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package com.yahoo.tensor;
import com.google.common.collect.ImmutableList;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* Tests functionality on Tensor
*
* @author bratseth
*/
public class TensorTestCase {
/** This is mostly tested in searchlib - spot checking here */
@Test
public void testTensorComputation() {
MapTensor tensor1 = MapTensor.from("{ {x:1}:3, {x:2}:7 }");
MapTensor tensor2 = MapTensor.from("{ {y:1}:5 }");
assertEquals(MapTensor.from("{ {x:1,y:1}:15, {x:2,y:1}:35 }"), tensor1.multiply(tensor2));
assertEquals(MapTensor.from("{ {x:1,y:1}:12, {x:2,y:1}:28 }"), tensor1.join(tensor2, (a, b) -> a * b - a ));
assertEquals(MapTensor.from("{ {x:1,y:1}:0, {x:2,y:1}:1 }"), tensor1.larger(tensor2));
assertEquals(MapTensor.from("{ {y:1}:50.0 }"), tensor1.matmul(tensor2, "x"));
assertEquals(MapTensor.from("{ {z:1}:3, {z:2}:7 }"), tensor1.rename("x", "z"));
assertEquals(MapTensor.from("{ {y:1,x:1}:8, {y:2,x:1}:12 }"), tensor1.add(tensor2).rename(ImmutableList.of("x", "y"),
ImmutableList.of("y", "x")));
}
}
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