit('min')
hr = Unit('hr')
s2min = s.get_converter(min)
min2hr = min.get_converter(hr)
s2hr = s.get_converter(hr)
s2min2hr = s2min.combine(min2hr)
assert s2hr.get_expression('x') == s2min2hr.get_expression('x')
np.testing.assert_almost_equal(min2hr(s2min.evaluate(10)), s2min2hr(10), decimal=7)
with pytest.raises(TypeError):
s2min.combine('10')
def test_errors(self):
with pytest.raises(UdunitsError) as ex:
Unit('no-exist-unit')
assert ex.message.contains('UT_UNKNOWN')
m = Unit('m')
with pytest.raises(NotImplementedError):
m.map_to_name('blah')
with pytest.raises(NotImplementedError):
m.unmap_to_name('blah')
with pytest.raises(NotImplementedError):
m.map_name_to('blah')
with pytest.raises(NotImplementedError):
m.unmap_name_to('blah')
def test_convert_sequence(self):
m = Unit('m')
ft = Unit('ft')
m2ft = m.get_converter(ft)
assert '3.28084*x' == m2ft.get_expression()
ft2m = Converter('ft', m)
assert '0.3048*a' == ft2m.get_expression('a')
sqm2sqft = (m * m).get_converter((ft * ft))
assert '10.7639*x' == sqm2sqft.get_expression()
inarr = np.array([2.8, 3.5, 19.2, 312])
# Verify output of m2ft is what we expect
outarr = m2ft(inarr)
np.testing.assert_array_almost_equal(
outarr,
np.array([9.186352, 11.48294, 62.992128, 1023.62208]),
decimal=6)
# Verify output of ft2m is what we expect
outarr = ft2m(inarr)
np.testing.assert_array_almost_equal(
outarr, np.array([0.85344, 1.0668, 5.85216, 95.0976]), decimal=5)
outarr = sqm2sqft(inarr)
np.testing.assert_array_almost_equal(
outarr,
np.array([30.13892, 37.67365, 206.66688, 3358.3368]),
decimal=5)
with pytest.raises(TypeError):
m.get_converter(None)
def test_are_convertible(self):
m = Unit('m')
ft = Unit('ft')
s = Unit('s')
# True from a unit
assert m.are_convertible(ft) == True
# True from a str
assert m.are_convertible('ft') == True
# False from a unit
assert m.are_convertible(s) == False
# False from a str
assert m.are_convertible('s') == False
# A sequence
assert m.are_convertible([ft,'s']) == [True, False]
with pytest.raises(TypeError):
m.are_convertible(None)
def test_combine_converters(self):
s = Unit('s')
min = Unit('min')
hr = Unit('hr')
s2min = s.get_converter(min)
min2hr = min.get_converter(hr)
s2hr = s.get_converter(hr)
s2min2hr = s2min.combine(min2hr)
assert s2hr.get_expression('x') == s2min2hr.get_expression('x')
np.testing.assert_almost_equal(min2hr(s2min.evaluate(10)),
s2min2hr(10),
decimal=7)
with pytest.raises(TypeError):
s2min.combine('10')
def test_create(self):
day = Unit('day')
yr = Unit('yr')
day2yr = Converter(day, yr)
assert day2yr.get_expression() == '0.00273791*x'
def test_create(self):
m = Unit('m')
assert isinstance(m, Unit)
assert str(m) == 'meter'
def test_copy(self):
pa = Unit('pa')
pac = pa.copy()
assert pa == pac
def test_errors(self):
with pytest.raises(UdunitsError) as ex:
Unit('no-exist-unit')
assert ex.message.contains('UT_UNKNOWN')
m = Unit('m')
with pytest.raises(NotImplementedError):
m.map_to_name('blah')
with pytest.raises(NotImplementedError):
m.unmap_to_name('blah')
with pytest.raises(NotImplementedError):
m.map_name_to('blah')
with pytest.raises(NotImplementedError):
m.unmap_name_to('blah')
def test_copy(self):
pa = Unit('pa')
pac = pa.copy()
assert pa == pac
def test_are_convertible(self):
m = Unit('m')
ft = Unit('ft')
s = Unit('s')
# True from a unit
assert m.are_convertible(ft) == True
# True from a str
assert m.are_convertible('ft') == True
# False from a unit
assert m.are_convertible(s) == False
# False from a str
assert m.are_convertible('s') == False
# A sequence
assert m.are_convertible([ft, 's']) == [True, False]
with pytest.raises(TypeError):
m.are_convertible(None)
def test_system(self):
s = DEFAULT_SYSTEM
assert s.get_unit_by_name('meter') == Unit('m')
assert s.get_unit_by_symbol('ft') == Unit('ft')
assert s.get_dimensionless_unit_one() == Unit('1')
def test_pow(self):
m = Unit('m')
m2 = Unit('m2')
assert m2 == pow(m, 2)
def test_invert(self):
m = Unit('m')
s = Unit('s')
assert Unit('m/s') == m * s.invert() == m / s
def test_invert(self):
m = Unit('m')
s = Unit('s')
assert Unit('m/s') == m * s.invert() == m / s
def test_root(self):
m = Unit('m')
m2 = pow(m, 2)
assert m2.root(1) == m2
assert m2.root(2) == m
def get_unit(self, uom):
return Unit(uom, system=self.system)
def test_same_system(self):
assert Unit('m').same_system(Unit('ft'))
