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import json
import os
from functools import wraps
from time import sleep
from uuid import uuid4
import boto3
from botocore.exceptions import ClientError
from moto import mock_aws
def lambda_aws_verified(func):
"""
Function that is verified to work against AWS.
Can be run against AWS at any time by setting:
MOTO_TEST_ALLOW_AWS_REQUEST=true
If this environment variable is not set, the function runs in a `mock_aws` context.
This decorator will:
- Create an IAM-role that can be used by AWSLambda functions table
- Run the test
- Delete the role
"""
@wraps(func)
def pagination_wrapper(**kwargs):
role_name = "moto_test_role_" + str(uuid4())[0:6]
allow_aws_request = (
os.environ.get("MOTO_TEST_ALLOW_AWS_REQUEST", "false").lower() == "true"
)
if allow_aws_request:
return create_role_and_test(kwargs, role_name)
else:
with mock_aws():
return create_role_and_test(kwargs, role_name)
def create_role_and_test(kwargs, role_name):
from .test_lambda import _lambda_region
policy_doc = {
"Version": "2012-10-17",
"Statement": [
{
"Sid": "LambdaAssumeRole",
"Effect": "Allow",
"Principal": {"Service": "lambda.amazonaws.com"},
"Action": "sts:AssumeRole",
}
],
}
iam = boto3.client("iam", region_name=_lambda_region)
iam_role_arn = iam.create_role(
RoleName=role_name,
AssumeRolePolicyDocument=json.dumps(policy_doc),
Path="/",
)["Role"]["Arn"]
try:
# Role is not immediately available
check_iam_role_is_ready_to_use(iam_role_arn, role_name, _lambda_region)
kwargs["iam_role_arn"] = iam_role_arn
resp = func(**kwargs)
finally:
for policy in iam.list_attached_role_policies(RoleName=role_name)[
"AttachedPolicies"
]:
iam.detach_role_policy(
RoleName=role_name,
PolicyArn=policy["PolicyArn"],
)
iam.delete_role(RoleName=role_name)
return resp
def check_iam_role_is_ready_to_use(role_arn: str, role_name: str, region: str):
from .utilities import get_test_zip_file1
iam = boto3.client("iam", region_name=region)
# The waiter is normally used to wait until a resource is ready
wait_for_role = iam.get_waiter("role_exists")
wait_for_role.wait(RoleName=role_name)
# HOWEVER:
# Just because the role exists, doesn't mean it can be used by Lambda
# The only reliable way to check if our role is ready:
# - try to create a function and see if it succeeds
#
# The alternive is to wait between 5 and 10 seconds, which is not a great solution either
_lambda = boto3.client("lambda", region)
for _ in range(15):
try:
fn_name = f"fn_for_{role_name}"
_lambda.create_function(
FunctionName=fn_name,
Runtime="python3.11",
Role=role_arn,
Handler="lambda_function.lambda_handler",
Code={"ZipFile": get_test_zip_file1()},
)
# If it succeeded, our role is ready
_lambda.delete_function(FunctionName=fn_name)
return
except ClientError:
sleep(1)
raise Exception(
f"Couldn't create test Lambda FN using IAM role {role_name}, probably because it wasn't ready in time"
)
return pagination_wrapper
def delete_all_layer_versions(client, layer_name: str):
versions = client.list_layer_versions(LayerName=layer_name)["LayerVersions"]
for version in versions:
client.delete_layer_version(
LayerName=layer_name,
VersionNumber=version["Version"],
)
|
