Add min/max wavelength FilterProperty unit test.

tests/test_color.py

@@ -297,6 +297,20 @@ def testFilterProperty(self):
                          self.defineFilterProperty("gX", self.g_lambdaEff, force=True))
         self.assertEqual(g.getLambdaEff(), self.g_lambdaEff)
 
+    def testLambdaMinMax(self):
+        """Test additional properties for minimum and maximum wavelength for a filter."""
+        filt = afwImage.Filter("g")
+        # LambdaMin and LambdaMax are undefined for the test SDSS filter, and should return nan
+        self.assertTrue(np.isnan(filt.getFilterProperty().getLambdaMin()))
+        self.assertTrue(np.isnan(filt.getFilterProperty().getLambdaMax()))
+        lambdaEff = 476.31
+        lambdaMin = 405
+        lambdaMax = 552
+        imageUtils.defineFilter("gNew", lambdaEff, lambdaMin=lambdaMin, lambdaMax=lambdaMax)
+        filtNew = afwImage.Filter("gNew")
+        self.assertEqual(lambdaMin, filtNew.getFilterProperty().getLambdaMin())
+        self.assertEqual(lambdaMax, filtNew.getFilterProperty().getLambdaMax())
+
     def testFilterAliases(self):
         """Test that we can provide an alias for a Filter"""
         for name0 in self.aliases: