Testing

Fixed clock with `%test`

The simplest approach is a fixed clock in the test profile:

%test.quarkus.clock.type=fixed
%test.quarkus.clock.fixed-instant=2000-01-01T00:00:00Z

Every call to clock.instant() then returns 2000-01-01T00:00:00Z.

Adjustable clock with `@TestProfile`

When a test must move time, override configuration with a QuarkusTestProfile:

import java.util.Map;

import org.junit.jupiter.api.Test;

import io.quarkus.test.junit.QuarkusTest;
import io.quarkus.test.junit.QuarkusTestProfile;
import io.quarkus.test.junit.TestProfile;

@QuarkusTest
@TestProfile(AdjustableClockTest.AdjustableProfile.class)
public class AdjustableClockTest {

    public static class AdjustableProfile implements QuarkusTestProfile {
        @Override
        public Map<String, String> getConfigOverrides() {
            return Map.of("quarkus.clock.type", "adjustable");
        }
    }

    @Test
    void timeCanBeMoved() {
        // Inject Clock, unwrap to AdjustableClock, then forward or travelTo.
    }
}

Inject Clock, unwrap it to AdjustableClock, then call forward, travelTo, or fixTo between assertions.