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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.tensor;
import org.junit.Test;
import java.util.Set;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Basic tensor tests. Tensor operations are tested in EvaluationTestCase
*
* @author bratseth
*/
public class MappedTensorTestCase {
@Test
public void testEmpty() {
TensorType type = new TensorType.Builder().mapped("x").build();
Tensor empty = Tensor.Builder.of(type).build();
assertTrue(empty instanceof MappedTensor);
assertTrue(empty.isEmpty());
assertEquals("tensor(x{}):{}", empty.toString());
Tensor emptyFromString = Tensor.from(type, "{}");
assertEquals("tensor(x{}):{}", Tensor.from("tensor(x{}):{}").toString());
assertTrue(emptyFromString.isEmpty());
assertTrue(emptyFromString instanceof MappedTensor);
assertEquals(empty, emptyFromString);
}
@Test
public void testOneDimensionalBuilding() {
TensorType type = new TensorType.Builder().mapped("x").build();
Tensor tensor = Tensor.Builder.of(type).
cell().label("x", "0").value(1).
cell().label("x", "1").value(2).build();
assertEquals(Set.of("x"), tensor.type().dimensionNames());
assertEquals("tensor(x{}):{0:1.0, 1:2.0}", tensor.toString());
}
@Test
public void testTwoDimensionalBuilding() {
TensorType type = new TensorType.Builder().mapped("x").mapped("y").build();
Tensor tensor = Tensor.Builder.of(type).
cell().label("x", "0").label("y", "0").value(1).
cell().label("x", "1").label("y", "0").value(2).build();
assertEquals(Set.of("x", "y"), tensor.type().dimensionNames());
assertEquals("tensor(x{},y{}):{{x:0,y:0}:1.0, {x:1,y:0}:2.0}", tensor.toString());
}
}
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