/*
* 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.operator;
import com.facebook.presto.Session;
import com.facebook.presto.spi.Page;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.testing.MaterializedResult;
import com.facebook.presto.util.IterableTransformer;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import java.util.Iterator;
import java.util.List;
import static com.facebook.presto.operator.PageAssertions.assertPageEquals;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static io.airlift.testing.Assertions.assertEqualsIgnoreOrder;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
public final class OperatorAssertion
{
private OperatorAssertion()
{
}
public static List<Page> appendSampleWeight(List<Page> input, final int sampleWeight)
{
return IterableTransformer.on(input).transform(new Function<Page, Page>()
{
@Override
public Page apply(Page page)
{
BlockBuilder builder = BIGINT.createBlockBuilder(new BlockBuilderStatus());
for (int i = 0; i < page.getPositionCount(); i++) {
BIGINT.writeLong(builder, sampleWeight);
}
Block[] blocks = new Block[page.getChannelCount() + 1];
System.arraycopy(page.getBlocks(), 0, blocks, 0, page.getChannelCount());
blocks[blocks.length - 1] = builder.build();
return new Page(blocks);
}
}).list();
}
public static List<Page> toPages(Operator operator, Iterator<Page> input)
{
ImmutableList.Builder<Page> outputPages = ImmutableList.builder();
while (input.hasNext()) {
Page inputPage = input.next();
// read output until input is needed or operator is finished
int nullPages = 0;
while (!operator.needsInput() && !operator.isFinished()) {
Page outputPage = operator.getOutput();
if (outputPage == null) {
// break infinite loop due to null pages
assertTrue(nullPages < 1_000_000, "Too many null pages; infinite loop?");
nullPages++;
}
else {
outputPages.add(outputPage);
nullPages = 0;
}
}
if (operator.isFinished()) {
break;
}
assertEquals(operator.needsInput(), true);
operator.addInput(inputPage);
Page outputPage = operator.getOutput();
if (outputPage != null) {
outputPages.add(outputPage);
}
}
// finish
operator.finish();
assertEquals(operator.needsInput(), false);
// add remaining output pages
addRemainingOutputPages(operator, outputPages);
return outputPages.build();
}
public static List<Page> toPages(Operator operator, List<Page> input)
{
// verify initial state
assertEquals(operator.isFinished(), false);
assertEquals(operator.needsInput(), true);
assertEquals(operator.getOutput(), null);
return toPages(operator, input.iterator());
}
public static List<Page> toPages(Operator operator)
{
// operator does not have input so should never require input
assertEquals(operator.needsInput(), false);
ImmutableList.Builder<Page> outputPages = ImmutableList.builder();
addRemainingOutputPages(operator, outputPages);
return outputPages.build();
}
private static void addRemainingOutputPages(Operator operator, ImmutableList.Builder<Page> outputPages)
{
// pull remaining output pages
while (true) {
// at this point the operator should not need more input
assertEquals(operator.needsInput(), false);
Page outputPage = operator.getOutput();
if (outputPage == null) {
break;
}
outputPages.add(outputPage);
}
// verify final state
assertEquals(operator.isFinished(), true);
assertEquals(operator.needsInput(), false);
assertEquals(operator.getOutput(), null);
}
public static MaterializedResult toMaterializedResult(Session session, List<Type> types, List<Page> pages)
{
// materialize pages
MaterializedResult.Builder resultBuilder = MaterializedResult.resultBuilder(session, types);
for (Page outputPage : pages) {
resultBuilder.page(outputPage);
}
return resultBuilder.build();
}
public static void assertOperatorEquals(Operator operator, List<Page> expected)
{
List<Page> actual = toPages(operator);
assertEquals(actual.size(), expected.size());
for (int i = 0; i < actual.size(); i++) {
assertPageEquals(operator.getTypes(), actual.get(i), expected.get(i));
}
}
public static void assertOperatorEquals(Operator operator, List<Page> input, List<Page> expected)
{
List<Page> actual = toPages(operator, input);
assertEquals(actual.size(), expected.size());
for (int i = 0; i < actual.size(); i++) {
assertPageEquals(operator.getTypes(), actual.get(i), expected.get(i));
}
}
public static void assertOperatorEquals(Operator operator, MaterializedResult expected)
{
List<Page> pages = toPages(operator);
MaterializedResult actual = toMaterializedResult(operator.getOperatorContext().getSession(), operator.getTypes(), pages);
assertEquals(actual, expected);
}
public static void assertOperatorEquals(Operator operator, List<Page> input, MaterializedResult expected)
{
List<Page> pages = toPages(operator, input);
MaterializedResult actual = toMaterializedResult(operator.getOperatorContext().getSession(), operator.getTypes(), pages);
assertEquals(actual, expected);
}
public static void assertOperatorEqualsIgnoreOrder(Operator operator, List<Page> input, MaterializedResult expected)
{
List<Page> pages = toPages(operator, input);
MaterializedResult actual = toMaterializedResult(operator.getOperatorContext().getSession(), operator.getTypes(), pages);
assertEquals(actual.getTypes(), expected.getTypes());
assertEqualsIgnoreOrder(actual.getMaterializedRows(), expected.getMaterializedRows());
}
}