def METHOD_NAME():
    client = boto3.client("iot", region_name="us-east-1")
    resp = client.register_ca_certificate(
        caCertificate="ca_certificate",
        verificationCertificate="verification_certificate",
        setAsActive=True,
        registrationConfig={
            "templateBody": "template_b0dy",
            "roleArn": "aws:iot:arn:role/asdfqwerwe",
        },
    )
    describe = client.describe_ca_certificate(certificateId=resp["certificateId"])
    description = describe["certificateDescription"]
    assert description["certificateArn"] == resp["certificateArn"]
    assert description["certificateId"] == resp["certificateId"]
    assert description["status"] == "ACTIVE"
    assert description["certificatePem"] == "ca_certificate"
    config = describe["registrationConfig"]
    assert config["templateBody"] == "template_b0dy"
    assert config["roleArn"] == "aws:iot:arn:role/asdfqwerwe"