Stream2 = builder.stream(topic2, consumed) Have you had a look at the Kafka Streams unit tests ? It's about piping in the data and checking the end result with a mock processor.įor example for the following stream join: stream1 = builder.stream(topic1, consumed) In the BankTests project, add a reference to the Bank project. The BankTests project is added to the Bank solution. Choose either the recommended target framework or. Name the project BankTests and click Next.
#Iunit testing code
So you'd have to do some copy-pasting into your own code base. In Visual Studio 2019 version 16.9, the MSTest project template is Unit Test Project. However, unless I am mistaken, the integration tests and their tooling are not included in the test utilities artifact of Kafka Streams (i.e., :kafka-streams-test-utils). (For what it's worth, there are further integration tests examples at, which includes tests that also cover Confluent Schema Registry when using Apache Avro as your data format, etc.) A concrete test example for joins is StreamTableJoinIntegrationTest (there are a few join related integration tests) with its parent AbstractJoinIntegrationTest.
See the integration tests for Kafka Streams in the Apache Kafka project, where EmbeddedKafkaCluster and IntegrationTestUtils are the center pieces for the tooling.
Effectively, this means you are changing your tests from unit tests to integration/system tests: your test will launch a full-fledged Kafka Streams topology that talks to the embedded Kafka cluster that runs on the same machine as your test. What I suggest is to use tests that spin up an embedded Kafka cluster, and then run your tests against that cluster using the "real" Kafka Streams engine (i.e., not the TopologyTestDriver). So i've been looking around for a solution for this but cant find any. This can indeed cause problems when trying to test, for example, certain joins because these operations depend on a certain processing order (e.g., in a stream-table join, the table should already have an entry for key 'alice' before a stream-side event for 'alice' arrives, otherwise the join output for the stream-side 'alice' will not include any table-side data). Notably, there are some differences in the processing order of new, incoming events. It seems not to be working.īy design, but unfortunately in your case, the TopologyTestDriver isn't a 100% accurate model of how the Kafka Streams engine works at runtime. ToEqualHtml() is then used to ensure the component renders as expected.I have a topology that does two kstream joins, the problem im facing is when trying to unit test with the TopologyTestDriver sending a couple of ConsumerRecords with pipeInput and then readOutput. M圜mp renders it sets its text content as "Success!". NewE2EPage() docs on more information about complete End-to-end testing with Puppeteer.īelow is a simple example where newSpecPage() is given one component class which was imported, and the initial HTML to use for the test.
#Iunit testing full
NewSpecPage() is much faster since it does not require a full NewSpecPage() imported This testing utility method is similar to In order to unit test a component as rendered HTML, tests can use To run unit tests, run stencil test -spec.
Well written tests are fast, repeatable, and easy to reason about. Unit tests validate the code in isolation. Stencil makes it easy to unit test components and app utility functions using
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