Add unittest for disabling summary stats updates

Author: laurenam

tests/test_computeExposureSummaryStats.py

@@ -101,12 +101,51 @@ def testComputeExposureSummary(self):
         background.append(backobj)
 
         # Configure and run the task
+        expSummaryTaskNoUpdates = ComputeExposureSummaryStatsTask()
         expSummaryTask = ComputeExposureSummaryStatsTask()
         # Configure nominal values for effective time calculation
         expSummaryTask.config.fiducialZeroPoint = {band: float(zp)}
         expSummaryTask.config.fiducialPsfSigma = {band: float(psfSize)}
         expSummaryTask.config.fiducialSkyBackground = {band: float(skyMean)}
-        # Run the task
+
+        # Run the task with optianal updates turned off
+        expSummaryTaskNoUpdates.config.doUpdatePsfModelStats = False
+        expSummaryTaskNoUpdates.config.doUpdateApCorrModelStats = False
+        expSummaryTaskNoUpdates.config.doUpdateMaxDistToNearestPsfStats = False
+        expSummaryTaskNoUpdates.config.doUpdateWcsStats = False
+        expSummaryTaskNoUpdates.config.doUpdatePhotoCalibStats = False
+        expSummaryTaskNoUpdates.config.doUpdateBackgroundStats = False
+        expSummaryTaskNoUpdates.config.doUpdateMaskedImageStats = False
+        expSummaryTaskNoUpdates.config.doUpdateEffectiveTimeStats = False
+
+        summary = expSummaryTaskNoUpdates.run(exposure, None, background)
+        # Test the outputs
+        nan = float("nan")
+        self.assertTrue(summary.ra, nan)
+        self.assertTrue(summary.dec, nan)
+
+        # The following PSF metrics are always updated
+        self.assertFloatsAlmostEqual(summary.psfSigma, psfSize)
+        self.assertFloatsAlmostEqual(summary.psfIxx, psfSize**2.)
+        self.assertFloatsAlmostEqual(summary.psfIyy, psfSize**2.)
+        self.assertFloatsAlmostEqual(summary.psfIxy, 0.0)
+        self.assertFloatsAlmostEqual(summary.psfArea, 23.088975164455444)
+
+        # The following should not have been updated (i.e. set to nan)
+        self.assertTrue(summary.psfTraceRadiusDelta, nan)
+        self.assertTrue(summary.psfApFluxDelta, nan)
+        self.assertTrue(summary.psfApCorrSigmaScaledDelta, nan)
+        self.assertTrue(summary.maxDistToNearestPsf, nan)
+        self.assertTrue(summary.pixelScale, nan)
+
+        self.assertTrue(summary.zenithDistance, nan)
+        self.assertTrue(summary.skyBg, nan)
+        self.assertTrue(summary.skyNoise, nan)
+        self.assertTrue(summary.meanVar, nan)
+        self.assertTrue(summary.zeroPoint, nan)
+        self.assertTrue(summary.expTime, nan)
+
+        # Run the task with updates
         summary = expSummaryTask.run(exposure, None, background)
 
         # Test the outputs