CA-128095: [UnitTest] Unhandled exception in LVMoISCSISR.load()

Signed-off-by: Kostas Ladopoulos <konstantinos.ladopoulos@citrix.com>

tests/test_LVHDoISCSISR.py

@@ -0,0 +1,77 @@
+import unittest
+import mock
+import LVHDoISCSISR
+
+
+class RandomException(Exception):
+    pass
+
+
+class NonInitingLVHDoISCSISR(LVHDoISCSISR.LVHDoISCSISR):
+
+    """ Helper class; Creates dummy LVHDoISCSISR object.
+        Add attributes/methods as appropriate.
+    """
+
+    def __init__(self, extra_dconf=None, extra_params=None):
+
+        from SRCommand import SRCommand
+        from DummySR import DRIVER_INFO
+
+        self.mpath = "false"
+        self.dconf = {
+            'target': 'target',
+            'localIQN': 'localIQN',
+            'targetIQN': 'targetIQN',
+            'SCSIid': 'SCSIid'
+        }
+
+        self.srcmd = mock.Mock(spec=SRCommand(DRIVER_INFO))
+        self.srcmd.dconf = self.dconf
+
+        self.original_srcmd = self.srcmd
+
+        self.srcmd.params = {'command': 'command'}
+
+        self.srcmd.dconf.update(extra_dconf or {})
+        self.srcmd.params.update(extra_params or {})
+
+
+class TestLVHDoISCSISR(unittest.TestCase):
+
+    @mock.patch('iscsilib.ensure_daemon_running_ok')
+    @mock.patch('util._convertDNS')
+    @mock.patch('SR.driver')
+    @mock.patch('util.gen_uuid')
+    def test_load_reraise_unhandled_exceptions(
+            self,
+            mock_util_gen_uuid,
+            mock_SR_driver,
+            mock_util__convertDNS,
+            mock_iscsilib_ensure_daemon_running_ok):
+
+        """ Asserts that all unhandled exceptions are reraised.
+
+            In LVHDoISCSISR.load() there is a big try/except block that
+            doesn't handle all exceptions. Specifically, it logs the
+            exception and tries to continue after the block, almost certainly
+            resulting in an "IndexError" exception because the "self.iscsiSRs"
+            list is empty. This test asserts that all such exceptions are
+            reraised.
+        """
+
+        mock_util_gen_uuid.return_value = 'deadbeef'
+        mock_util__convertDNS.return_value = '127.0.0.1'
+        mock_iscsilib_ensure_daemon_running_ok.side_effect = \
+            RandomException('test_load_reraise_unhandled_exceptions')
+
+        lvhd_o_iscsi_sr = NonInitingLVHDoISCSISR(
+            {'targetIQN': '*'},
+            {'command': 'sr_create'}
+        )
+
+        try:
+            lvhd_o_iscsi_sr.load(None)
+        except Exception, e:
+            self.assertTrue(isinstance(e, RandomException))
+            self.assertEqual(str(e), 'test_load_reraise_unhandled_exceptions')