CODEWITHSUNDEEP
javaspring-cloudspring-cloud-streamspring-cloud-configspring-cloud-bus
ssmallya
ssmallya

Reputation: 133

Why spring-cloud-config sample test needs to spin a config-server?

I want to write unit/integration tests for my config server so I checked this link. There's a class annotated with @SpringBootTest and also a function startConfigServer() inside annotated with @BeforeClass. Why exactly is this function needed because there's the @SpringBootTest annotation?

And what other unit test cases and integration tests can I write for the config server? I'm also using Spring Cloud Stream Kafka and Spring Cloud Bus, along with Spring Security basic authentication enabled.

Upvotes: 0

Views: 341

Answers (1)

Loïc Le Doyen
Loïc Le Doyen

Reputation: 1055

Spring-cloud-bus is a mechanism for mutiple application nodes to communicate, offering the ability to broadcast events.
This communication in place, the application can use it, for example, to get the configuration from a configuration-server in a dynamic way (a change in configuration will lead to broadcasting the appropriate event).

So when testing such an application, the test must first provide a configuration-server to get the configuration from, hence the startConfigServer() method in the example you linked.

Spring blog references spring-cloud-stream-test-support to ease testing of this messaging abstraction, but I have not used it myself.

However, an other way to test this is to mock all accesses to this configuration-server (through HTTP and spring-cloud-stream underlying broker).

Here is an example of all the mocking stuff (using RabbitMQ, but the idea will be the same with Kafka).

Testing the configuration-server is just the other way around (modify a configuration file and assert that a message is published on the underlying broker).

For the record, I am not sure that spring-cloud-bus can be used with Kafka, as the official documentation says only AMQP (0.9) is supported : https://spring.io/projects/spring-cloud-bus

Upvotes: 1

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