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Writing tests

You can use the zeebe-test module to write JUnit tests for your job worker and BPMN process. It provides a JUnit rule to bootstrap the broker and some basic assertions.

Usage in a Maven project​

Add zeebe-test as Maven test dependency to your project:

<dependency>
<groupId>io.camunda</groupId>
<artifactId>zeebe-test</artifactId>
<scope>test</scope>
</dependency>

Bootstrap the broker​

Use the ZeebeTestRule in your test case to start an embedded broker. It contains a client which can be used to deploy a BPMN process or create an instance.

import io.camunda.zeebe.client.ZeebeClient;
import io.camunda.zeebe.client.api.response.ProcessInstanceEvent;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;

public class MyTest {

@Rule public final ZeebeTestRule testRule = new ZeebeTestRule();

private ZeebeClient client;

@Test
public void test() {
client = testRule.getClient();

client
.newDeployCommand()
.addResourceFromClasspath("process.bpmn")
.send()
.join();

final ProcessInstanceEvent processInstance =
client
.newCreateInstanceCommand()
.bpmnProcessId("process")
.latestVersion()
.send()
.join();
}
}

Verify the Result​

The ZeebeTestRule provides also some basic assertions in AssertJ style. The entry point of the assertions is ZeebeTestRule.assertThat(...).

final ProcessInstanceEvent processInstance = ...

ZeebeTestRule.assertThat(processInstance)
.isEnded()
.hasPassed("start", "task", "end")
.hasVariable("result", 21.0);