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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.ranking;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
/**
* @author arnej
*/
public class NormalizerTestCase {
@Test
void requireLinearNormalizing() {
var n = new LinearNormalizer("foo", "bar", 10);
assertEquals(0, n.addInput(-4.0));
assertEquals(1, n.addInput(-1.0));
assertEquals(2, n.addInput(-5.0));
assertEquals(3, n.addInput(-3.0));
n.normalize();
assertEquals(0.0, n.getOutput(2));
assertEquals(0.25, n.getOutput(0));
assertEquals(0.5, n.getOutput(3));
assertEquals(1.0, n.getOutput(1));
assertEquals("foo", n.name());
assertEquals("bar", n.input());
assertEquals("linear", n.normalizing());
}
@Test
void requireReciprocalNormalizing() {
var n = new ReciprocalRankNormalizer("foo", "bar", 10, 0.0);
assertEquals(0, n.addInput(-4.1));
assertEquals(1, n.addInput(11.0));
assertEquals(2, n.addInput(-50.0));
assertEquals(3, n.addInput(-3.0));
n.normalize();
assertEquals(0.25, n.getOutput(2));
assertEquals(0.3333333, n.getOutput(0), 0.00001);
assertEquals(0.5, n.getOutput(3));
assertEquals(1.0, n.getOutput(1));
assertEquals("foo", n.name());
assertEquals("bar", n.input());
assertEquals("reciprocal-rank{k:0.0}", n.normalizing());
}
@Test
void requireReciprocalNormalizingWithK() {
var n = new ReciprocalRankNormalizer("foo", "bar", 10, 4.2);
assertEquals(0, n.addInput(-4.1));
assertEquals(1, n.addInput(11.0));
assertEquals(2, n.addInput(-50.0));
assertEquals(3, n.addInput(-3.0));
n.normalize();
assertEquals(1.0/8.2, n.getOutput(2));
assertEquals(1.0/7.2, n.getOutput(0), 0.00001);
assertEquals(1.0/6.2, n.getOutput(3));
assertEquals(1.0/5.2, n.getOutput(1));
assertEquals("foo", n.name());
assertEquals("bar", n.input());
assertEquals("reciprocal-rank{k:4.2}", n.normalizing());
}
}
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