THE MAGIC BEHIND FASTER API DEVELOPMENT, TESTING AND DELIVERY WITH API VIRTUALIZATION

Presentedby:SmartBearCTO,OAIChairman,OleLensmar

@olensmar |@SmartBear

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The path to API Virtualization starts with…

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Stubbing / Static Mocking

• Staticresponses• Semanticallycorrect• Nologic• Payloadsgeneratedfromschemasorexamples

• Codeorgeneratedfrommetadata

• Usage:ClientandTestdevelopment

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Dynamic Mocking (Simulation)

• Dynamicresponses• Basedoninput• Re-useinputinoutput• Scripting

• Data-driven/Data-generation

• Simulatestate

• Usage:ScenarioTesting,Development

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API Virtualization

• Runtimebehaviorsimulation

• Runtimemanagement• RedirecttraffictoVirtualAPIsdynamically• Accesscontrol• Deployment

• Testexecutionintegration• Assertionsonincomingcontent

• Usage:Integration/ScenarioTesting,LoadTesting,Development

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A couple of use cases…

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Bootstrap Development

Virtualized APIGeneratefrom

specorwithtools

Client Development

Test Design

Integration Development

• ShortcuttheAPIdevelopmentcycle/process• Bridgedependenciesbetweenroles/teams• EnableearlyfeedbackonAPIdesign/implementation

Development

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Component Isolation during Dev and Test

Component in dev or test

TestExecution(automatedormanual)

3rd party APIs(virtualized)

Other APIs(virtualized)

Legacy Systems(virtualized)

Development

• Simulate(un)expectedbehavior• Minimizeimpactonandusageofexternalsystems• Assertusageofexternalcomponents

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Provide Sandbox for API consumers

Hardware / Software Solution

API Virtual API

Evaluate

Integrate

Integration Test

• Providesimulationsofdifferentusagescenarios• Minimizeusage/exposureofrealsystem• UnderstandhowcustomersinteractwithAPI

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Performance Testing with API dependencies

Solution under test

LoadTestExecution(automatedormanual)

3rd party APIs(virtualized)

Other APIs(virtualized)

Legacy Systems(virtualized)

• Simulate(un)expectedperformanceinexternalsystems• Minimizeimpactonandusageofexternalsystems• TriagePerformancebottlenecks

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Internal

Corp

Web app

Corp

App + API

API

API

API

Device

API

DeviceIoT

Device

IoTDevice

API

API

API

Component Evolution in complex architectures• Enableindependentevolutionofservicesbysimulating

externaldependenciesasservicesmovethroughlifecycle

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Virtualization across the API Lifecycle

Design Build Test Deploy Manage

Staticmocking

Dynamicmocking

APIVirtualization

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How create virtualized APIs?

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Create from API definition / contract

• Swagger/OAS,RAML,APIBlueprint,WSDL,WADL,etc.

• Integratedschemasorexamplesforpayloadgeneration

• StaticMockingoftenintegratedindesigntools

• Dedicatedtoolingcommon

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Create from captured API usage

• ConvertinterceptedAPIresponsesintovirtualAPIs• Log-files– limitedpayloaddata

• Capturedtrafficoftenneedstobe“refined”• Removal/changeofheaders• Removalofsensitivedata• Addedlogicforpropagationofvalues

• Recordnon-functionalaspects• Responsetimes,latency,etc.

• RecordSSLusingMITMwithdedicatedcertificate

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Refine with dedicated tooling

• Addcomplexlogicforrequestdispatching

• Adddata-drivenpayloads

• Simulatenon-functionalbehavior

• Addassertionsforvalidatingrequests

• Pass-throughtoactualAPIsasappropriate

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Considerations

• HowwillvirtualAPIsbeusedandmanaged• Local/Team/Enterprise

• Technicalproficiencyofmaintainers• Scripting/codingrequirements

• CI-Integration• HowredirectAPIcallstovirtualizedAPIs

• Accesscontrol(internal/external)

• ReportingandGovernance

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Virtualising Async APIs

• Domains• Web:Webhooks,Async SOAP,Websockets• Legacy:JMS,MQSeries,etc• IoT protocols:MQTT,AMQP,XMPP,etc

• VirtualizationNeeds• Simulatebothsenderandreceiverofevents• Coordinatedecoupledmessageflows/transactions• Simulatebothfunctionalandnon-functionalbehaviour

• Challengingtocoordinateorchestratedcomponents

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API Virtualization – do you need it?

• Localdevelopmentandbasiccomponenttesting–>Probablynot

• ForprovidingSandboxenvironments->Probably

• CollaborativeevolutionandtestingofAPIswithlownumberofdependencies->Maybe

• Thesame– butwithhighnumberofcomplexdependencies->Probably

• Forsimulatingbothfunctionalandnon-functionalbehaviorincomplexdistributedAPI-basedsolutions/architectures->Definitely

Thank you!

@olensmar @SmartBear