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

# 

 

import unittest 

import numpy as np 

 

import lsst.utils.tests 

from lsst.ip.isr.measureCrosstalk import (MeasureCrosstalkTask, MeasureCrosstalkConfig) 

import lsst.ip.isr.isrMock as isrMock 

 

 

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

 

def setup_measureCrosstalk(self, isTrimmed=False, nSources=8): 

"""Generate a simulated set of exposures and test the measured 

crosstalk matrix. 

 

Parameters 

---------- 

isTrimmed : `bool`, optional 

Should the simulation use trimmed or untrimmed raw 

exposures? 

nSources : `int`, optional 

Number of random simulated sources to generate in the 

simulated exposures. 

 

Returns 

------- 

coeffErr : `np.ndarray` 

Array of booleans indicating if the measured and expected 

crosstalk ratios are smaller than the measured uncertainty 

in the crosstalk ratio. 

""" 

mockTask = isrMock.CalibratedRawMock() 

mockTask.config.rngSeed = 12345 

mockTask.config.doGenerateImage = True 

mockTask.config.doAddSky = True 

mockTask.config.doAddSource = True 

mockTask.config.doAddCrosstalk = True 

mockTask.config.doAddBias = True 

mockTask.config.doAddFringe = False 

 

mockTask.config.skyLevel = 0.0 

mockTask.config.biasLevel = 0.0 

mockTask.config.readNoise = 100.0 

 

mcConfig = MeasureCrosstalkConfig() 

mcConfig.threshold = 4000 

mcConfig.isTrimmed = isTrimmed 

mct = MeasureCrosstalkTask(config=mcConfig) 

fullResult = [] 

 

mockTask.config.isTrimmed = isTrimmed 

# Generate simulated set of exposures. 

for idx in range(0, 10): 

mockTask.config.rngSeed = 12345 + idx * 1000 

 

# Allow each simulated exposure to have nSources random 

# bright sources. 

mockTask.config.sourceAmp = (np.random.randint(8, size=nSources)).tolist() 

mockTask.config.sourceFlux = ((np.random.random(size=nSources) * 25000.0 + 20000.0).tolist()) 

mockTask.config.sourceX = ((np.random.random(size=nSources) * 100.0).tolist()) 

mockTask.config.sourceY = ((np.random.random(size=nSources) * 50.0).tolist()) 

 

exposure = mockTask.run() 

result = mct.run(exposure, dataId=None) 

fullResult.append(result) 

 

# Generate the final measured CT ratios, uncertainties, pixel counts. 

coeff, coeffSig, coeffNum = mct.reduce(fullResult) 

 

# Needed because measureCrosstalk cannot find coefficients equal to 0.0 

coeff = np.nan_to_num(coeff) 

coeffSig = np.nan_to_num(coeffSig) 

 

# Compare result against expectation used to create the simulation. 

expectation = isrMock.CrosstalkCoeffMock().run() 

coeffErr = abs(coeff - expectation) <= coeffSig 

return coeffErr 

 

def testMeasureCrosstalkTaskTrimmed(self): 

"""Measure crosstalk from a sequence of trimmed mocked images. 

""" 

coeffErr = self.setup_measureCrosstalk(isTrimmed=True, nSources=8) 

 

self.assertTrue(np.all(coeffErr)) 

 

def testMeasureCrosstalkTaskUntrimmed(self): 

"""Measure crosstalk from a sequence of untrimmed mocked images. 

""" 

coeffErr = self.setup_measureCrosstalk(isTrimmed=False, nSources=8) 

 

# DM-18528 This doesn't always fully converge, so be permissive 

# for now. 

self.assertTrue(np.any(coeffErr)) 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

125 ↛ 126line 125 didn't jump to line 126, because the condition on line 125 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()