test_fhd_cal.py
# -*- mode: python; coding: utf-8 -*-
# Copyright (c) 2018 Radio Astronomy Software Group
# Licensed under the 2-clause BSD License
"""Tests for FHD_cal object."""
from __future__ import absolute_import, division, print_function
import pytest
import os
import numpy as np
from pyuvdata import UVCal
import pyuvdata.tests as uvtest
from pyuvdata.data import DATA_PATH
# set up FHD file list
testdir = os.path.join(DATA_PATH, 'fhd_cal_data/')
testfile_prefix = '1061316296_'
obs_testfile = os.path.join(testdir, testfile_prefix + 'obs.sav')
cal_testfile = os.path.join(testdir, testfile_prefix + 'cal.sav')
settings_testfile = os.path.join(testdir, testfile_prefix + 'settings.txt')
def test_ReadFHDcalWriteReadcalfits():
"""
FHD cal to calfits loopback test.
Read in FHD cal files, write out as calfits, read back in and check for
object equality.
"""
fhd_cal = UVCal()
calfits_cal = UVCal()
fhd_cal.read_fhd_cal(cal_testfile, obs_testfile,
settings_file=settings_testfile)
assert np.max(fhd_cal.gain_array) < 2.
outfile = os.path.join(DATA_PATH, 'test/outtest_FHDcal_1061311664.calfits')
fhd_cal.write_calfits(outfile, clobber=True)
calfits_cal.read_calfits(outfile)
assert fhd_cal == calfits_cal
# do it again with fit gains (rather than raw)
fhd_cal.read_fhd_cal(cal_testfile, obs_testfile,
settings_file=settings_testfile, raw=False)
outfile = os.path.join(DATA_PATH, 'test/outtest_FHDcal_1061311664.calfits')
fhd_cal.write_calfits(outfile, clobber=True)
calfits_cal.read_calfits(outfile)
assert fhd_cal == calfits_cal
def test_extra_history():
"""Test that setting the extra_history keyword works."""
fhd_cal = UVCal()
calfits_cal = UVCal()
extra_history = 'Some extra history for testing\n'
fhd_cal.read_fhd_cal(cal_testfile, obs_testfile,
settings_file=settings_testfile,
extra_history=extra_history)
outfile = os.path.join(DATA_PATH, 'test/outtest_FHDcal_1061311664.calfits')
fhd_cal.write_calfits(outfile, clobber=True)
calfits_cal.read_calfits(outfile)
assert fhd_cal == calfits_cal
assert extra_history in fhd_cal.history
# try again with a list of history strings
extra_history = ['Some extra history for testing',
'And some more history as well']
fhd_cal.read_fhd_cal(cal_testfile, obs_testfile,
settings_file=settings_testfile,
extra_history=extra_history)
outfile = os.path.join(DATA_PATH, 'test/outtest_FHDcal_1061311664.calfits')
fhd_cal.write_calfits(outfile, clobber=True)
calfits_cal.read_calfits(outfile)
assert fhd_cal == calfits_cal
for line in extra_history:
assert line in fhd_cal.history
def test_flags_galaxy():
"""Test files with time, freq and tile flags and galaxy models behave."""
testdir = os.path.join(DATA_PATH, 'fhd_cal_data/flag_set')
obs_testfile_flag = os.path.join(testdir, testfile_prefix + 'obs.sav')
cal_testfile_flag = os.path.join(testdir, testfile_prefix + 'cal.sav')
settings_testfile_flag = os.path.join(testdir,
testfile_prefix + 'settings.txt')
fhd_cal = UVCal()
calfits_cal = UVCal()
fhd_cal.read_fhd_cal(cal_testfile_flag, obs_testfile_flag,
settings_file=settings_testfile_flag)
outfile = os.path.join(DATA_PATH, 'test/outtest_FHDcal_1061311664.calfits')
fhd_cal.write_calfits(outfile, clobber=True)
calfits_cal.read_calfits(outfile)
assert fhd_cal == calfits_cal
def test_breakReadFHDcal():
"""Try various cases of missing files."""
fhd_cal = UVCal()
pytest.raises(TypeError, fhd_cal.read_fhd_cal, cal_testfile) # Missing obs
uvtest.checkWarnings(fhd_cal.read_fhd_cal, [cal_testfile, obs_testfile],
message=['No settings file'])
# Check only pyuvdata version history with no settings file
assert fhd_cal.history == '\n' + fhd_cal.pyuvdata_version_str
def test_read_multi():
"""Test reading in multiple files."""
testdir2 = os.path.join(DATA_PATH, 'fhd_cal_data/set2')
obs_testfile_list = [obs_testfile,
os.path.join(testdir2, testfile_prefix + 'obs.sav')]
cal_testfile_list = [cal_testfile,
os.path.join(testdir2, testfile_prefix + 'cal.sav')]
settings_testfile_list = [settings_testfile,
os.path.join(testdir2,
testfile_prefix + 'settings.txt')]
fhd_cal = UVCal()
calfits_cal = UVCal()
uvtest.checkWarnings(fhd_cal.read_fhd_cal, func_args=[cal_testfile_list,
obs_testfile_list],
func_kwargs={'settings_file': settings_testfile_list},
message='UVParameter diffuse_model does not match')
outfile = os.path.join(DATA_PATH, 'test/outtest_FHDcal_1061311664.calfits')
fhd_cal.write_calfits(outfile, clobber=True)
calfits_cal.read_calfits(outfile)
assert fhd_cal == calfits_cal
def test_break_read_multi():
"""Test errors for different numbers of files."""
testdir2 = os.path.join(DATA_PATH, 'fhd_cal_data/set2')
obs_testfile_list = [obs_testfile,
os.path.join(testdir2, testfile_prefix + 'obs.sav')]
cal_testfile_list = [cal_testfile,
os.path.join(testdir2, testfile_prefix + 'cal.sav')]
settings_testfile_list = [settings_testfile,
os.path.join(testdir2,
testfile_prefix + 'settings.txt')]
fhd_cal = UVCal()
pytest.raises(ValueError, fhd_cal.read_fhd_cal, cal_testfile_list,
obs_testfile_list[0], settings_file=settings_testfile_list)
pytest.raises(ValueError, fhd_cal.read_fhd_cal, cal_testfile_list,
obs_testfile_list, settings_file=settings_testfile_list[0])
pytest.raises(ValueError, fhd_cal.read_fhd_cal, cal_testfile_list,
obs_testfile_list + obs_testfile_list,
settings_file=settings_testfile_list)
pytest.raises(ValueError, fhd_cal.read_fhd_cal, cal_testfile_list,
obs_testfile_list, settings_file=settings_testfile_list
+ settings_testfile_list)
pytest.raises(ValueError, fhd_cal.read_fhd_cal, cal_testfile_list[0],
obs_testfile_list, settings_file=settings_testfile_list[0])
pytest.raises(ValueError, fhd_cal.read_fhd_cal, cal_testfile_list[0],
obs_testfile_list[0], settings_file=settings_testfile_list)