def test_incorrect_spacing(self):
fl = AngleFormatterLocator()
fl.spacing = 0.032 * u.deg
with pytest.warns(UserWarning,
match=r'Spacing is not a multiple of base spacing'):
fl.format = 'dd:mm:ss'
assert_almost_equal(fl.spacing.to_value(u.arcsec), 115.)
def test_values_unit(self):
# Make sure that the intrinsic unit and format unit are correctly
# taken into account when using the locator
fl = AngleFormatterLocator(unit=u.arcsec,
format_unit=u.arcsec,
decimal=True)
assert_quantity_allclose(
fl.locator(850, 2150)[0],
[1000., 1200., 1400., 1600., 1800., 2000.] * u.arcsec)
fl = AngleFormatterLocator(unit=u.arcsec,
format_unit=u.degree,
decimal=False)
assert_quantity_allclose(
fl.locator(850, 2150)[0], [15., 20., 25., 30., 35.] * u.arcmin)
fl = AngleFormatterLocator(unit=u.arcsec,
format_unit=u.hourangle,
decimal=False)
assert_quantity_allclose(
fl.locator(850, 2150)[0],
[60., 75., 90., 105., 120., 135.] * (15 * u.arcsec))
fl = AngleFormatterLocator(unit=u.arcsec)
fl.format = 'dd:mm:ss'
assert_quantity_allclose(fl.locator(0.9, 1.1)[0], [1] * u.arcsec)
fl = AngleFormatterLocator(unit=u.arcsec, spacing=0.2 * u.arcsec)
assert_quantity_allclose(
fl.locator(0.3, 0.9)[0], [0.4, 0.6, 0.8] * u.arcsec)
def test_decimal_values(self):
# Regression test for a bug that meant that the spacing was not
# determined correctly for decimal coordinates
fl = AngleFormatterLocator()
fl.format = 'd.dddd'
assert_quantity_allclose(fl.locator(266.9730, 266.9750)[0],
[266.9735, 266.9740, 266.9745, 266.9750] * u.deg)
fl = AngleFormatterLocator(decimal=True, format_unit=u.hourangle, number=4)
assert_quantity_allclose(fl.locator(266.9730, 266.9750)[0],
[17.79825, 17.79830] * u.hourangle)
def test_number(self):
fl = AngleFormatterLocator(number=7)
assert fl.values is None
assert fl.number == 7
assert fl.spacing is None
values, spacing = fl.locator(34.3, 55.4)
assert_almost_equal(values.to_value(u.degree), [35., 40., 45., 50., 55.])
values, spacing = fl.locator(34.3, 36.1)
assert_almost_equal(values.to_value(u.degree), [34.5, 34.75, 35., 35.25, 35.5, 35.75, 36.])
fl.format = 'dd'
values, spacing = fl.locator(34.3, 36.1)
assert_almost_equal(values.to_value(u.degree), [35., 36.])
def test_spacing(self):
with pytest.raises(TypeError) as exc:
AngleFormatterLocator(spacing=3.)
assert exc.value.args[0] == "spacing should be an astropy.units.Quantity instance with units of angle"
fl = AngleFormatterLocator(spacing=3. * u.degree)
assert fl.values is None
assert fl.number is None
assert fl.spacing == 3. * u.degree
values, spacing = fl.locator(34.3, 55.4)
assert_almost_equal(values.to_value(u.degree), [36., 39., 42., 45., 48., 51., 54.])
fl.spacing = 30. * u.arcmin
values, spacing = fl.locator(34.3, 36.1)
assert_almost_equal(values.to_value(u.degree), [34.5, 35., 35.5, 36.])
with pytest.warns(UserWarning, match='Spacing is too small'):
fl.format = 'dd'
values, spacing = fl.locator(34.3, 36.1)
assert_almost_equal(values.to_value(u.degree), [35., 36.])
def test_values_unit(self):
# Make sure that the intrinsic unit and format unit are correctly
# taken into account when using the locator
fl = AngleFormatterLocator(unit=u.arcsec, format_unit=u.arcsec, decimal=True)
assert_quantity_allclose(fl.locator(850, 2150)[0],
[1000., 1200., 1400., 1600., 1800., 2000.] * u.arcsec)
fl = AngleFormatterLocator(unit=u.arcsec, format_unit=u.degree, decimal=False)
assert_quantity_allclose(fl.locator(850, 2150)[0],
[15., 20., 25., 30., 35.] * u.arcmin)
fl = AngleFormatterLocator(unit=u.arcsec, format_unit=u.hourangle, decimal=False)
assert_quantity_allclose(fl.locator(850, 2150)[0],
[60., 75., 90., 105., 120., 135.] * (15 * u.arcsec))
fl = AngleFormatterLocator(unit=u.arcsec)
fl.format = 'dd:mm:ss'
assert_quantity_allclose(fl.locator(0.9, 1.1)[0], [1] * u.arcsec)
fl = AngleFormatterLocator(unit=u.arcsec, spacing=0.2 * u.arcsec)
assert_quantity_allclose(fl.locator(0.3, 0.9)[0], [0.4, 0.6, 0.8] * u.arcsec)
def test_invalid_formats(self, format):
fl = AngleFormatterLocator(number=5)
with pytest.raises(ValueError) as exc:
fl.format = format
assert exc.value.args[0] == "Invalid format: " + format
def test_incorrect_spacing(self):
fl = AngleFormatterLocator()
fl.spacing = 0.032 * u.deg
with pytest.warns(UserWarning, match='Spacing is not a multiple of base spacing'):
fl.format = 'dd:mm:ss'
assert_almost_equal(fl.spacing.to_value(u.arcsec), 115.)
def test_invalid_formats(self, format):
fl = AngleFormatterLocator(number=5)
with pytest.raises(ValueError) as exc:
fl.format = format
assert exc.value.args[0] == "Invalid format: " + format