def test_simple(self, areacella):
area, sic = self.values(areacella)
a = sea_ice_extent(sic, area)
expected = 4 * np.pi * area.r**2 / 2.0
np.testing.assert_array_almost_equal(a / expected, 1, 3)
assert a.units == "m^2"
def test_dimensionless(self, areacella):
area, sic = self.values(areacella)
sic = sic / 100
sic.attrs["units"] = ""
a = sea_ice_extent(sic, area)
expected = 4 * np.pi * area.r**2 / 2.0
np.testing.assert_array_almost_equal(a / expected, 1, 3)
assert a.units == "m^2"
def test_area_units(self, areacella):
area, sic = self.values(areacella)
# Convert area to km^2
area /= 1e6
area.attrs["units"] = "km^2"
a = sea_ice_extent(sic, area)
assert a.units == "km^2"
expected = 4 * np.pi * area.r**2 / 2.0 / 1e6
np.testing.assert_array_almost_equal(a / expected, 1, 3)