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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.brooklyn.entity.nosql.cassandra;
import static org.testng.Assert.assertEquals;
import java.math.BigInteger;
import org.apache.brooklyn.entity.nosql.cassandra.TokenGenerators.AbstractTokenGenerator;
import org.apache.brooklyn.entity.nosql.cassandra.TokenGenerators.PosNeg63TokenGenerator;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
public class PosNegTokenGeneratorTest {
// TODO Expect this behaviour to change when we better support dynamically growing/shrinking.
// In particular, the expected behaviour for testReturnsNullWhenClusterSizeUnknown
// and testReturnsNullWhenGrowingClusterUnknownAmount will change.
private AbstractTokenGenerator generator;
@BeforeMethod(alwaysRun=true)
public void setUp() throws Exception {
generator = new PosNeg63TokenGenerator();
}
@Test
public void testGetTokenForReplacementNode() {
assertEquals(generator.getTokenForReplacementNode(BigInteger.ONE), BigInteger.ZERO);
assertEquals(generator.getTokenForReplacementNode(BigInteger.ZERO), BigInteger.ONE.negate());
assertEquals(generator.getTokenForReplacementNode(generator.min()), generator.max());
assertEquals(generator.getTokenForReplacementNode(generator.max()), generator.max().subtract(BigInteger.ONE));
}
@Test
public void testGeneratesInitialTokens() throws Exception {
generator.growingCluster(4);
assertEquals(generator.newToken(), generator.min());
assertEquals(generator.newToken(), generator.min().add(generator.range().divide(BigInteger.valueOf(4))));
}
}