@Test
public void roundRobinWithSingleSlave() {
// Given
SlavePriority roundRobin = SlavePriorities.roundRobin();
// When
Iterator<Slave> slaves = roundRobin.prioritize(slaves(2)).iterator();
// Then
assertEquals(2, slaves.next().getServerId());
}
@Test
public void roundRobinWithNoSlaves() {
// Given
SlavePriority roundRobin = SlavePriorities.roundRobin();
// When
Iterator<Slave> slaves = roundRobin.prioritize(slaves()).iterator();
// Then
assertFalse(slaves.hasNext());
}
@Test
public void roundRobinWithTwoSlavesAndPushFactorTwo() {
// Given
SlavePriority roundRobin = SlavePriorities.roundRobin();
// When
Iterator<Slave> slaves = roundRobin.prioritize(slaves(2, 3)).iterator();
// Then
assertEquals(2, slaves.next().getServerId());
assertEquals(3, slaves.next().getServerId());
}
@Test
public void roundRobinWithTwoSlavesAndPushFactorOneWhenSlaveIsRemoved() {
// Given
SlavePriority roundRobin = SlavePriorities.roundRobin();
// When
Slave slave1 = roundRobin.prioritize(slaves(2, 3, 4)).iterator().next();
Slave slave2 = roundRobin.prioritize(slaves(2, 3, 4)).iterator().next();
Slave slave3 = roundRobin.prioritize(slaves(2, 3)).iterator().next();
// Then
assertEquals(2, slave1.getServerId());
assertEquals(3, slave2.getServerId());
assertEquals(2, slave3.getServerId());
}
