/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate licenses
* this file to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may
* obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.operation.predicate;
import io.crate.metadata.*;
import io.crate.operation.Input;
import io.crate.planner.RowGranularity;
import io.crate.planner.symbol.*;
import io.crate.types.DataType;
import io.crate.types.DataTypes;
import org.junit.Test;
import java.util.Arrays;
import static io.crate.testing.TestingHelpers.assertLiteralSymbol;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
public class IsNullPredicateTest {
IsNullPredicate predicate = new IsNullPredicate(new FunctionInfo(
new FunctionIdent(IsNullPredicate.NAME, Arrays.<DataType>asList(DataTypes.STRING)),
DataTypes.BOOLEAN
));
@Test
public void testNormalizeSymbolFalse() throws Exception {
Function isNull = new Function(predicate.info(), Arrays.<Symbol>asList(Literal.newLiteral("a")));
Symbol symbol = predicate.normalizeSymbol(isNull);
assertLiteralSymbol(symbol, false);
}
@Test
public void testNormalizeSymbolTrue() throws Exception {
Function isNull = new Function(predicate.info(), Arrays.<Symbol>asList(Literal.NULL));
Symbol symbol = predicate.normalizeSymbol(isNull);
assertLiteralSymbol(symbol, true);
}
@Test
public void testNormalizeReference() throws Exception {
Reference name_ref = new Reference(new ReferenceInfo(
new ReferenceIdent(new TableIdent(null, "dummy"), "name"),
RowGranularity.DOC,
DataTypes.STRING));
Function isNull = new Function(predicate.info(), Arrays.<Symbol>asList(name_ref));
Symbol symbol = predicate.normalizeSymbol(isNull);
assertThat(symbol, instanceOf(Function.class));
}
@Test
public void testNormalizeDynamicReference() throws Exception {
DynamicReference name_ref = new DynamicReference(new ReferenceInfo(
new ReferenceIdent(new TableIdent(null, "dummy"), "name"),
RowGranularity.DOC,
DataTypes.STRING));
Function isNull = new Function(predicate.info(), Arrays.<Symbol>asList(name_ref));
Symbol symbol = predicate.normalizeSymbol(isNull);
assertLiteralSymbol(symbol, true);
}
@Test
public void testNormalizeSymbolWithStringLiteralThatIsNull() throws Exception {
Function isNull = new Function(predicate.info(),
Arrays.<Symbol>asList(Literal.newLiteral(DataTypes.STRING, null)));
Symbol symbol = predicate.normalizeSymbol(isNull);
assertThat((Boolean) ((Input) symbol).value(), is(true));
}
@Test
public void testEvaluateWithInputThatReturnsNull() throws Exception {
Boolean result = predicate.evaluate(new Input[]{new Input() {
@Override
public Object value() {
return null;
}
}});
assertThat(result, is(true));
}
}