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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.vespa.indexinglanguage;
import com.yahoo.document.datatypes.IntegerFieldValue;
import com.yahoo.vespa.indexinglanguage.expressions.*;
import com.yahoo.vespa.indexinglanguage.parser.ParseException;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
/**
* @author <a href="mailto:magnarn@yahoo-inc.com">Magnar Nedland</a>
*/
public class ExpressionOptimizerTestCase {
@Test
public void requireThatSimpleExpressionsAreNotChanged() {
assertNotOptimized("input foo");
}
@Test
public void requireThatStatementsBeforeOneThatIgnoresInputAreRemoved() {
checkStatementThatIgnoresInput(new InputExpression("foo"));
checkStatementThatIgnoresInput(new NowExpression());
checkStatementThatIgnoresInput(new ConstantExpression(new IntegerFieldValue(42)));
checkStatementThatIgnoresInput(new HostNameExpression());
checkStatementThatIgnoresInput(new RandomExpression(42));
checkStatementThatIgnoresInput(new ArithmeticExpression(
new NowExpression(), ArithmeticExpression.Operator.ADD, new NowExpression()));
checkStatementThatIgnoresInput(new CatExpression(new NowExpression(), new NowExpression()));
checkStatementThatIgnoresInput(new ParenthesisExpression(new NowExpression()));
assertOptimized("input foo | (trim | now)", "(now)");
assertOptimized("input foo | get_var bar", "get_var bar");
assertOptimized("1 | index foo | now | 0", "1 | index foo | 0");
}
@Test
public void requireThatStatementsBeforeOneThatConsidersInputAreKept() {
assertNotOptimized("input foo | random");
assertNotOptimized("input foo | trim + now");
assertNotOptimized("input foo | (trim + now) - now");
assertNotOptimized("input foo | (now . trim)");
assertNotOptimized("input foo | (trim)");
assertNotOptimized("input foo | (trim | trim)");
assertNotOptimized("input foo | switch {case 'bar': now; case 'foo': now; }");
assertNotOptimized("{ input test | { summary test; }; }");
assertNotOptimized("1 | set_var foo | 0 | set_var bar");
assertNotOptimized("1 | index foo | 0 | index bar");
assertNotOptimized("1 | echo | 0 | echo");
assertNotOptimized("'foo' | if (1 < 2) { now | summary } else { 42 | summary } | summary");
assertNotOptimized("{ 0 | set_var tmp; " +
" input foo | split ';' | for_each { to_int + get_var tmp | set_var tmp };" +
" get_var tmp | attribute bar; }");
assertNotOptimized("0 | set_var tmp | " +
"input foo | split ';' | for_each { to_int + get_var tmp | set_var tmp } | " +
"get_var tmp | attribute bar");
}
private void checkStatementThatIgnoresInput(Expression exp) {
assertOptimized(new StatementExpression(new InputExpression("xyzzy"), exp), exp);
assertOptimized(new StatementExpression(new InputExpression("xyzzy"), exp, new LowerCaseExpression()),
new StatementExpression(exp, new LowerCaseExpression()));
}
private void assertOptimized(Expression input, Expression expected) {
assertEquals(expected.toString(), new ExpressionOptimizer().convert(input).toString());
}
private void assertOptimized(String input, String expected) {
try {
assertOptimized(Expression.fromString(input), Expression.fromString(expected));
} catch (ParseException e) {
fail(e.getMessage());
}
}
private void assertNotOptimized(String script) {
assertOptimized(script, script);
}
}
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