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LoadBalancingCornerCasesTest.java
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LoadBalancingCornerCasesTest.java
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package io.vertx.core.loadbalancing;
import io.vertx.core.net.SocketAddress;
import io.vertx.core.net.endpoint.*;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import static org.junit.Assert.assertEquals;
@RunWith(Parameterized.class)
public class LoadBalancingCornerCasesTest {
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][]{
{LoadBalancer.ROUND_ROBIN},
{LoadBalancer.LEAST_REQUESTS},
{LoadBalancer.RANDOM},
{LoadBalancer.POWER_OF_TWO_CHOICES},
});
}
private final LoadBalancer loadBalancer;
public LoadBalancingCornerCasesTest(LoadBalancer loadBalancer) {
this.loadBalancer = loadBalancer;
}
@Test
public void testCornerCases() {
List<EndpointNode> instances = new ArrayList<>();
EndpointSelector selector = loadBalancer.selector(instances);
// Randomness is involved in some policies.
for (int i = 0; i < 1000; i++) {
assertEquals(-1, selector.select());
}
EndpointNode instance = new EndpointNode() {
InteractionMetrics<?> metrics = loadBalancer.newMetrics();
@Override
public SocketAddress address() {
return null;
}
@Override
public Object unwrap() {
return null;
}
@Override
public String key() {
return "";
}
@Override
public InteractionMetrics<?> metrics() {
return metrics;
}
@Override
public EndpointInteraction newInteraction() {
return null;
}
};
instances.add(instance);
for (int i = 0; i < 1000; i++) {
assertEquals(0, selector.select());
}
}
}