def test_coord_promotion_missing_scalar(self):
"""Test case in which a scalar coordinate has been lost from new_cube,
meaning the cube undergoing checking ends up with different dimension
coordinates to the progenitor cube. This raises an error."""
cube = set_up_cube()
new_cube = iris.util.squeeze(cube)
new_cube.remove_coord('realization')
msg = 'Returned cube dimension coordinates'
with self.assertRaisesRegexp(iris.exceptions.CoordinateNotFoundError,
msg):
Utilities.check_cube_coordinates(cube, new_cube)
def test_coord_promotion(self):
"""Test that scalar coordinates in new_cube are promoted to dimension
coordinates to match the parent cube."""
cube = set_up_cube()
new_cube = iris.util.squeeze(cube)
result = Utilities.check_cube_coordinates(cube, new_cube)
self.assertEqual(result.dim_coords, cube.dim_coords)
def test_coord_promotion_and_reordering(self):
"""Test case in which a scalar coordinate are promoted but the order
must be corrected to match the progenitor cube."""
cube = set_up_cube()
new_cube = iris.util.squeeze(cube)
cube.transpose(new_order=[1, 0, 2, 3])
result = Utilities.check_cube_coordinates(cube, new_cube)
self.assertEqual(result.dim_coords, cube.dim_coords)
def test_coord_promotion_only_dim_coords_in_parent(self):
"""Test that only dimension coordinates in the parent cube are matched
when promoting the scalar coordinates in new_cube. Here realization is
made into a scalar coordinate on the parent, and so should remain a
scalar in new_cube as well."""
cube = set_up_cube()
new_cube = iris.util.squeeze(cube)
cube = cube[0]
result = Utilities.check_cube_coordinates(cube, new_cube)
self.assertEqual(result.dim_coords, cube.dim_coords)
def test_basic(self):
"""Test returns iris.cube.Cube."""
cube = set_up_cube()
result = Utilities.check_cube_coordinates(cube, cube)
self.assertIsInstance(result, Cube)