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# See COPYRIGHT file at the top of the source tree. 

import unittest 

import unittest.mock 

 

import numpy as np 

 

import lsst.log 

import lsst.utils 

 

import lsst.jointcal 

from lsst.jointcal import MinimizeResult 

import lsst.jointcal.chi2 

import lsst.jointcal.testUtils 

 

 

# for MemoryTestCase 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

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

def setUp(self): 

struct = lsst.jointcal.testUtils.createTwoFakeCcdImages(100, 100) 

self.ccdImageList = struct.ccdImageList 

# so that countStars() returns nonzero results 

for ccdImage in self.ccdImageList: 

ccdImage.resetCatalogForFit() 

 

self.config = lsst.jointcal.jointcal.JointcalConfig() 

# disable both, so it doesn't configure any refObjLoaders 

self.config.doAstrometry = False 

self.config.doPhotometry = False 

self.jointcal = lsst.jointcal.JointcalTask(config=self.config) 

 

self.goodChi2 = lsst.jointcal.chi2.Chi2Statistic() 

# chi2/ndof == 2.0 should be non-bad 

self.goodChi2.chi2 = 200.0 

self.goodChi2.ndof = 100 

 

self.badChi2 = lsst.jointcal.chi2.Chi2Statistic() 

self.badChi2.chi2 = 600.0 

self.badChi2.ndof = 100 

 

self.nanChi2 = lsst.jointcal.chi2.Chi2Statistic() 

self.nanChi2.chi2 = np.nan 

self.nanChi2.ndof = 100 

 

self.maxSteps = 20 

self.name = "testing" 

self.whatToFit = "" # unneeded, since we're mocking the fitter 

 

# Mock the fitter, association manager, and model, so we can force particular 

# return values/exceptions. Default to "good" return values. 

self.fitter = unittest.mock.Mock(spec=lsst.jointcal.PhotometryFit) 

self.fitter.computeChi2.return_value = self.goodChi2 

self.fitter.minimize.return_value = MinimizeResult.Converged 

self.associations = unittest.mock.Mock(spec=lsst.jointcal.Associations) 

self.associations.getCcdImageList.return_value = self.ccdImageList 

self.model = unittest.mock.Mock(spec=lsst.jointcal.SimpleFluxModel) 

 

def test_iterateFit_success(self): 

chi2 = self.jointcal._iterate_fit(self.associations, self.fitter, 

self.maxSteps, self.name, self.whatToFit) 

self.assertEqual(chi2, self.goodChi2) 

# Once for the for loop, the second time for the rank update. 

self.assertEqual(self.fitter.minimize.call_count, 2) 

 

def test_iterateFit_failed(self): 

self.fitter.minimize.return_value = MinimizeResult.Failed 

 

with self.assertRaises(RuntimeError): 

self.jointcal._iterate_fit(self.associations, self.fitter, 

self.maxSteps, self.name, self.whatToFit) 

self.assertEqual(self.fitter.minimize.call_count, 1) 

 

def test_iterateFit_badFinalChi2(self): 

log = unittest.mock.Mock(spec=lsst.log.Log) 

self.jointcal.log = log 

self.fitter.computeChi2.return_value = self.badChi2 

 

chi2 = self.jointcal._iterate_fit(self.associations, self.fitter, 

self.maxSteps, self.name, self.whatToFit) 

self.assertEqual(chi2, self.badChi2) 

log.info.assert_called_with("%s %s", "Fit completed", self.badChi2) 

log.error.assert_called_with("Potentially bad fit: High chi-squared/ndof.") 

 

def test_iterateFit_exceedMaxSteps(self): 

log = unittest.mock.Mock(spec=lsst.log.Log) 

self.jointcal.log = log 

self.fitter.minimize.return_value = MinimizeResult.Chi2Increased 

maxSteps = 3 

 

chi2 = self.jointcal._iterate_fit(self.associations, self.fitter, 

maxSteps, self.name, self.whatToFit) 

self.assertEqual(chi2, self.goodChi2) 

self.assertEqual(self.fitter.minimize.call_count, maxSteps) 

log.error.assert_called_with("testing failed to converge after %s steps" % maxSteps) 

 

def test_invalid_model(self): 

self.model.validate.return_value = False 

with(self.assertRaises(ValueError)): 

self.jointcal._logChi2AndValidate(self.associations, self.fitter, self.model) 

 

def test_nonfinite_chi2(self): 

self.fitter.computeChi2.return_value = self.nanChi2 

with(self.assertRaises(FloatingPointError)): 

self.jointcal._logChi2AndValidate(self.associations, self.fitter, self.model) 

 

 

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

pass 

 

 

114 ↛ 115line 114 didn't jump to line 115, because the condition on line 114 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()