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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.update;
import com.yahoo.document.datatypes.TensorFieldValue;
import com.yahoo.document.update.TensorModifyUpdate.Operation;
import com.yahoo.tensor.Tensor;
import com.yahoo.tensor.TensorType;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import static org.junit.Assert.assertEquals;
public class TensorModifyUpdateTest {
@Rule
public ExpectedException exception = ExpectedException.none();
@Test
public void convert_to_compatible_type_with_only_mapped_dimensions() {
assertConvertToCompatible("tensor(x{})", "tensor(x[])");
assertConvertToCompatible("tensor(x{})", "tensor(x[10])");
assertConvertToCompatible("tensor(x{})", "tensor(x{})");
assertConvertToCompatible("tensor(x{},y{},z{})", "tensor(x[],y[10],z{})");
assertConvertToCompatible("tensor(x{},y{})", "tensor(x{},y[3])");
}
private static void assertConvertToCompatible(String expectedType, String inputType) {
assertEquals(expectedType, TensorModifyUpdate.convertDimensionsToMapped(TensorType.fromSpec(inputType)).toString());
}
@Test
public void use_of_incompatible_tensor_type_throws() {
exception.expect(IllegalArgumentException.class);
exception.expectMessage("Tensor type 'tensor(x[3])' is not compatible as it has no mapped dimensions");
new TensorModifyUpdate(TensorModifyUpdate.Operation.REPLACE,
new TensorFieldValue(Tensor.from("tensor(x[3])", "{{x:1}:3}")));
}
@Test
public void apply_modify_update_operations() {
assertApplyTo("tensor(x{},y{})", Operation.REPLACE,
"{{x:0,y:0}:1, {x:0,y:1}:2}", "{{x:0,y:1}:0}", "{{x:0,y:0}:1,{x:0,y:1}:0}");
assertApplyTo("tensor(x[1],y[2])", Operation.ADD,
"{{x:0,y:0}:1, {x:0,y:1}:2}", "{{x:0,y:1}:3}", "{{x:0,y:0}:1,{x:0,y:1}:5}");
assertApplyTo("tensor(x{},y[2])", Operation.MULTIPLY,
"{{x:0,y:0}:3, {x:0,y:1}:2}", "{{x:0,y:1}:3}", "{{x:0,y:0}:3,{x:0,y:1}:6}");
}
private void assertApplyTo(String spec, Operation op, String init, String update, String expected) {
TensorFieldValue initialFieldValue = new TensorFieldValue(Tensor.from(spec, init));
TensorModifyUpdate modifyUpdate = new TensorModifyUpdate(op, new TensorFieldValue(Tensor.from("tensor(x{},y{})", update)));
TensorFieldValue updatedFieldValue = (TensorFieldValue) modifyUpdate.applyTo(initialFieldValue);
assertEquals(Tensor.from(spec, expected), updatedFieldValue.getTensor().get());
}
}
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