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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.tensor.functions;
import com.yahoo.tensor.Tensor;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* @author bratseth
*/
public class JoinTestCase {
/** Test the indexed subspace join optimization */
@Test
public void testJoinIndexedSubspace() {
Tensor t1, t2;
t1 = Tensor.from("tensor(x[]):{{x:0}:1.0,{x:1}:2.0}");
t2 = Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:10,{x:1,y:1,z:0}:0.0}");
assertEquals(Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:20.0,{x:1,y:1,z:0}:0.0}"),
t1.multiply(t2));
t1 = Tensor.from("tensor(x[]):{{x:0}:1.0,{x:1}:2.0}");
t2 = Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:10,{x:1,y:1,z:0}:0.0}");
assertEquals(Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:5.0,{x:1,y:1,z:0}:0.0}"),
t2.divide(t1));
t1 = Tensor.from("tensor(y[]):{{y:0}:1.0,{y:1}:2.0}");
t2 = Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:10,{x:1,y:1,z:0}:0.0}");
assertEquals(Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:10.0,{x:1,y:1,z:0}:0.0}"),
t1.multiply(t2));
t1 = Tensor.from("tensor(y[]):{{y:0}:1.0,{y:1}:2.0}");
t2 = Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:10,{x:1,y:1,z:0}:0.0}");
assertEquals(Tensor.from("tensor(x[],y[],z[]):{{x:0,y:0,z:0}:6,{x:0,y:1,z:0}:0.0,{x:1,y:0,z:0}:10.0,{x:1,y:1,z:0}:0.0}"),
t2.divide(t1));
}
@Test
public void testGeneralJoin() {
assertEquals(Tensor.from("tensor(x[],y[]):{ {x:0,y:0}:1, {x:1,y:0}:2, {x:2,y:0}:3 }"),
Tensor.from("tensor(x[]):{ {x:0}:2, {x:1}:4, {x:2}:6 }")
.divide(Tensor.from("tensor(y[]):{{y:0}:2}")));
assertEquals(Tensor.from("tensor(x[],y[],z[]):{ {x:0,y:0,z:0}:3, {x:1,y:0,z:0}:4, {x:0,y:1,z:0}:5, {x:1,y:1,z:0}:6 }"),
Tensor.from("tensor(x[],y[]):{ {x:0,y:0}:6, {x:1,y:0}:8, {x:0,y:1}:20, {x:1,y:1}:24 }")
.divide(Tensor.from("tensor(y[],z[]):{ {y:0,z:0}:2, {y:1,z:0}:4, {y:2,z:0}:6 }")));
}
}
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