Checks if configuration is ok.

def check_configuration(self, file_path, test_program, custom_args):
        """Checks if configuration is ok."""
        # checking filepath
        if not os.path.isdir(file_path):
            raise InvalidFilePath("INVALID CONFIGURATION: file path %s is not a directory" %
                os.path.abspath(file_path)
            )

        if not test_program in IMPLEMENTED_TEST_PROGRAMS:
            raise InvalidTestProgram('The `%s` is unknown, or not yet implemented. Please chose another one.' % test_program)

        if custom_args:
            if not self.quiet and not ask("WARNING!!!\nYou are about to run the following command\n\n   $ %s\n\nAre you sure you still want to proceed [y/N]? " % self.get_cmd()):
                raise CancelDueToUserRequest('Test cancelled...')