content: /*
   * 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.testing;
  
  import static org.apache.beam.sdk.testing.FileChecksumMatcher.fileContentsHaveChecksum;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.containsString;
  import static org.junit.Assume.assumeFalse;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import java.util.regex.Pattern;
  import org.apache.beam.sdk.util.NumberedShardedFile;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.io.Files;
  import org.apache.commons.lang3.SystemUtils;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  import org.junit.rules.TemporaryFolder;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link FileChecksumMatcher}. */
  @RunWith(JUnit4.class)
  public class FileChecksumMatcherTest {
    @Rule public TemporaryFolder tmpFolder = new TemporaryFolder();
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    @Test
    public void testPreconditionChecksumIsNull() throws IOException {
      thrown.expect(IllegalArgumentException.class);
      thrown.expectMessage(containsString("Expected valid checksum, but received"));
      fileContentsHaveChecksum(null);
    }
  
    @Test
    public void testPreconditionChecksumIsEmpty() throws IOException {
      thrown.expect(IllegalArgumentException.class);
      thrown.expectMessage(containsString("Expected valid checksum, but received"));
      fileContentsHaveChecksum("");
    }
  
    @Test
    public void testMatcherThatVerifiesSingleFile() throws IOException {
      File tmpFile = tmpFolder.newFile("result-000-of-001");
      Files.asCharSink(tmpFile, StandardCharsets.UTF_8).write("Test for file checksum verifier.");
  
      assertThat(
          new NumberedShardedFile(tmpFile.getPath()),
          fileContentsHaveChecksum("a8772322f5d7b851777f820fc79d050f9d302915"));
    }
  
    @Test
    public void testMatcherThatVerifiesMultipleFiles() throws IOException {
      // TODO: Java core test failing on windows, https://github.com/apache/beam/issues/20468
      assumeFalse(SystemUtils.IS_OS_WINDOWS);
      File tmpFile1 = tmpFolder.newFile("result-000-of-002");
      File tmpFile2 = tmpFolder.newFile("result-001-of-002");
      File tmpFile3 = tmpFolder.newFile("tmp");
      Files.asCharSink(tmpFile1, StandardCharsets.UTF_8).write("To be or not to be, ");
      Files.asCharSink(tmpFile2, StandardCharsets.UTF_8).write("it is not a question.");
      Files.asCharSink(tmpFile3, StandardCharsets.UTF_8).write("tmp");
  
      assertThat(
          new NumberedShardedFile(tmpFolder.getRoot().toPath().resolve("result-*").toString()),
          fileContentsHaveChecksum("90552392c28396935fe4f123bd0b5c2d0f6260c8"));
    }
  
    @Test
    public void testMatcherThatVerifiesFileWithEmptyContent() throws IOException {
      // TODO: Java core test failing on windows, https://github.com/apache/beam/issues/20483
      assumeFalse(SystemUtils.IS_OS_WINDOWS);
      File emptyFile = tmpFolder.newFile("result-000-of-001");
      Files.asCharSink(emptyFile, StandardCharsets.UTF_8).write("");
  
      assertThat(
          new NumberedShardedFile(tmpFolder.getRoot().toPath().resolve("*").toString()),
          fileContentsHaveChecksum("da39a3ee5e6b4b0d3255bfef95601890afd80709"));
    }
  
    @Test
    public void testMatcherThatUsesCustomizedTemplate() throws Exception {
      // Customized template: resultSSS-totalNNN
      // TODO: Java core test failing on windows, https://github.com/apache/beam/issues/20462
      assumeFalse(SystemUtils.IS_OS_WINDOWS);
      File tmpFile1 = tmpFolder.newFile("result0-total2");
      File tmpFile2 = tmpFolder.newFile("result1-total2");
      Files.asCharSink(tmpFile1, StandardCharsets.UTF_8).write("To be or not to be, ");
      Files.asCharSink(tmpFile2, StandardCharsets.UTF_8).write("it is not a question.");
  
      Pattern customizedTemplate =
          Pattern.compile("(?x) result (?<shardnum>\\d+) - total (?<numshards>\\d+)");
  
      assertThat(
          new NumberedShardedFile(
              tmpFolder.getRoot().toPath().resolve("*").toString(), customizedTemplate),
          fileContentsHaveChecksum("90552392c28396935fe4f123bd0b5c2d0f6260c8"));
    }
  }
  