test: add test to verify health reports

Test verify that initial state is unhealthy
Test verify that on no disk space it is unhealthy
Test verify that on disk space free after empty it is healthy again

Related to #6232

(cherry picked from commit a8006f7)

broker/src/test/java/io/camunda/zeebe/broker/system/partitions/ZeebePartitionTest.java

@@ -43,6 +43,7 @@
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
+import org.mockito.ArgumentCaptor;
 import org.mockito.InOrder;
 
 public class ZeebePartitionTest {
@@ -351,6 +352,69 @@ public void shouldCloseZeebePartitionWhileOngoingTransition() {
     Awaitility.await().until(closeFuture::isDone);
   }
 
+  @Test
+  public void shouldReportUnhealthyPerDefault() {
+    // given
+    final var captor = ArgumentCaptor.forClass(ZeebePartitionHealth.class);
+    schedulerRule.submitActor(partition);
+    partition.onNewRole(Role.LEADER, 1);
+    schedulerRule.workUntilDone();
+
+    // when
+    schedulerRule.workUntilDone();
+
+    // then
+    verify(healthMonitor).registerComponent(any(), captor.capture());
+
+    final var zeebePartitionHealth = captor.getValue();
+    final HealthReport healthReport = zeebePartitionHealth.getHealthReport();
+    assertThat(healthReport.getStatus()).isEqualTo(HealthStatus.UNHEALTHY);
+    assertThat(healthReport.getIssue().message()).contains("Initial state");
+  }
+
+  @Test
+  public void shouldReportUnhealthyWhenNoDiskAvailable() {
+    // given
+    final var captor = ArgumentCaptor.forClass(ZeebePartitionHealth.class);
+    schedulerRule.submitActor(partition);
+    partition.onNewRole(Role.LEADER, 1);
+    schedulerRule.workUntilDone();
+
+    // when
+    partition.onDiskSpaceNotAvailable();
+    schedulerRule.workUntilDone();
+
+    // then
+    verify(healthMonitor).registerComponent(any(), captor.capture());
+
+    final var zeebePartitionHealth = captor.getValue();
+    final HealthReport healthReport = zeebePartitionHealth.getHealthReport();
+    assertThat(healthReport.getStatus()).isEqualTo(HealthStatus.UNHEALTHY);
+    assertThat(healthReport.getIssue().message()).contains("Not enough disk space available");
+  }
+
+  @Test
+  public void shouldReportHealthyWhenDiskIsAvailableAgain() {
+    // given
+    final var captor = ArgumentCaptor.forClass(ZeebePartitionHealth.class);
+    schedulerRule.submitActor(partition);
+    partition.onNewRole(Role.LEADER, 1);
+    partition.onDiskSpaceNotAvailable();
+    schedulerRule.workUntilDone();
+
+    // when
+    partition.onDiskSpaceAvailable();
+    schedulerRule.workUntilDone();
+
+    // then
+    verify(healthMonitor).registerComponent(any(), captor.capture());
+
+    final var zeebePartitionHealth = captor.getValue();
+    final HealthReport healthReport = zeebePartitionHealth.getHealthReport();
+    assertThat(healthReport.getStatus()).isEqualTo(HealthStatus.HEALTHY);
+    assertThat(healthReport.getIssue()).isNull();
+  }
+
   private static class NoopStartupStep implements PartitionStartupStep {
 
     @Override