def test_returns_same_results_when_turned_30_degrees(self, atmo_yaml_dict):
atmo_yaml_dict["properties"]["pupil_angle"] = 30
atmo_disp = AtmosphericDispersion(**atmo_yaml_dict["properties"])
waves, dx, dy = atmo_disp.fov_grid()
dr = ((dx[0] - dx[-1])**2 + (dy[0] - dy[-1])**2)**0.5
assert dr == approx(0.53, rel=1e-2)
def test_returns_similar_values_to_lasilla_website(self, atmo_yaml_dict):
atmo_disp = AtmosphericDispersion(**atmo_yaml_dict["properties"])
waves, dx, dy = atmo_disp.fov_grid()
assert dy[0] - dy[-1] == approx(0.53, rel=1e-2)
assert all(dx == 0)
assert waves[0] == 0.5 and waves[-1] == 2.5
def test_returns_same_results_when_turned_90_degrees(self, atmo_yaml_dict):
atmo_yaml_dict["properties"]["pupil_angle"] = 90
atmo_disp = AtmosphericDispersion(**atmo_yaml_dict["properties"])
waves, dx, dy = atmo_disp.fov_grid()
assert dx[0] - dx[-1] == approx(0.53, rel=1e-2)
assert all([y == approx(0) for y in dy])
def test_returns_non_with_wrong_which_keyword(self, atmo_yaml_dict):
atmo_disp = AtmosphericDispersion(**atmo_yaml_dict["properties"])
response = atmo_disp.fov_grid(which="bogus")
assert response is None
def test_returns_list_of_3_arrays_with_correct_which(self, atmo_yaml_dict):
atmo_disp = AtmosphericDispersion(**atmo_yaml_dict["properties"])
response = atmo_disp.fov_grid()
assert len(response) == 3
assert all([isinstance(x, np.ndarray) for x in response])
def test_throws_error_if_one_keyword_missing(self, atmo_yaml_dict):
kwargs_dict = atmo_yaml_dict["properties"]
kwargs_dict.pop("airmass")
with pytest.raises(ValueError):
isinstance(AtmosphericDispersion(), AtmosphericDispersion)
def test_passes_if_all_keywords_are_present(self, atmo_yaml_dict):
kwargs_dict = atmo_yaml_dict["properties"]
atmo_disp = AtmosphericDispersion(**kwargs_dict)
assert isinstance(atmo_disp, AtmosphericDispersion)
def test_throws_error_when_initialised_with_nothing(self):
with pytest.raises(ValueError):
isinstance(AtmosphericDispersion(), AtmosphericDispersion)