| /* |
| * 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.io; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.Writer; |
| import org.apache.beam.sdk.options.PipelineOptionsFactory; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Charsets; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.io.Files; |
| import org.junit.Assert; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TemporaryFolder; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** Tests for {@link org.apache.beam.sdk.io.TextRowCountEstimator}. */ |
| @RunWith(JUnit4.class) |
| public class TextRowCountEstimatorTest { |
| @Rule public TemporaryFolder temporaryFolder = new TemporaryFolder(); |
| private static final Logger LOG = LoggerFactory.getLogger(TextRowCountEstimatorTest.class); |
| |
| @Test |
| public void testNonEmptyFiles() throws Exception { |
| File file1 = temporaryFolder.newFile("file1.txt"); |
| Writer writer = Files.newWriter(file1, Charsets.UTF_8); |
| for (int i = 0; i < 100; i++) { |
| writer.write("123123123\n"); |
| } |
| writer.flush(); |
| writer.close(); |
| temporaryFolder.newFolder("testfolder"); |
| temporaryFolder.newFolder("testfolder2"); |
| file1 = temporaryFolder.newFile("testfolder/test2.txt"); |
| writer = Files.newWriter(file1, Charsets.UTF_8); |
| for (int i = 0; i < 50; i++) { |
| writer.write("123123123\n"); |
| } |
| |
| writer.flush(); |
| writer.close(); |
| TextRowCountEstimator textRowCountEstimator = |
| TextRowCountEstimator.builder().setFilePattern(temporaryFolder.getRoot() + "/**").build(); |
| Double rows = textRowCountEstimator.estimateRowCount(PipelineOptionsFactory.create()); |
| Assert.assertNotNull(rows); |
| Assert.assertEquals(150d, rows, 0.01); |
| } |
| |
| @Test(expected = FileNotFoundException.class) |
| public void testEmptyFolder() throws Exception { |
| TextRowCountEstimator textRowCountEstimator = |
| TextRowCountEstimator.builder().setFilePattern(temporaryFolder.getRoot() + "/**").build(); |
| Double rows = textRowCountEstimator.estimateRowCount(PipelineOptionsFactory.create()); |
| } |
| |
| @Test |
| public void testEmptyFile() throws Exception { |
| File file1 = temporaryFolder.newFile("file1.txt"); |
| Writer writer = Files.newWriter(file1, Charsets.UTF_8); |
| for (int i = 0; i < 100; i++) { |
| writer.write("\n"); |
| } |
| writer.flush(); |
| writer.close(); |
| TextRowCountEstimator textRowCountEstimator = |
| TextRowCountEstimator.builder().setFilePattern(temporaryFolder.getRoot() + "/**").build(); |
| Double rows = textRowCountEstimator.estimateRowCount(PipelineOptionsFactory.create()); |
| Assert.assertEquals(0d, rows, 0.01); |
| } |
| |
| @Test(expected = TextRowCountEstimator.NoEstimationException.class) |
| public void lotsOfNewLines() throws Exception { |
| File file1 = temporaryFolder.newFile("file1.txt"); |
| Writer writer = Files.newWriter(file1, Charsets.UTF_8); |
| for (int i = 0; i < 1000; i++) { |
| writer.write("\n"); |
| } |
| writer.write("123123123"); |
| writer.flush(); |
| writer.close(); |
| TextRowCountEstimator textRowCountEstimator = |
| TextRowCountEstimator.builder() |
| .setNumSampledBytesPerFile(10L) |
| .setFilePattern(temporaryFolder.getRoot() + "/**") |
| .build(); |
| textRowCountEstimator.estimateRowCount(PipelineOptionsFactory.create()); |
| } |
| |
| @Test(expected = FileNotFoundException.class) |
| public void testNonExistence() throws Exception { |
| TextRowCountEstimator textRowCountEstimator = |
| TextRowCountEstimator.builder() |
| .setFilePattern(temporaryFolder.getRoot() + "/something/**") |
| .build(); |
| Double rows = textRowCountEstimator.estimateRowCount(PipelineOptionsFactory.create()); |
| Assert.assertNull(rows); |
| } |
| } |