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robot.running.arguments.embedded

EmbeddedArguments 

EmbeddedArguments(
    name: Pattern,
    args: Sequence[str] = (),
    custom_patterns: Mapping[str, str] | None = None,
)
Source code in src/robot/running/arguments/embedded.py 
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def __init__(self, name: re.Pattern,
             args: Sequence[str] = (),
             custom_patterns: 'Mapping[str, str]|None' = None):
    self.name = name
    self.args = tuple(args)
    self.custom_patterns = custom_patterns or None

validate 

validate(args: Sequence[Any])

Validate that embedded args match custom regexps.

Initial validation is done already when matching keywords, but this validation makes sure arguments match also if they are given as variables.

Currently, argument not matching only causes a deprecation warning, but that will be changed to ValueError in RF 8.0: #4069

Source code in src/robot/running/arguments/embedded.py 
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def validate(self, args: Sequence[Any]):
    """Validate that embedded args match custom regexps.

    Initial validation is done already when matching keywords, but this
    validation makes sure arguments match also if they are given as variables.

    Currently, argument not matching only causes a deprecation warning, but
    that will be changed to ``ValueError`` in RF 8.0:
    https://github.com/robotframework/robotframework/issues/4069
    """
    if not self.custom_patterns:
        return
    for name, value in zip(self.args, args):
        if name in self.custom_patterns and isinstance(value, str):
            pattern = self.custom_patterns[name]
            if not re.fullmatch(pattern, value):
                # TODO: Change to `raise ValueError(...)` in RF 8.0.
                context = EXECUTION_CONTEXTS.current
                context.warn(f"Embedded argument '{name}' got value {value!r} "
                             f"that does not match custom pattern {pattern!r}. "
                             f"The argument is still accepted, but this behavior "
                             f"will change in Robot Framework 8.0.")