| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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. |
| */ |
| package org.apache.beam.sdk.values; |
| |
| import static org.apache.beam.sdk.TestUtils.LINES; |
| |
| import java.io.File; |
| import org.apache.beam.sdk.io.TextIO; |
| import org.apache.beam.sdk.testing.NeedsRunner; |
| import org.apache.beam.sdk.testing.TestPipeline; |
| import org.apache.beam.sdk.testing.ValidatesRunner; |
| import org.apache.beam.sdk.transforms.Create; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.junit.Ignore; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.junit.rules.TemporaryFolder; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for PDone. */ |
| @RunWith(JUnit4.class) |
| public class PDoneTest { |
| |
| @Rule public final TestPipeline p = TestPipeline.create(); |
| |
| @Rule public TemporaryFolder tmpFolder = new TemporaryFolder(); |
| |
| /** A PTransform that just returns a fresh PDone. */ |
| static class EmptyTransform extends PTransform<PBegin, PDone> { |
| @Override |
| public PDone expand(PBegin begin) { |
| return PDone.in(begin.getPipeline()); |
| } |
| } |
| |
| /** A PTransform that's composed of something that returns a PDone. */ |
| static class SimpleTransform extends PTransform<PBegin, PDone> { |
| private final String filename; |
| |
| public SimpleTransform(String filename) { |
| this.filename = filename; |
| } |
| |
| @Override |
| public PDone expand(PBegin begin) { |
| return begin.apply(Create.of(LINES)).apply(TextIO.write().to(filename)); |
| } |
| } |
| |
| // TODO: This test doesn't work, because we can't handle composite |
| // transforms that contain no nested transforms. |
| @Ignore |
| @Test |
| @Category(ValidatesRunner.class) |
| public void testEmptyTransform() { |
| p.begin().apply(new EmptyTransform()); |
| |
| p.run(); |
| } |
| |
| // Cannot run on the service, unless we allocate a GCS temp file |
| // instead of a local temp file. Or switch to applying a different |
| // transform that returns PDone. |
| @Test |
| @Category(NeedsRunner.class) |
| public void testSimpleTransform() throws Exception { |
| File tmpFile = tmpFolder.newFile("file.txt"); |
| String filename = tmpFile.getPath(); |
| |
| p.begin().apply(new SimpleTransform(filename)); |
| |
| p.run(); |
| } |
| } |