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# 

# LSST Data Management System 

# Copyright 2008-2017 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 <http://www.lsstcorp.org/LegalNotices/>. 

# 

 

import unittest 

import math 

 

import lsst.geom 

import lsst.afw.image 

import lsst.afw.table 

from lsst.meas.base.tests import (AlgorithmTestCase, FluxTransformTestCase, 

SingleFramePluginTransformSetupHelper) 

import lsst.utils.tests 

 

 

class ScaledApertureFluxTestCase(AlgorithmTestCase, lsst.utils.tests.TestCase): 

 

def setUp(self): 

self.center = lsst.geom.Point2D(50.1, 49.8) 

self.bbox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), 

lsst.geom.Extent2I(100, 100)) 

self.dataset = lsst.meas.base.tests.TestDataset(self.bbox) 

self.sourceFlux = 100000.0 

self.dataset.addSource(self.sourceFlux, self.center) 

 

def tearDown(self): 

del self.center 

del self.bbox 

del self.dataset 

 

def makeAlgorithm(self, ctrl=None): 

""" 

Construct a ScaledApertureFluxAlgorithm with an accompanying schema and return them both. 

""" 

53 ↛ 54line 53 didn't jump to line 54, because the condition on line 53 was never true if ctrl is None: 

ctrl = lsst.meas.base.ScaledApertureFluxControl() 

schema = lsst.meas.base.tests.TestDataset.makeMinimalSchema() 

algorithm = lsst.meas.base.ScaledApertureFluxAlgorithm(ctrl, "base_ScaledApertureFlux", schema) 

return algorithm, schema 

 

def testSourceFlux(self): 

"""Check that we recover the source flux.""" 

ctrl = lsst.meas.base.ScaledApertureFluxControl() 

algorithm, schema = self.makeAlgorithm(ctrl) 

exposure, catalog = self.dataset.realize(10.0, schema, randomSeed=0) 

 

# Default aperture should collect ~all source flux. 

algorithm.measure(catalog[0], exposure) 

self.assertAlmostEqual(catalog[0].get("base_ScaledApertureFlux_flux") / self.sourceFlux, 1.0, 2) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag")) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag_apertureTruncated")) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag_sincCoeffsTruncated")) 

 

# Aperture equal to the PSF FWHM should collect ~93.7% of the flux. 

ctrl.scale = 1.0 

algorithm, schema = self.makeAlgorithm(ctrl) 

algorithm.measure(catalog[0], exposure) 

self.assertAlmostEqual(catalog[0].get("base_ScaledApertureFlux_flux") / self.sourceFlux, 0.9375, 2) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag")) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag_apertureTruncated")) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag_sincCoeffsTruncated")) 

 

def testApertureTruncated(self): 

"""Check that we set a flag appropriately when the aperture overflows the image.""" 

""" 

Note that this is a fatal failure: we do not return a useful result, but rather set the global flag. 

""" 

ctrl = lsst.meas.base.ScaledApertureFluxControl() 

ctrl.scale = 100 

algorithm, schema = self.makeAlgorithm(ctrl) 

exposure, catalog = self.dataset.realize(10.0, schema, randomSeed=1) 

 

algorithm.measure(catalog[0], exposure) 

self.assertTrue(math.isnan(catalog[0].get("base_ScaledApertureFlux_flux"))) 

self.assertTrue(catalog[0].get("base_ScaledApertureFlux_flag")) 

self.assertTrue(catalog[0].get("base_ScaledApertureFlux_flag_apertureTruncated")) 

self.assertTrue(catalog[0].get("base_ScaledApertureFlux_flag_sincCoeffsTruncated")) 

 

def testSincCoeffsTruncated(self): 

"""Check that we set a flag appropriately when the coefficient image is clipped.""" 

""" 

Note that we don't regard this as a fatal failure, so the global flag 

is not set and we still provide a numeric result. 

""" 

ctrl = lsst.meas.base.ScaledApertureFluxControl() 

ctrl.scale = 10 

algorithm, schema = self.makeAlgorithm(ctrl) 

exposure, catalog = self.dataset.realize(10.0, schema, randomSeed=2) 

 

algorithm.measure(catalog[0], exposure) 

self.assertFalse(math.isnan(catalog[0].get("base_ScaledApertureFlux_flux"))) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag")) 

self.assertFalse(catalog[0].get("base_ScaledApertureFlux_flag_apertureTruncated")) 

self.assertTrue(catalog[0].get("base_ScaledApertureFlux_flag_sincCoeffsTruncated")) 

 

 

class ScaledApertureFluxTransformTestCase(FluxTransformTestCase, 

SingleFramePluginTransformSetupHelper, 

lsst.utils.tests.TestCase): 

controlClass = lsst.meas.base.ScaledApertureFluxControl 

algorithmClass = lsst.meas.base.ScaledApertureFluxAlgorithm 

transformClass = lsst.meas.base.ScaledApertureFluxTransform 

flagNames = ('flag', 'flag_apertureTruncated', 'flag_sincCoeffsTruncated') 

singleFramePlugins = ('base_ScaledApertureFlux',) 

forcedPlugins = ('base_ScaledApertureFlux',) 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

134 ↛ 135line 134 didn't jump to line 135, because the condition on line 134 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()