Microservices that accept been developed go through altered phases of testing afore it hits production. Once a account has anesthetized assemblage and affiliation tests, its time for the achievement test. Achievement tests will validate how a microservice will handle the accepted load. Ideally, all the testing phases are agitated out during a connected affiliation workflow.
In this commodity we will authenticate how to accomplish microservice achievement testing appliance k6 and Mountebank. To alpha with, let us accede an archetype area a microservice provides HTTP GET endpoint. A HTTP GET appeal to this endpoint will accommodate a acknowledgment based on accessory afterwards service, lets alarm it account B, as appearance in the beneath diagram.
To accomplish the amount test, k6 is acclimated for active the analysis scripts and Antic for biting the account B. The microservice has to be amount activated by biting all the abased interfaces. This can be done appliance Antic which is able to accommodate activating and delayed responses.
The accoutrement that are acclimated for amount testing are created for QA professionals and they are not developer affable tool. This accoutrement are circuitous GUI apprenticed based testing, appropriately amount testing has abundantly been aloof for a baby boyhood of enterprises to allow a specialized workforce.
Step 1: Prerequisites InstallFor installing and active this example, the arrangement needs the afterward accoutrement installed.
Step 2: K6 InstallK6 can be installed appliance beverage or docker. For this archetype we are appliance brew
Step 3: Grafana Install (Optional)This install is appropriate if the analysis after-effects charge to be beheld in Grafana. For Grafana dashboard bureaucracy chase this Link
docker-compose up -d influxdb grafana
Step 4: Project StructureGet the antecedent cipher for this appliance from GitHub
imposter.ejsThis contains a account of actor files based on the cardinal of casework to be mocked. As per the example, Account B is acclimated by the Microservice and this account will be mocked by Mountebank.
serviceBImposters.ejsThis contains a which defines how to acknowledge to admission requests. This actor makes antic to acknowledge to http requests on anchorage 4545. A uses predicates to ascertain the rules area the requests are mapped in accouterment agnate responses. In this stub, it will attending for a GET appeal on a authentic aisle “/api”. It will again acknowledgment a 200 acknowledgment afterwards 500ms. The “wait” aspect is acclimated to adjournment the response.
config.jsonIt represents the k6 agreement to accommodate options to configure how k6 will behave during analysis execution. Here “vus” specifies the cardinal of basic user to run accordingly and “iterations” specifies the anchored cardinal of iterations to assassinate of the script.
scripts.jsThis is the amount analysis cipher which defines the HTTP requests that will be acclimated to analysis the micorservice. Here the appeal is a simple GET appeal and blockage for 200 in the acknowledgment status.
Step 5: From the performance_test folder, on a new terminal affair run the beneath command to install all the bulge dependencies authentic in package.json
Step 6: On a terminal affair run the beneath command to alpha the Microservice to be tested
Step 7: On addition terminal affair run the beneath command to alpha up antic which is biting the Account B
Step 8: All set and now its time to run the achievement test. Lets activate the analysis by active the beneath command on addition terminal session. It will alpha hitting Microservice with cardinal of users configured in config.json. The after-effects will be displayed on the console.
The beneath screenshot provides the affectionate of metrics k6 collects automatically. It consists of http and abstracts metrics calm on active the test. The metrics to be noticed are
Step 9: Run this beneath command if Grafana has been installed and configured as per the aloft instructions. The metrics can be accessed by http://localhost:3000/
This blueprint uses InfluxDB for abstracts accumulator and Grafana for visualization.
In this article, we accept apparent how K6 and Antic can be acclimated for achievement testing a microservice. This is advised to accomplish amount testing as simple as possible. It is aimed for both testers and developers and allows testing of micorservices during the aboriginal stages of the development cycle. When amount tests of apparatus are defined, it can be allotment of Connected Affiliation and Delivery.
Happy Achievement Testing …
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