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package feign;
import com.google.common.base.Ticker;
import org.testng.annotations.Test;
import java.util.Date;
import feign.Retryer.Default;
import static org.testng.Assert.assertEquals;
@Test
public class DefaultRetryerTest {
@Test(expectedExceptions = RetryableException.class)
public void only5TriesAllowedAndExponentialBackoff() throws Exception {
RetryableException e = new RetryableException(null, null, null);
Default retryer = new Retryer.Default();
assertEquals(retryer.attempt, 1);
assertEquals(retryer.sleptForNanos, 0);
retryer.continueOrPropagate(e);
assertEquals(retryer.attempt, 2);
assertEquals(retryer.sleptForNanos, 75000000);
retryer.continueOrPropagate(e);
assertEquals(retryer.attempt, 3);
assertEquals(retryer.sleptForNanos, 187500000);
retryer.continueOrPropagate(e);
assertEquals(retryer.attempt, 4);
assertEquals(retryer.sleptForNanos, 356250000);
retryer.continueOrPropagate(e);
assertEquals(retryer.attempt, 5);
assertEquals(retryer.sleptForNanos, 609375000);
retryer.continueOrPropagate(e);
// fail
}
@Test public void considersRetryAfterButNotMoreThanMaxPeriod() throws Exception {
Default retryer = new Retryer.Default();
retryer.ticker = epoch;
retryer.continueOrPropagate(new RetryableException(null, null, new Date(5000)));
assertEquals(retryer.attempt, 2);
assertEquals(retryer.sleptForNanos, 1000000000);
}
static Ticker epoch = new Ticker() {
@Override
public long read() {
return 0;
}
};
}