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# 

# LSST Data Management System 

# 

# Copyright 2008-2016 AURA/LSST. 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# 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 LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <https://www.lsstcorp.org/LegalNotices/>. 

# 

import unittest 

import numpy as np 

 

import lsst.afw.image as afwImage 

import lsst.afw.geom as afwGeom 

import lsst.geom as geom 

import lsst.meas.modelfit as measModel 

import lsst.utils 

 

 

class DefaultZeroPointTestCase(lsst.utils.tests.TestCase): 

'''Test that photoCalib objects containing invalid calibrations are replaced with a default having a 

zero-point of magnitude 27. 

''' 

 

def setUp(self): 

'''Create two calibs, one with a valid zero-point and one without. Use these to create two UnitSystem 

objects. 

''' 

self.mag2Flux = lambda m: 10.0**(m/2.5) 

self.flux2Mag = lambda f: 2.5*np.log10(f) 

 

photoCalibNoZero = afwImage.PhotoCalib() 

photoCalibWithZero = afwImage.makePhotoCalibFromCalibZeroPoint(self.mag2Flux(25)) 

 

scale = 0.2 * geom.arcseconds 

wcs = afwGeom.makeSkyWcs(crpix=geom.Point2D(), 

crval=geom.SpherePoint(45.0, 45.0, geom.degrees), 

cdMatrix=afwGeom.makeCdMatrix(scale=scale)) 

 

self.unitNoZero = measModel.UnitSystem(wcs, photoCalibNoZero) 

self.unitWithZero = measModel.UnitSystem(wcs, photoCalibWithZero) 

 

def testZeroPoint(self): 

'''Verify that the UnitSystem with an invalid photoCalib gets populated with a valid photoCalib, and that 

nothing happens to the UnitSystem with a valid photoCalib. 

''' 

magNoZero = self.flux2Mag(self.unitNoZero.photoCalib.getInstFluxAtZeroMagnitude()) 

magWithZero = self.flux2Mag(self.unitWithZero.photoCalib.getInstFluxAtZeroMagnitude()) 

 

print((magNoZero, magWithZero)) 

 

self.assertAlmostEqual(magNoZero, 27, 6) 

self.assertAlmostEqual(magWithZero, 25, 6) 

 

def tearDown(self): 

del self.unitNoZero 

del self.unitWithZero 

 

 

class TestMemory(lsst.utils.tests.MemoryTestCase): 

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

81 ↛ 82line 81 didn't jump to line 82, because the condition on line 81 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()