def validate_subnets()

in pce/validator/validation_suite.py [0:0]

• 18 lines of code
• 5 McCabe index (conditional complexity)

    def validate_subnets(self, pce: PCE) -> ValidationResult:
        """
        Check that all subnets make use of every AZ in the VPC region
        """
        region_azs = set(self.ec2_gateway.describe_availability_zones())
        used_azs = {s.availability_zone for s in pce.pce_network.subnets}
        # There can't be a case where AZs are used and are not among the region AZs
        is_valid = region_azs == used_azs
        return (
            ValidationResult(ValidationResultCode.SUCCESS)
            if is_valid
            else ValidationResult(
                ValidationResultCode.ERROR,
                ValidationErrorDescriptionTemplate.NOT_ALL_AZ_USED.value.format(
                    region=pce.pce_network.region,
                    azs=",".join(sorted(used_azs)) if used_azs else "none",
                ),
                ValidationErrorSolutionHintTemplate.NOT_ALL_AZ_USED.value.format(
                    azs=",".join(sorted(region_azs - used_azs)),
                ),
            )
        )