Simon Bonnefoy / ctools

test_cscript.py 26.4 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 
#! /usr/bin/env python
# ==========================================================================
# This scripts performs unit tests for the cspull script.
#
# Copyright (C) 2016-2017 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 gammalib
import ctools
from testing import test


# ================== #
# cscript_test class #
# ================== #
class cscript_test(ctools.cscript):
    """
    Test class for the cscript base class
    """
    # Constructor
    def __init__(self, *argv):
        """
        Constructor
        """
        # Initialise application by calling the base class constructor
        self._init_cscript(self.__class__.__name__, ctools.__version__, argv)

        # Return
        return

    # Check setup_observations() method
    def check_setup_observations(self, filename, events=True, cube=True):
        self.pars()['inobs'].value(filename)
        obs = gammalib.GObservations()
        self._setup_observations(obs, False, events, cube)
        return

    # Check setup_models() method
    def check_setup_models(self):
        obs = gammalib.GObservations()
        self._setup_models(obs)
        return

    # Check create_ebounds() method
    def check_create_ebounds(self, filename):
        self.pars()['ebinfile'].value(filename)
        return self._create_ebounds()

    # Check require_inobs() method
    def check_require_inobs(self, filename):
        self.pars()['inobs'].value(filename)
        self._require_inobs('check_require_inobs')
        return

    # Check require_inobs_nocube() method
    def check_require_inobs_nocube(self, filename):
        self.pars()['inobs'].value(filename)
        self._require_inobs_nocube('check_require_inobs_nocube')
        return

    # Check get_roi() method
    def check_get_roi(self):
        pnt = gammalib.GCTAPointing()
        return self._get_roi(pnt)

    # Check restore_edisp() method
    def check_restore_edisp(self):
        obs   = gammalib.GObservations()
        edisp = [True, True]
        self._restore_edisp(obs, edisp)
        return

    # Check set_obs_bounds() method
    def check_set_obs_bounds(self):
        obs    = gammalib.GObservations()
        events = gammalib.GCTAEventList()
        cta    = gammalib.GCTAObservation()
        cta.events(events)
        obs.append(cta)
        self._set_obs_bounds(obs)
        return obs.copy()

    # Check get_mean_pointing() method
    def check_get_mean_pointing(self):
        obs = gammalib.GObservations()
        return self._get_mean_pointing(obs)

    # Check set_obs_response() method
    def check_set_obs_response(self, expcube, psfcube, bkgcube, edispcube, edisp):
        obs    = gammalib.GCTAObservation()
        counts = gammalib.GCTAEventCube()
        obs.events(counts)
        self.pars()['expcube'].value(expcube)
        self.pars()['psfcube'].value(psfcube)
        self.pars()['bkgcube'].value(bkgcube)
        self.pars()['edispcube'].value(edispcube)
        self.pars()['edisp'].value(edisp)
        self._set_obs_response(obs)
        return

    # Check get_current_rss() method
    def check_get_current_rss(self):
        return self._get_current_rss()

    # Check is_valid_filename() method
    def check_is_valid_filename(self, filename):
        return self._is_valid_filename(gammalib.GFilename(filename))

    # Check save_event_list() method
    def check_save_event_list(self, infile, evtname, gtiname, outfile):
        obs    = gammalib.GCTAObservation()
        events = gammalib.GCTAEventList()
        obs.events(events)
        obs.save(infile, True)
        self._save_event_list(obs, infile, evtname, gtiname, outfile)
        return

    # Check warn_xml_suffix() method
    def check_warn_xml_suffix(self, filename):
        return self._warn_xml_suffix(gammalib.GFilename(filename))


# ======================== #
# ctobservation_test class #
# ======================== #
class ctobservation_test(ctools.csobservation):
    """
    Test class for the ctobservation base class
    """
    # Constructor
    def __init__(self, *argv):
        """
        Constructor
        """
        # Initialise application by calling the appropriate class constructor
        self._init_csobservation(self.__class__.__name__, ctools.__version__, argv)

        # Return
        return

    # Check first_unbinned_observation() method
    def check_first_unbinned_observation(self):
        return self._first_unbinned_observation()

    # Check next_unbinned_observation() method
    def check_next_unbinned_observation(self):
        return self._next_unbinned_observation()

    # Check set_obs_statistic() method for unbinned observation
    def check_set_obs_statistic_unbinned(self, statistic):
        obs    = gammalib.GObservations()
        events = gammalib.GCTAEventList()
        cta    = gammalib.GCTAObservation()
        cta.events(events)
        obs.append(cta)
        self.obs(obs)
        self._set_obs_statistic(statistic)
        return gammalib.toupper(self.obs()[0].statistic())

    # Check set_obs_statistic() method for binned observation
    def check_set_obs_statistic_binned(self, statistic):
        obs  = gammalib.GObservations()
        cube = gammalib.GCTAEventCube()
        cta  = gammalib.GCTAObservation()
        cta.events(cube)
        obs.append(cta)
        self.obs(obs)
        self._set_obs_statistic(statistic)
        return gammalib.toupper(self.obs()[0].statistic())

    # Check set_obs_statistic() method for On/Off observation
    def check_set_obs_statistic_onoff(self, statistic):
        obs = gammalib.GObservations()
        cta = gammalib.GCTAOnOffObservation()
        obs.append(cta)
        self.obs(obs)
        self._set_obs_statistic(statistic)
        return gammalib.toupper(self.obs()[0].statistic())


# ======================= #
# ctlikelihood_test class #
# ======================= #
class ctlikelihood_test(ctools.cslikelihood):
    """
    Test class for the ctlikelihood base class
    """
    # Constructor
    def __init__(self, *argv):
        """
        Constructor
        """
        # Initialise application by calling the appropriate class constructor
        self._init_cslikelihood(self.__class__.__name__, ctools.__version__, argv)

        # Return
        return

    # Check evaluate() method
    def check_evaluate(self, value):
        par = gammalib.GModelPar()
        par.value(2.0)
        par.range(1.0, 3.0)
        return self._evaluate(par, value)


# ============================ #
# Test class for base classes  #
# ============================ #
class Test(test):
    """
    Test class for base classes
    """
    # Constructor
    def __init__(self):
        """
        Constructor
        """
        # Call base class constructor
        test.__init__(self)

        # Create parameter file for cscript_test application
        pars = gammalib.GApplicationPars()
        pars.append(gammalib.GApplicationPar('inobs','f','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('inmodel','f','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('ebinalg','s','h','FILE','','',''))
        pars.append(gammalib.GApplicationPar('ebinfile','f','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('ra','r','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('dec','r','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('rad','r','h','1.0','','',''))
        pars.append(gammalib.GApplicationPar('emin','r','h','1.0','','',''))
        pars.append(gammalib.GApplicationPar('emax','r','h','10.0','','',''))
        pars.append(gammalib.GApplicationPar('tmin','t','h','2005-10-08T14:30:25','','',''))
        pars.append(gammalib.GApplicationPar('tmax','t','h','2005-10-08T14:58:26','','',''))
        pars.append(gammalib.GApplicationPar('expcube','f','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('psfcube','f','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('bkgcube','f','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('edispcube','f','h','NONE','','',''))
        pars.append(gammalib.GApplicationPar('edisp','b','h','yes','','',''))
        pars.append(gammalib.GApplicationPar('caldb','s','h','prod2','','',''))
        pars.append(gammalib.GApplicationPar('irf','s','h','South_0.5h','','',''))
        pars.append_standard()
        pars.save('cscript_test.par')

        # Create parameter file for ctobservation_test.par application
        pars = gammalib.GApplicationPars()
        pars.append_standard()
        pars.save('ctobservation_test.par')

        # Create parameter file for ctlikelihood_test application
        pars = gammalib.GApplicationPars()
        pars.append_standard()
        pars.save('ctlikelihood_test.par')

        # Create energy boundaries file
        ebounds = gammalib.GEbounds(1, gammalib.GEnergy(1.0,'TeV'),
                                       gammalib.GEnergy(10.0,'TeV'))
        ebounds.save('test_ebinfile_ebounds.fits[EBOUNDS]', True)
        ebounds.save('test_ebinfile_energybins.fits[ENERGYBINS]', True)
        ebounds.save('test_ebinfile_bins.fits[BINS]', True)

        # Create energy bin file
        energies = gammalib.GEnergies(2, gammalib.GEnergy(1.0,'TeV'),
                                         gammalib.GEnergy(10.0,'TeV'))
        energies.save('test_ebinfile_energies.fits[ENERGIES]', True)
        energies.save('test_ebinfile_engs.fits[ENGS]', True)

        # Return
        return

    # Set test functions
    def set(self):
        """
        Set all test functions
        """
        # Set test name
        self.name('cscript')

        # Append tests
        self.append(self._test_cscript, 'Test cscript base class')
        self.append(self._test_ctobservation, 'Test ctobservation base class')
        self.append(self._test_ctlikelihood, 'Test ctlikelihood base class')

        # Return
        return

    # Test cscript base class
    def _test_cscript(self):
        """
        Test cscript base class
        """
        # Allocate empty
        empty = cscript_test()

        # Test read_ahead() method
        # TODO: implement

        # Test time_reference() method
        # TODO: implement

        # Test get_observations() method
        # TODO: implement

        # Test setup_observations() for invalid file name
        self.test_try('Check setup_observations() for "NONE"')
        try:
            empty.check_setup_observations('NONE')
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test setup_observations() for acceptable event list
        self.test_try('Check setup_observations() for acceptable event list')
        try:
            empty.check_setup_observations(self._events, events=True)
            self.test_try_success()
        except ValueError:
            self.test_try_failure('Exception thrown')

        # Test setup_observations() for unacceptable event list
        self.test_try('Check setup_observations() for unacceptable event list')
        try:
            empty.check_setup_observations(self._events, events=False)
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test setup_observations() for acceptable counts cube
        self.test_try('Check setup_observations() for acceptable counts cube')
        try:
            empty.check_setup_observations(self._cntcube, cube=True)
            self.test_try_success()
        except ValueError:
            self.test_try_failure('Exception thrown')

        # Test setup_observations() for unacceptable counts cube
        self.test_try('Check setup_observations() for unacceptable counts cube')
        try:
            empty.check_setup_observations(self._cntcube, cube=False)
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test setup_models() for invalid model definition file name
        self.test_try('Check setup_models() for invalid model definition file name')
        try:
            empty.check_setup_models()
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test create_ebounds() method for "EBOUNDS" extension
        ebounds = empty.check_create_ebounds('test_ebinfile_ebounds.fits')
        self.test_value(ebounds.size(), 1, 'Check number of energy boundaries')
        self.test_value(ebounds.emin().TeV(), 1.0, 'Check minimum energy')
        self.test_value(ebounds.emax().TeV(), 10.0, 'Check maximum energy')

        # Test create_ebounds() method for "ENERGYBINS" extension
        ebounds = empty.check_create_ebounds('test_ebinfile_energybins.fits')
        self.test_value(ebounds.size(), 1, 'Check number of energy boundaries')
        self.test_value(ebounds.emin().TeV(), 1.0, 'Check minimum energy')
        self.test_value(ebounds.emax().TeV(), 10.0, 'Check maximum energy')

        # Test create_ebounds() method for "ENERGIES" extension
        ebounds = empty.check_create_ebounds('test_ebinfile_energies.fits')
        self.test_value(ebounds.size(), 1, 'Check number of energy boundaries')
        self.test_value(ebounds.emin().TeV(), 1.0, 'Check minimum energy')
        self.test_value(ebounds.emax().TeV(), 10.0, 'Check maximum energy')

        # Test create_ebounds() method for invalid extension
        self.test_try('Check create_ebounds() method for invalid extension')
        try:
            empty.check_create_ebounds('test_ebinfile_energies.fits[INVALID]')
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test create_ebounds() method for "BINS" extension
        ebounds = empty.check_create_ebounds('test_ebinfile_bins.fits[BINS]')
        self.test_value(ebounds.size(), 1, 'Check number of energy boundaries')
        self.test_value(ebounds.emin().TeV(), 1.0, 'Check minimum energy')
        self.test_value(ebounds.emax().TeV(), 10.0, 'Check maximum energy')

        # Test create_ebounds() method for "ENGS" extension
        ebounds = empty.check_create_ebounds('test_ebinfile_engs.fits[ENGS]')
        self.test_value(ebounds.size(), 1, 'Check number of energy boundaries')
        self.test_value(ebounds.emin().TeV(), 1.0, 'Check minimum energy')
        self.test_value(ebounds.emax().TeV(), 10.0, 'Check maximum energy')

        # Test create_map() method
        # TODO: implement

        # Test create_cube() method
        # TODO: implement

        # Test create_cta_obs() method
        # TODO: implement

        # Test require_inobs() method for invalid file name
        self.test_try('Check require_inobs() method for invalid file name')
        try:
            empty.check_require_inobs('NONE')
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test require_inobs_nocube() method for valid file name
        self.test_try('Check require_inobs_nocube() method for event list')
        try:
            empty.check_require_inobs_nocube(self._events)
            self.test_try_success()
        except ValueError:
            self.test_try_failure('Exception thrown')

        # Test require_inobs_nocube() method for invalid file name
        self.test_try('Check require_inobs_nocube() method for counts cube')
        try:
            empty.check_require_inobs_nocube(self._cntcube)
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test get_roi() method
        roi = empty.check_get_roi()
        self.test_assert(not roi.is_valid(), 'Check get_roi() method')

        # Test get_ebounds() method
        # TODO: implement

        # Test get_gti() method
        # TODO: implement

        # Test get_pointing() method
        # TODO: implement

        # Test get_skydir() method
        # TODO: implement

        # Test set_outfile_name() method
        # TODO: implement

        # Test is_stacked() method
        # TODO: implement

        # Test set_response() method
        # TODO: implement

        # Test set_edisp() method
        # TODO: implement

        # Test restore_edisp() method for invalid vector size
        self.test_try('Check restore_edisp() method for invalid vector size')
        try:
            empty.check_restore_edisp()
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test set_obs_response() method with 'NONE' files. If energy dispersion
        # is requested then an exception will be thrown.
        empty.check_set_obs_response('NONE', 'NONE', 'NONE', 'NONE', 'no')
        empty.check_set_obs_response('NONE', 'NONE', 'NONE', 'NONE', 'yes')
        self.test_try('Check set_obs_response() method for file names')
        try:
            empty.check_set_obs_response(self._datadir+'/crab_expcube.fits',
                                         self._datadir+'/crab_psfcube.fits',
                                         self._datadir+'/crab_bkgcube.fits',
                                         'NONE', 'yes')
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()
        empty.check_set_obs_response(self._datadir+'/crab_expcube.fits',
                                     self._datadir+'/crab_psfcube.fits',
                                     self._datadir+'/crab_bkgcube.fits',
                                     self._datadir+'/crab_edispcube.fits',
                                     'yes')

        # Test set_obs_bounds() method
        obs = empty.check_set_obs_bounds()
        self.test_value(obs.size(), 1, 'Check number of observations')
        self.test_value(obs[0].events().ebounds().size(), 1,
                        'Check number of energy boundaries')
        self.test_value(obs[0].events().ebounds().emin().TeV(), 1.0,
                        'Check minimum energy')
        self.test_value(obs[0].events().ebounds().emax().TeV(), 10.0,
                        'Check maximum energy')
        self.test_value(obs[0].events().roi().radius(), 1.0,
                        'Check RoI radius')

        # Test get_mean_pointing() method for empty observation container
        self.test_try('Check get_mean_pointing() method for empty observation '
                      'container')
        try:
            empty.check_get_mean_pointing()
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test get_current_rss() method
        empty.check_get_current_rss()

        # Test get_obs_header() method
        # TODO: implement

        # Test insert_energy_boundaries() method
        # TODO: implement

        # Test cube_layer_usage() method
        # TODO: implement

        # Test is_valid_filename() method
        self.test_assert(empty.check_is_valid_filename(self._model),
                         'Check model definiton XML file')
        self.test_assert(not empty.check_is_valid_filename(''),
                         'Check empty filename')
        self.test_assert(not empty.check_is_valid_filename('NONE'),
                         'Check "NONE" filename')

        # Test get_gtiname() method
        # TODO: implement

        # Check save_event_list() method
        empty.check_save_event_list('test_event_list_input1.fits', 'EVENTS',
                                    'GTI', 'test_event_list_output1.fits')
        self._test_cscript_save_event_list('test_event_list_output1.fits',
                                           ['Primary','EVENTS','GTI'])
        empty.check_save_event_list('test_event_list_input2.fits', 'EVENTS',
                                    'GTI', 'test_event_list_output2.fits[EVT]')
        self._test_cscript_save_event_list('test_event_list_output2.fits',
                                           ['Primary','EVT','GTI'])
        empty.check_save_event_list('test_event_list_input3.fits', 'EVENTS',
                                    'GTI', 'test_event_list_output3.fits[EVT;TIME]')
        self._test_cscript_save_event_list('test_event_list_output3.fits',
                                           ['Primary','EVT','TIME'])
        empty.check_save_event_list('test_event_list_input4.fits', 'EVENTS',
                                    'GTI', 'test_event_list_output4.fits[EVT;]')
        self._test_cscript_save_event_list('test_event_list_output4.fits',
                                           ['Primary','EVT','GTI'])
        empty.check_save_event_list('test_event_list_input5.fits', 'EVENTS',
                                    'GTI', 'test_event_list_output5.fits[;TIME]')
        self._test_cscript_save_event_list('test_event_list_output5.fits',
                                           ['Primary','EVENTS','TIME'])
        empty.check_save_event_list('test_event_list_input6.fits', 'XEVENTS',
                                    'XGTI', 'test_event_list_output6.fits[EVT;TIME]')
        self._test_cscript_save_event_list('test_event_list_output6.fits',
                                           ['Primary','EVT','TIME','EVENTS','GTI'])

        # Test warn_too_few_energies() method
        # TODO: implement

        # Test warn_xml_suffix() method
        self.test_value(len(empty.check_warn_xml_suffix('test.xml')), 0,
                        'Check xml suffix warning for "test.xml" file')
        self.test_value(len(empty.check_warn_xml_suffix('test.fits')), 235,
                        'Check xml suffix warning for "test.fits" file')

        # Test provide_help() method
        # TODO: implement

        # Return
        return

    # Test check_save_event_list() method result
    def _test_cscript_save_event_list(self, filename, hdunames):
        """
        Test check_save_event_list() method result
        """
        # Open FITS file
        fits = gammalib.GFits(filename)

        # Check number of HDUs
        self.test_value(fits.size(), len(hdunames), 'save_event_list(): '
                        'Check number of FITS HDUs in file %s' % filename)

        # Check HDU extension names
        for i, hdu in enumerate(fits):
            self.test_value(hdu.extname(), hdunames[i], 'save_event_list(): '
                            'Check FITS HDU extension name in file %s' % filename)

        # Return
        return

    # Test ctobservation base class
    def _test_ctobservation(self):
        """
        Test ctobservation base class
        """
        # Allocate empty
        empty = ctobservation_test()

        # Test first_unbinned_observation() method
        self.test_assert(empty.check_first_unbinned_observation() is None,
                         'Check first_unbinned_observation() method')

        # Test next_unbinned_observation() method
        self.test_assert(empty.check_next_unbinned_observation() is None,
                         'Check next_unbinned_observation() method')

        # Test set_obs_statistic() method for unbinned observation
        self.test_value(empty.check_set_obs_statistic_unbinned('CSTAT'),
                        'CSTAT',
                        'Check set_obs_statistic("CSTAT") for unbinned')
        self.test_value(empty.check_set_obs_statistic_unbinned('WSTAT'),
                        'CSTAT',
                        'Check set_obs_statistic("WSTAT") for unbinned')
        self.test_value(empty.check_set_obs_statistic_unbinned('CHI2'),
                        'CSTAT',
                        'Check set_obs_statistic("CHI2") for unbinned')
        self.test_value(empty.check_set_obs_statistic_unbinned('DEFAULT'),
                        'CSTAT',
                        'Check set_obs_statistic("DEFAULT") for unbinned')

        # Test set_obs_statistic() method for binned observation
        self.test_value(empty.check_set_obs_statistic_binned('CSTAT'),
                        'CSTAT',
                        'Check set_obs_statistic("CSTAT") for binned')
        self.test_value(empty.check_set_obs_statistic_binned('WSTAT'),
                        'CSTAT',
                        'Check set_obs_statistic("WSTAT") for binned')
        self.test_value(empty.check_set_obs_statistic_binned('CHI2'),
                        'CHI2',
                        'Check set_obs_statistic("CHI2") for binned')
        self.test_value(empty.check_set_obs_statistic_binned('DEFAULT'),
                        'CSTAT',
                        'Check set_obs_statistic("DEFAULT") for binned')

        # Test set_obs_statistic() method for On/Off observation
        self.test_value(empty.check_set_obs_statistic_onoff('CSTAT'),
                        'CSTAT',
                        'Check set_obs_statistic("CSTAT") for On/Off')
        self.test_value(empty.check_set_obs_statistic_onoff('WSTAT'),
                        'WSTAT',
                        'Check set_obs_statistic("WSTAT") for On/Off')
        self.test_value(empty.check_set_obs_statistic_onoff('CHI2'),
                        'CSTAT',
                        'Check set_obs_statistic("CHI2") for On/Off')
        self.test_value(empty.check_set_obs_statistic_onoff('DEFAULT'),
                        'CSTAT',
                        'Check set_obs_statistic("DEFAULT") for On/Off')

        # Return
        return

    # Test ctlikelihood base class
    def _test_ctlikelihood(self):
        """
        Test ctlikelihood base class
        """
        # Allocate empty
        empty = ctlikelihood_test()

        # Test evaluate() method for minimum value violation
        self.test_try('Check evaluate() for minimum value violation')
        try:
            empty.check_evaluate(0.0)
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Test evaluate() method for maximum value violation
        self.test_try('Check evaluate() for maximum value violation')
        try:
            empty.check_evaluate(4.0)
            self.test_try_failure('Exception not thrown')
        except ValueError:
            self.test_try_success()

        # Return
        return