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Automatically mocks resources from serverless.yml in pytest using moto.

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whisller/pytest-serverless

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Automatically mocks resources defined in serverless.yml file usingmoto and uses them inpytest.

This way you can focus on writing tests rather than defining enormous list of fixtures.

masterPyPIPythonpytestLicence
MasterPyPI6.2

Pre installation requirements

  • serverless installed
  • pytest installed

Installation

pip install pytest-serverless

Usage

Assuming yourserverless.yml file looks like:

service:my-microserviceresources:Resources:TableA:Type:'AWS::DynamoDB::Table'DeletionPolicy:DeleteProperties:TableName:${self:service}.my-tableAttributeDefinitions:         -AttributeName:idAttributeType:S         -AttributeName:company_idAttributeType:SKeySchema:         -AttributeName:idKeyType:HASHGlobalSecondaryIndexes:         -IndexName:company_idKeySchema:             -AttributeName:company_idKeyType:HASHProjection:ProjectionType:ALLProvisionedThroughput:ReadCapacityUnits:10WriteCapacityUnits:30ProvisionedThroughput:ReadCapacityUnits:10WriteCapacityUnits:30

Just mark your test with@pytest.mark.usefixtures("serverless") andpytest-serverless will automatically createmy-microservice.my-table dynamodb table.

importboto3importpytest@pytest.mark.usefixtures("serverless")deftest():table=boto3.resource("dynamodb").Table("my-microservice.my-table")count_of_items=len(table.scan()["Items"])assertcount_of_items==0

You can use a custom serverless file path setting the envionmnet variableSERVERLESS_FILE_PATH.

$export SERVERLESS_FILE_PATH=/path/to/serverless.yml

You can use choose bothsls orserverless command to run, settings the environment variableSERVERLESS_COMMAND. It will only accpetssls orserverless values.

$export SERVERLESS_COMMAND=sls

Supported resources

AWS::DynamoDB::Table

AWS::SQS::Queue

AWS::SNS::Topic

AWS::S3::Bucket

AWS::KMS::Key

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Automatically mocks resources from serverless.yml in pytest using moto.

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