/*
* Licensed 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.
*/
package com.facebook.presto.sql.planner;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.FunctionCall;
import com.facebook.presto.sql.tree.QualifiedName;
import com.facebook.presto.sql.tree.QualifiedNameReference;
import org.testng.Assert;
import org.testng.annotations.Test;
import java.util.Arrays;
public class TestDeterminismEvaluator
{
@Test
public void testSanity()
throws Exception
{
Assert.assertFalse(DeterminismEvaluator.isDeterministic(function("rand")));
Assert.assertFalse(DeterminismEvaluator.isDeterministic(function("random")));
Assert.assertTrue(DeterminismEvaluator.isDeterministic(function("abs", input("symbol"))));
Assert.assertFalse(DeterminismEvaluator.isDeterministic(function("abs", function("rand"))));
Assert.assertTrue(DeterminismEvaluator.isDeterministic(function("abs", function("abs", input("symbol")))));
}
private static FunctionCall function(String name, Expression... inputs)
{
return new FunctionCall(new QualifiedName(name), Arrays.asList(inputs));
}
private static QualifiedNameReference input(String symbol)
{
return new QualifiedNameReference(QualifiedName.of(symbol));
}
}