Add unittest for CullFromMaskedRegion selection

Author: laurenam

tests/test_sourceSelector.py

@@ -26,6 +26,7 @@
 import astropy.units as u
 import warnings
 
+import lsst.afw.image
 import lsst.afw.table
 import lsst.meas.algorithms
 import lsst.meas.base.tests
@@ -56,28 +57,35 @@ def setUp(self):
         schema.addField("nChild", np.int32, "Number of children")
         schema.addField("detect_isPrimary", "Flag", "Is primary detection?")
         schema.addField("sky_source", "Flag", "Empty sky region.")
+
+        self.xCol = "centroid_x"
+        self.yCol = "centroid_y"
+        schema.addField(self.xCol, float, "Centroid x value.")
+        schema.addField(self.yCol, float, "Centroid y value.")
+
         self.catalog = lsst.afw.table.SourceCatalog(schema)
         self.catalog.reserve(10)
         self.config = self.Task.ConfigClass()
+        self.exposure = None
 
     def tearDown(self):
         del self.catalog
 
     def check(self, expected):
         task = self.Task(config=self.config)
-        results = task.run(self.catalog)
+        results = task.run(self.catalog, exposure=self.exposure)
         self.assertListEqual(results.selected.tolist(), expected)
         self.assertListEqual([src.getId() for src in results.sourceCat],
                              [src.getId() for src, ok in zip(self.catalog, expected) if ok])
 
         # Check with pandas.DataFrame version of catalog
-        results = task.run(self.catalog.asAstropy().to_pandas())
+        results = task.run(self.catalog.asAstropy().to_pandas(), exposure=self.exposure)
         self.assertListEqual(results.selected.tolist(), expected)
         self.assertListEqual(list(results.sourceCat['id']),
                              [src.getId() for src, ok in zip(self.catalog, expected) if ok])
 
         # Check with astropy.table.Table version of catalog
-        results = task.run(self.catalog.asAstropy())
+        results = task.run(self.catalog.asAstropy(), exposure=self.exposure)
         self.assertListEqual(results.selected.tolist(), expected)
         self.assertListEqual(list(results.sourceCat['id']),
                              [src.getId() for src, ok in zip(self.catalog, expected) if ok])
@@ -369,6 +377,40 @@ def testFiniteRaDec(self):
 
         self.check([False, False, True, True, True])
 
+    def testCullFromMaskedRegion(self):
+        # Test that objects whose centroids land on specified mask(s) are
+        # culled.
+        maskNames = ["NO_DATA", "BLAH"]
+        noDataPoints = [[0, 0], [3, 2]]
+        self.exposure = lsst.afw.image.ExposureF(5, 5)
+        mask = self.exposure.mask
+        for maskName in maskNames:
+            if maskName not in mask.getMaskPlaneDict():
+                mask.addMaskPlane(maskName)
+        num = 5
+        for _ in range(num):
+            self.catalog.addNew()
+        self.catalog[self.xCol][:] = 5.0
+        self.catalog[self.yCol][:] = 5.0
+
+        # Set first two entries in catalog to land maskNames region.
+        for i, noDataPoint in enumerate(noDataPoints):
+            # Flip x & y for numpy array convention.
+            mask.array[noDataPoint[1]][noDataPoint[0]] = mask.getPlaneBitMask(
+                maskNames[min(i, len(maskNames) - 1)]
+            )
+            self.catalog[self.xCol][i] = noDataPoint[0]
+            self.catalog[self.yCol][i] = noDataPoint[1]
+
+        self.config.doCullFromMaskedRegion = True
+        self.config.cullFromMaskedRegion.xColName = self.xCol
+        self.config.cullFromMaskedRegion.yColName = self.yCol
+        self.config.cullFromMaskedRegion.badMaskNames = maskNames
+        self.check([False, False, True, True, True])
+        # Reset config back to False and None for other tests.
+        self.config.doCullFromMaskedRegion = False
+        self.exposure = None
+
 
 class TestBaseSourceSelector(lsst.utils.tests.TestCase):
     """Test the API of the Abstract Base Class with a trivial example."""