test_ctbin.py
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#! /usr/bin/env python
# ==========================================================================
# This scripts performs unit tests for the ctbin tool.
#
# Copyright (C) 2014-2016 Juergen Knoedlseder
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# ==========================================================================
import os
import gammalib
import ctools
from testing import test
# ========================= #
# Test class for ctbin tool #
# ========================= #
class Test(test):
"""
Test class for ctbin tool
This test class makes unit tests for the ctbin tool by using it from
the command line and from Python.
"""
# Constructor
def __init__(self):
"""
Constructor
"""
# Call base class constructor
test.__init__(self)
# Return
return
# Set test functions
def set(self):
"""
Set all test functions
"""
# Set test name
self.name('ctbin')
# Append tests
self.append(self._test_cmd, 'Test ctbin on command line')
self.append(self._test_python, 'Test ctbin from Python')
# Return
return
# Test ctbin on command line
def _test_cmd(self):
"""
Test ctbin on the command line
"""
# Set tool name
ctbin = self._tool('ctbin')
# Setup ctbin command
cmd = ctbin+' inobs="'+self._events+'"'+ \
' outcube="cntmap_cmd1.fits"'+\
' emin=0.1 emax=100.0 enumbins=10 ebinalg="LOG"'+ \
' nxpix=40 nypix=40 binsz=0.1 coordsys="CEL"'+ \
' xref=83.63 yref=22.01 proj="CAR"'+ \
' logfile="ctbin_cmd1.log" chatter=1'
# Check if execution of wrong command fails
self.test_assert(self._execute('command_that_does_not_exist') != 0,
'Self test of test script')
# Check if execution was successful
self.test_value(self._execute(cmd), 0,
'Check successful execution from command line')
# Load counts cube and check content.
evt = gammalib.GCTAEventCube('cntmap_cmd1.fits')
self._check_cube(evt, 5542)
# Setup ctbin command
cmd = ctbin+' inobs="events_that_do_not_exist.fits"'+ \
' outcube="cntmap_cmd2.fits"'+\
' emin=0.1 emax=100.0 enumbins=10 ebinalg="LOG"'+ \
' nxpix=40 nypix=40 binsz=0.1 coordsys="CEL"'+ \
' xref=83.63 yref=22.01 proj="CAR"'+ \
' logfile="ctbin_cmd2.log" chatter=1'
# Check if execution failed
self.test_assert(self._execute(cmd) != 0,
'Check invalid input file when executed from command line')
# Setup ctbin command with different ebounds than input
cmd = ctbin+' inobs="'+self._events+'"'+ \
' outcube="cntmap_cmd3.fits"'+\
' emin=0.5 emax=20.0 enumbins=10 ebinalg="LOG"'+ \
' nxpix=40 nypix=40 binsz=0.1 coordsys="CEL"'+ \
' xref=83.63 yref=22.01 proj="CAR"'+ \
' logfile="ctbin_cmd3.log" chatter=3'
# Check if execution was successful
self.test_value(self._execute(cmd), 0,
'Check successful execution from command line')
# Load counts cube and check content.
evt = gammalib.GCTAEventCube('cntmap_cmd3.fits')
self._check_cube(evt, 890)
# Setup ctbin --help option
cmd = ctbin+' --help'
# Check if execution was successful in case that the CTOOLS
# environment variable was set or failed otherwise
if 'CTOOLS' in os.environ:
self.test_value(self._execute(cmd), 0,
'Check successful execution with --help option')
else:
self.test_assert(self._execute(cmd) != 0,
'Check execution failure with --help option')
# Return
return
# Test ctbin from Python
def _test_python(self):
"""
Test ctbin from Python
"""
# Allocate ctbin
bin = ctools.ctbin()
# Check that empty ctbin has an empty observation container and counts
# cube
self.test_value(bin.obs().size(), 0,
'Check that empty ctbin has an empty observation container')
self.test_value(bin.cube().size(), 0,
'Check that empty ctbin has an empty counts cube')
# Check that saving does not nothing
bin['logfile'] = 'ctbin_py0.log'
bin['outcube'] = 'ctbin_py0.fits'
bin.logFileOpen()
bin.save()
self.test_assert(not os.path.isfile('ctbin_py0.fits'),
'Check that no counts cube has been created')
# Check that publishing does not lead to an exception or segfault
bin.publish()
# Check that clearing does not lead to an exception or segfault
bin.clear()
# Now set ctbin parameters
bin['inobs'] = self._events
bin['outcube'] = 'ctbin_py1.fits'
bin['ebinalg'] = 'LOG'
bin['emin'] = 0.1
bin['emax'] = 100.0
bin['enumbins'] = 10
bin['nxpix'] = 40
bin['nypix'] = 40
bin['binsz'] = 0.1
bin['coordsys'] = 'CEL'
bin['proj'] = 'CAR'
bin['xref'] = 83.63
bin['yref'] = 22.01
bin['logfile'] = 'ctbin_py1.log'
bin['chatter'] = 2
# Run ctbin tool
bin.logFileOpen()
bin.run()
# Check content of observation container and counts cube
self._check_observation(bin, 5542)
self._check_cube(bin.cube(), 5542)
# Copy ctbin tool
cpy_bin = bin.copy()
# Check content of observation container and counts cube
self._check_observation(cpy_bin, 5542)
self._check_cube(cpy_bin.cube(), 5542)
# Run copy of ctbin tool again
cpy_bin['logfile'] = 'ctbin_py2.log'
cpy_bin['chatter'] = 3
cpy_bin.logFileOpen()
cpy_bin.run()
# Check content of observation container and counts cube. Now an empty
# event cube is expected since on input the observation is binned, and
# any binned observation will be skipped.
self._check_observation(cpy_bin, 0)
self._check_cube(cpy_bin.cube(), 0)
# Save counts cube
bin.save()
# Load counts cube and check content
evt = gammalib.GCTAEventCube('ctbin_py1.fits')
self._check_cube(evt, 5542)
# Now clear ctbin tool
bin.clear()
# Check that cleared ctbin has an empty observation container and
# counts cube
self.test_value(bin.obs().size(), 0,
'Check that empty ctbin has an empty observation container')
self.test_value(bin.cube().size(), 0,
'Check that empty ctbin has an empty counts cube')
# Prepare observation container for stacking of events into a
# single counts cube
obs = self._obs_events()
# Set-up ctbin using an observation container
bin = ctools.ctbin(obs)
bin['outcube'] = 'ctbin_py3.fits'
bin['ebinalg'] = 'LOG'
bin['emin'] = 0.1
bin['emax'] = 100.0
bin['enumbins'] = 10
bin['nxpix'] = 40
bin['nypix'] = 40
bin['binsz'] = 0.1
bin['coordsys'] = 'CEL'
bin['proj'] = 'CAR'
bin['xref'] = 83.63
bin['yref'] = 22.01
bin['publish'] = True
bin['logfile'] = 'ctbin_py3.log'
bin['chatter'] = 3
# Execute ctbin tool
bin.logFileOpen()
bin.execute()
# Check content of observation and cube (need multiplier=3 since
# three identical observations have been appended)
self._check_observation(bin, 5542, multiplier=3)
self._check_cube(bin.cube(), 5542, multiplier=3)
# Load counts cube and check content.
evt = gammalib.GCTAEventCube('ctbin_py3.fits')
self._check_cube(evt, 5542, multiplier=3)
# And finally go for a fully Pythonic version with all parameters
# being specified in a dictionary
pars = {'inobs': self._events, 'ebinalg': 'LIN', 'emin': 0.1,
'emax': 100.0, 'enumbins': 10, 'nxpix': 40, 'nypix': 40,
'binsz': 0.1, 'coordsys': 'CEL', 'proj': 'CAR',
'xref': 83.63, 'yref': 22.01, 'outcube': 'ctbin_py4.fits',
'logfile': 'ctbin_py4.log', 'chatter': 2}
bin = ctools.ctbin()
bin.pardict(pars)
bin.logFileOpen()
bin.execute()
# Load counts cube and check content
evt = gammalib.GCTAEventCube('ctbin_py4.fits')
self._check_cube(evt, 5542)
# Return
return
# Check observation
def _check_observation(self, ctbin, nevents, multiplier=1):
"""
Check content of an observation
Parameters
----------
ctbin : `~ctools.ctbin`
ctbin instance
nevents : int
Expected number of events
multiplier : float, optional
Ontime and livetime multiplier
"""
# Test observation container
obs = gammalib.GCTAObservation(ctbin.obs()[0])
pnt = obs.pointing()
self.test_value(ctbin.obs().size(), 1,
'Check that there is one observation on the observation container')
self.test_value(obs.instrument(), 'CTA',
'Check that the one observation is a CTA observation')
self.test_value(obs.ontime(), 1800.0*multiplier, 1.0e-6,
'Check ontime of observation')
self.test_value(obs.livetime(), 1710.0*multiplier, 1.0e-6,
'Check livetime of observation')
self.test_value(pnt.dir().ra_deg(), 83.63, 1.0e-6,
'Check pointing Right Ascension of observation')
self.test_value(pnt.dir().dec_deg(), 22.01, 1.0e-6,
'Check pointing Declination of observation')
# Test event cube
self._check_cube(obs.events(), nevents, multiplier=multiplier)
# Return
return
# Check event cube
def _check_cube(self, cube, nevents, multiplier=1):
"""
Check content of event cube
Parameters
----------
cube : `~gammalib.GCTAEventCube`
Event cube
nevents : int
Expected number of events
multiplier : float
Event number multiplier
"""
# Test event cube
self.test_value(cube.size(), 16000,
'Check bin size of counts cube')
self.test_value(cube.number(), nevents*multiplier,
'Check number of events in counts cube')
# Return
return