Method testExceptionHandling

test/IECore/MessageHandler.py:232–271

( self )

		self.assertEqual( w(), None )

	def testExceptionHandling( self ) :

		# This is more a test of ExceptionAlgo than it is MessageHandler, but
		# this is the most convenient place to put the test right now.

		class ThrowingMessageHandler( IECore.MessageHandler ):

			def __init__( self ) :

				IECore.MessageHandler.__init__( self )

			def handle( self, level, context, msg ):

				if context == "python" :
					raise Exception( "Test" )
				else :
					assert( context == "c++" )
					# This will raise a C++ exception that gets translated to a
					# Python exception, and then gets translated back to a C++
					# exception by the MessageHandlerWrapper, before finally
					# being converted back to another Python exception by the
					# binding for `IECore.msg()`.
					IECore.StringAlgo.substitute( "##", { "frame" : IECore.BoolData( False ) } )

		for exceptionType in [ "python", "c++" ] :

			with self.subTest( exceptionType = exceptionType ) :

				while gc.collect() :
					pass

				expected = "Test" if exceptionType == "python" else "Unexpected data type"
				with self.assertRaisesRegex( Exception, expected ) :
					with ThrowingMessageHandler() :
						IECore.msg( IECore.Msg.Level.Error, exceptionType, "message" )

				# There should be no Exception objects in the garbage pool. If
				# there were, that would indicate a reference counting error in
				# `ExceptionAlgo::translatePythonException()`.
				self.assertEqual( [ o for o in gc.get_objects() if isinstance( o, Exception ) ], [] )

	def testOStreamLineSplitting( self ) :