createExceptionMappingFile(file, INITIAL_VALUE);
MuleContext ctx = new DefaultMuleContextFactory().createMuleContext();
String value = ExceptionHelper.getErrorMapping(TEST_PROTOCOL, IllegalArgumentException.class, ctx);
assertThat(value,is(INITIAL_VALUE));
ctx.dispose();
createExceptionMappingFile(file, VALUE_AFTER_REDEPLOY);
ctx = new DefaultMuleContextFactory().createMuleContext();
ctx.setExecutionClassLoader(getClass().getClassLoader());