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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.tensor.serialization;
import com.google.common.collect.Sets;
import com.yahoo.tensor.MapTensor;
import com.yahoo.tensor.Tensor;
import org.junit.Test;
import java.util.Arrays;
import java.util.Set;
import static org.junit.Assert.assertEquals;
/**
* Tests for the compact binary format.
*
* TODO: When new formats are added we should refactor this test to test all formats
* with the same set of tensor inputs (if feasible).
*
* @author <a href="mailto:geirst@yahoo-inc.com">Geir Storli</a>
*/
public class CompactBinaryFormatTestCase {
private static void assertSerialization(String tensorString) {
assertSerialization(MapTensor.from(tensorString));
}
private static void assertSerialization(String tensorString, Set<String> dimensions) {
Tensor tensor = MapTensor.from(tensorString);
assertEquals(dimensions, tensor.dimensions());
assertSerialization(tensor);
}
private static void assertSerialization(Tensor tensor) {
byte[] encodedTensor = TypedBinaryFormat.encode(tensor);
Tensor decodedTensor = TypedBinaryFormat.decode(encodedTensor);
assertEquals(tensor, decodedTensor);
}
@Test
public void testSerializationOfTensorsWithDenseTensorAddresses() {
assertSerialization("{}");
assertSerialization("{{x:0}:2.0}");
assertSerialization("{{x:0}:2.0,{x:1}:3.0}");
assertSerialization("{{x:0,y:0}:2.0}");
assertSerialization("{{x:0,y:0}:2.0,{x:0,y:1}:3.0}");
assertSerialization("{{y:0,x:0}:2.0}");
assertSerialization("{{y:0,x:0}:2.0,{y:1,x:0}:3.0}");
assertSerialization("{{dimX:labelA,dimY:labelB}:2.0,{dimY:labelC,dimX:labelD}:3.0}");
}
@Test
public void testSerializationOfTensorsWithSparseTensorAddresses() {
assertSerialization("{{x:0}:2.0, {}:3.0}", Sets.newHashSet("x"));
assertSerialization("({{y:-}:1} * {{x:0}:2.0})", Sets.newHashSet("x", "y"));
assertSerialization("({{y:-}:1} * {{x:0}:2.0, {}:3.0})", Sets.newHashSet("x", "y"));
assertSerialization("({{y:-}:1} * {{x:0}:2.0,{x:1}:3.0})", Sets.newHashSet("x", "y"));
assertSerialization("({{z:-}:1} * {{x:0,y:0}:2.0})", Sets.newHashSet("x", "y", "z"));
assertSerialization("({{z:-}:1} * {{x:0,y:0}:2.0,{x:0,y:1}:3.0})", Sets.newHashSet("x", "y", "z"));
assertSerialization("({{z:-}:1} * {{y:0,x:0}:2.0})", Sets.newHashSet("x", "y", "z"));
assertSerialization("({{z:-}:1} * {{y:0,x:0}:2.0,{y:1,x:0}:3.0})", Sets.newHashSet("x", "y", "z"));
assertSerialization("({{z:-}:1} * {{}:2.0,{x:0}:3.0,{x:0,y:0}:5.0})", Sets.newHashSet("x", "y", "z"));
}
@Test
public void requireThatCompactSerializationFormatDoNotChange() {
byte[] encodedTensor = new byte[] {1, // binary format type
2, // num dimensions
2, (byte)'x', (byte)'y', 1, (byte)'z', // dimensions
2, // num cells,
2, (byte)'a', (byte)'b', 0, 64, 0, 0, 0, 0, 0, 0, 0, // cell 0
2, (byte)'c', (byte)'d', 1, (byte)'e', 64, 8, 0, 0, 0, 0, 0, 0}; // cell 1
assertEquals(Arrays.toString(encodedTensor),
Arrays.toString(TypedBinaryFormat.encode(MapTensor.from("{{xy:ab}:2.0,{xy:cd,z:e}:3.0}"))));
}
}
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