Tests

Run tests matching CI configuration.

Commands by argument

unit or no argument — unit tests

./mvnw clean test -q -B -D"checkstyle.skip"

CI runs this on:

• JDK 11: ubuntu, macOS, Windows
• JDK 17, 21, 25: ubuntu only

integration — integration tests (excludes slow)

./mvnw -B clean integration-test -Dcheckstyle.skip -DskipUTs=true -DexcludedGroups=slow

CI runs this on JDK 11, 17, 21, 25 (ubuntu only).

slow — slow integration tests

./mvnw -B clean integration-test -Dcheckstyle.skip -DskipUTs=true \
  -Dit.test=org.apache.skywalking.library.elasticsearch.ElasticSearchIT \
  -Dfailsafe.failIfNoSpecifiedTests=false

CI runs on JDK 11 (ubuntu only). Currently only ElasticSearch/OpenSearch IT is in the slow matrix.

Module name — single module tests

# Unit tests for a specific module
./mvnw clean test -pl oap-server/analyzer/<module-name> -D"checkstyle.skip"

# Integration tests for a specific module
./mvnw -B clean integration-test -pl oap-server/analyzer/<module-name> -Dcheckstyle.skip -DskipUTs=true

Test frameworks

• JUnit 5 (org.junit.jupiter)
• Mockito for mocking
• AssertJ for assertions
• PowerMock for reflection utilities

Test naming conventions

Type	Pattern	Maven phase
Unit tests	*Test.java	test
Integration tests	IT*.java or *IT.java	integration-test

Slow test tagging

Tests tagged with @Tag("slow") are excluded from the normal integration-test job and run separately in the slow-integration-test job. Use this tag for tests that spin up external services (Elasticsearch, etc.) and take significant time.

CI retry behavior

All three CI jobs retry on failure (run the same command twice with ||). This handles flaky tests but masks intermittent issues — if a test fails locally, investigate rather than relying on retries.

CI reference

CI workflow: .github/workflows/skywalking.yaml

Job	JDK	OS	Timeout
unit-test	11 (3 OS) + 17, 21, 25 (ubuntu)	ubuntu, macOS, Windows	30 min
integration-test	11, 17, 21, 25	ubuntu	60 min
slow-integration-test	11	ubuntu	60 min