Trigger unittest.SkipTest() if DBauth doesn't connect.

Previously these DB connection tests were being skipped by scons.
The shift here to being a setUpClass method allows for the exception
to be raised and the test formally "Skipped" instead falsely "Passed"
as it was before.

tests/testSelectFluxMag0.py

@@ -48,6 +48,21 @@ def __init__(self, dataId):
 class ScaleLsstSimZeroPointTaskTestCase(unittest.TestCase):
     """A test case for ScaleLsstSimZeroPointTask
     """
+    @classmethod
+    def setUpClass(self):
+        """Initialize the DB connection.  Raise SkipTest if unable to access DB."""
+        config = SpatialScaleZeroPointTask.ConfigClass()
+        config.selectFluxMag0.retarget(SelectLsstSimFluxMag0Task)
+        print config
+        try:
+            DbAuth.username(config.selectFluxMag0.host, str(config.selectFluxMag0.port)),
+        except (Exception, RuntimeError) as e:
+            reason = "Warning: did not find host=%s, port=%s in your db-auth file; or %s " \
+                     "skipping unit tests" % \
+                     (config.selectFluxMag0.host, str(config.selectFluxMag0.port), e)
+            raise unittest.SkipTest(reason)
+
+
     def makeTestExposure(self, xNumPix, yNumPix):
         """
         Create and return an exposure that is completely covered by the database: test_select_lsst_images
@@ -152,22 +167,6 @@ class MemoryTester(lsst.utils.tests.MemoryTestCase):
     pass
 
 
-    return unittest.TestSuite(suites)
-
-
-def run(shouldExit=False):
-    """Run the tests"""
-
-    config = SpatialScaleZeroPointTask.ConfigClass()
-    config.selectFluxMag0.retarget(SelectLsstSimFluxMag0Task)
-    print config
-    try:
-        DbAuth.username(config.selectFluxMag0.host, str(config.selectFluxMag0.port)),
-    except Exception, e:
-        print "Warning: did not find host=%s, port=%s in your db-auth file; or %s " \
-              "skipping unit tests" % \
-            (config.selectFluxMag0.host, str(config.selectFluxMag0.port), e)
-        return
 def setup_module(module):
     lsst.utils.tests.init()
 

tests/testSelectLsstImages.py

@@ -46,6 +46,17 @@ def getCoordList(minRa, minDec, maxRa, maxDec):
 
 class LsstMapperTestCase(unittest.TestCase):
     """A test case for SelectLsstImagesTask."""
+    @classmethod
+    def setUpClass(self):
+        """Initialize the DB connection.  Raise SkipTest if unable to access DB."""
+        config = SelectLsstImagesTask.ConfigClass()
+        try:
+            DbAuth.username(config.host, str(config.port)),
+        except (Exception, RuntimeError) as e:
+            reason = "Warning: did not find host=%s, port=%s in your db-auth file; skipping SelectLsstImagesTask unit tests" % \
+                     (config.host, str(config.port))
+            raise unittest.SkipTest(reason)
+
     def testMaxFwhm(self):
         """Test config.maxFwhm
         """
@@ -89,15 +100,6 @@ class MemoryTester(lsst.utils.tests.MemoryTestCase):
     pass
 
 
-def run(shouldExit=False):
-    config = SelectLsstImagesTask.ConfigClass()
-    try:
-        DbAuth.username(config.host, str(config.port)),
-    except Exception:
-        print "Warning: did not find host=%s, port=%s in your db-auth file; skipping SelectLsstImagesTask unit tests" % \
-            (config.host, str(config.port))
-        return
-
 def setup_module(module):
     lsst.utils.tests.init()