How to use ReturnValueResolver method in Robotframework

Best Python code snippet using robotframework

assigner.py

Source:assigner.py

...82        return HandlerExecutionFailed(ErrorDetails(exc_info))83    def assign(self, return_value):84        context = self._context85        context.trace(lambda: 'Return: %s' % prepr(return_value))86        resolver = ReturnValueResolver(self._assignment)87        for name, value in resolver.resolve(return_value):88            if not self._extended_assign(name, value, context.variables):89                value = self._normal_assign(name, value, context.variables)90            context.info(format_assign_message(name, value))91    def _extended_assign(self, name, value, variables):92        if name[0] != '$' or '.' not in name or name in variables:93            return False94        base, attr = self._split_extended_assign(name)95        try:96            var = variables[base]97        except DataError:98            return False99        if not (self._variable_supports_extended_assign(var) and100                self._is_valid_extended_attribute(attr)):101            return False102        try:103            setattr(var, attr, value)104        except:105            raise VariableError("Setting attribute '%s' to variable '%s' "106                                "failed: %s" % (attr, base, get_error_message()))107        return True108    def _split_extended_assign(self, name):109        base, attr = name.rsplit('.', 1)110        return base.strip() + '}', attr[:-1].strip()111    def _variable_supports_extended_assign(self, var):112        return not (is_string(var) or is_number(var))113    def _is_valid_extended_attribute(self, attr):114        return self._valid_extended_attr.match(attr) is not None115    def _normal_assign(self, name, value, variables):116        variables[name] = value117        # Always return the actually assigned value.118        return value if name[0] == '$' else variables[name]119def ReturnValueResolver(assignment):120    if not assignment:121        return NoReturnValueResolver()122    if len(assignment) == 1:123        return OneReturnValueResolver(assignment[0])124    if any(a[0] == '@' for a in assignment):125        return ScalarsAndListReturnValueResolver(assignment)126    return ScalarsOnlyReturnValueResolver(assignment)127class NoReturnValueResolver(object):128    def resolve(self, return_value):129        return []130class OneReturnValueResolver(object):131    def __init__(self, variable):132        self._variable = variable133    def resolve(self, return_value):134        if return_value is None:135            identifier = self._variable[0]136            return_value = {'$': None, '@': [], '&': {}}[identifier]137        return [(self._variable, return_value)]138class _MultiReturnValueResolver(object):139    def __init__(self, variables):140        self._variables = variables141        self._min_count = len(variables)142    def resolve(self, return_value):143        return_value = self._convert_to_list(return_value)144        self._validate(len(return_value))145        return self._resolve(return_value)146    def _convert_to_list(self, return_value):147        if return_value is None:148            return [None] * self._min_count149        if is_string(return_value):150            self._raise_expected_list(return_value)151        try:152            return list(return_value)153        except TypeError:154            self._raise_expected_list(return_value)155    def _raise_expected_list(self, ret):156        self._raise('Expected list-like value, got %s.' % type_name(ret))157    def _raise(self, error):158        raise VariableError('Cannot set variables: %s' % error)159    def _validate(self, return_count):160        raise NotImplementedError161    def _resolve(self, return_value):162        raise NotImplementedError163class ScalarsOnlyReturnValueResolver(_MultiReturnValueResolver):164    def _validate(self, return_count):165        if return_count != self._min_count:166            self._raise('Expected %d return values, got %d.'167                        % (self._min_count, return_count))168    def _resolve(self, return_value):169        return list(zip(self._variables, return_value))170class ScalarsAndListReturnValueResolver(_MultiReturnValueResolver):171    def __init__(self, variables):172        _MultiReturnValueResolver.__init__(self, variables)173        self._min_count -= 1174    def _validate(self, return_count):175        if return_count < self._min_count:176            self._raise('Expected %d or more return values, got %d.'177                        % (self._min_count, return_count))178    def _resolve(self, return_value):179        before_vars, list_var, after_vars \180            = self._split_variables(self._variables)181        before_items, list_items, after_items \182            = self._split_return(return_value, before_vars, after_vars)183        before = list(zip(before_vars, before_items))184        after = list(zip(after_vars, after_items))...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.