# Path: lib/cartopy/tests/crs/helpers.py
# def check_proj_params(name, crs, other_args):
#     expected = other_args | {f'proj={name}', 'no_defs'}
#     proj_params = set(crs.proj4_init.lstrip('+').split(' +'))
#     assert expected == proj_params


import numpy as np
import pytest
import cartopy.crs as ccrs
from numpy.testing import assert_almost_equal
from .helpers import check_proj_params


def test_default():
    eqearth = ccrs.EqualEarth()
    other_args = {'ellps=WGS84', 'lon_0=0'}
    check_proj_params('eqearth', eqearth, other_args)

    assert_almost_equal(eqearth.x_limits,
                        [-17243959.0622169, 17243959.0622169])
    assert_almost_equal(eqearth.y_limits,
                        [-8392927.59846646, 8392927.59846646])
    # Expected aspect ratio from the paper.
    assert_almost_equal(np.diff(eqearth.x_limits) / np.diff(eqearth.y_limits),
                        2.05458, decimal=5)


def test_offset():
    crs = ccrs.EqualEarth()
    crs_offset = ccrs.EqualEarth(false_easting=1234, false_northing=-4321)
    other_args = {'ellps=WGS84', 'lon_0=0', 'x_0=1234', 'y_0=-4321'}
    check_proj_params('eqearth', crs_offset, other_args)
    assert tuple(np.array(crs.x_limits) + 1234) == crs_offset.x_limits
    assert tuple(np.array(crs.y_limits) - 4321) == crs_offset.y_limits


def test_eccentric_globe():
    globe = ccrs.Globe(semimajor_axis=1000, semiminor_axis=500,
                       ellipse=None)
    eqearth = ccrs.EqualEarth(globe=globe)
    other_args = {'a=1000', 'b=500', 'lon_0=0'}

# Path: lib/cartopy/tests/crs/helpers.py
# def check_proj_params(name, crs, other_args):
#     expected = other_args | {f'proj={name}', 'no_defs'}
#     proj_params = set(crs.proj4_init.lstrip('+').split(' +'))
#     assert expected == proj_params


# Path: lib/cartopy/tests/crs/test_equal_earth.py
import numpy as np
import pytest
import cartopy.crs as ccrs
from numpy.testing import assert_almost_equal
from .helpers import check_proj_params



def test_default():
    eqearth = ccrs.EqualEarth()
    other_args = {'ellps=WGS84', 'lon_0=0'}
    check_proj_params('eqearth', eqearth, other_args)

    assert_almost_equal(eqearth.x_limits,
                        [-17243959.0622169, 17243959.0622169])
    assert_almost_equal(eqearth.y_limits,
                        [-8392927.59846646, 8392927.59846646])
    # Expected aspect ratio from the paper.
    assert_almost_equal(np.diff(eqearth.x_limits) / np.diff(eqearth.y_limits),
                        2.05458, decimal=5)


def test_offset():
    crs = ccrs.EqualEarth()
    crs_offset = ccrs.EqualEarth(false_easting=1234, false_northing=-4321)
    other_args = {'ellps=WGS84', 'lon_0=0', 'x_0=1234', 'y_0=-4321'}
    check_proj_params('eqearth', crs_offset, other_args)
    assert tuple(np.array(crs.x_limits) + 1234) == crs_offset.x_limits
    assert tuple(np.array(crs.y_limits) - 4321) == crs_offset.y_limits


def test_eccentric_globe():
    globe = ccrs.Globe(semimajor_axis=1000, semiminor_axis=500,
                       ellipse=None)
    eqearth = ccrs.EqualEarth(globe=globe)
    other_args = {'a=1000', 'b=500', 'lon_0=0'}

    check_proj_params('eqearth', eqearth, other_args)