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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.searchlib.rankingexpression.evaluation.gbdtoptimization;
import com.yahoo.io.IOUtils;
import com.yahoo.searchlib.rankingexpression.RankingExpression;
import com.yahoo.searchlib.rankingexpression.evaluation.ArrayContext;
import com.yahoo.searchlib.rankingexpression.evaluation.ExpressionOptimizer;
import com.yahoo.searchlib.rankingexpression.parser.ParseException;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import static org.junit.Assert.assertEquals;
/**
* This tests reuse of a optimized context which is not initialized with
* all values referenced in the expression.
*
* @author bratseth
*/
public class ContextReuseTestCase {
private String contextString =
"ORDER_IN_CLUSTER = 2.0\n" +
"GOOD_SYNTAX = 1.0\n" +
"TERM_CASE_4 = 1.0\n" +
"LENGTH = 6.0\n";
private static final double delta = 0.00000001;
@Test
public void testIt() throws ParseException, IOException {
// Prepare
RankingExpression expression = new RankingExpression(IOUtils.readFile(new File("src/test/files/s-expression.vre")));
ArrayContext contextPrototype = new ArrayContext(expression);
new ExpressionOptimizer().optimize(expression, contextPrototype);
assertExecution(expression, contextPrototype);
assertExecution(expression, contextPrototype); // reuse
}
private void assertExecution(RankingExpression expression, ArrayContext contextPrototype) {
ArrayContext context = contextPrototype.clone();
for (String contextValueString : contextString.split("\n")) {
String[] contextValueParts = contextValueString.split("=");
context.put(contextValueParts[0].trim(), Double.valueOf(contextValueParts[1].trim()));
}
assertEquals("Context values not set are initialized to 0 doubles",
0.0, context.get("CHUNKTYPE").asDouble(), delta);
assertEquals(-2.3450294999999994, expression.evaluate(context).asDouble(), delta);
}
}
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