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   * Licensed to the Apache Software Foundation (ASF) under one
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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
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   *
   * Unless required by applicable law or agreed to in writing, software
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   * See the License for the specific language governing permissions and
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  package org.apache.beam.runners.prism;
  
  import static com.google.common.truth.Truth.assertThat;
  import static org.apache.beam.runners.prism.PrismLocator.prismBinDirectory;
  import static org.apache.beam.runners.prism.PrismRunnerTest.getLocalPrismBuildOrIgnoreTest;
  import static org.junit.Assert.assertThrows;
  
  import java.io.IOException;
  import java.nio.file.FileVisitResult;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.nio.file.SimpleFileVisitor;
  import java.nio.file.attribute.BasicFileAttributes;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.beam.sdk.util.ReleaseInfo;
  import org.junit.Before;
  import org.junit.Ignore;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link PrismLocator}. */
  @RunWith(JUnit4.class)
  public class PrismLocatorTest {
  
    private static final ReleaseInfo RELEASE_INFO = ReleaseInfo.getReleaseInfo();
    private static final Path DESTINATION_DIRECTORY = prismBinDirectory();
  
    @Before
    public void setup() throws IOException {
      if (Files.exists(DESTINATION_DIRECTORY)) {
        Files.walkFileTree(
            DESTINATION_DIRECTORY,
            new SimpleFileVisitor<Path>() {
              @Override
              public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
                  throws IOException {
                Files.delete(file);
                return FileVisitResult.CONTINUE;
              }
            });
  
        Files.delete(DESTINATION_DIRECTORY);
      }
    }
  
    @Test
    public void givenVersionOverride_thenResolvesLocation() throws IOException {
      PrismPipelineOptions options = options();
      options.setPrismVersionOverride("2.57.0-RC1");
  
      PrismLocator underTest = new PrismLocator(options);
      String got = underTest.resolveSource();
  
      assertThat(got)
          .contains(
              "https://github.com/apache/beam/releases/download/v" + RELEASE_INFO.getSdkVersion());
      assertThat(got).contains("apache_beam-v2.57.0-RC1-prism");
      assertThat(got).contains(".zip");
    }
  
    // This testcase validates a user override to download a different release version specifically.
    @Test
    public void givenHttpPrismLocationOption_thenResolvesLocation() throws IOException {
      PrismPipelineOptions options = options();
      String want =
          "https://github.com/apache/beam/releases/download/v2.57.0/apache_beam-v2.57.0-prism-darwin-arm64.zip";
      options.setPrismLocation(want);
  
      PrismLocator underTest = new PrismLocator(options);
      String got = underTest.resolveSource();
  
      assertThat(got).isEqualTo(want);
    }
  
    // This testcase is the Release Validation behavior, where we provide an RC option, but
    // need to resolve the download for the non-RC version.
    // Copy the URL directly, and set the location, override the file's RC version with the final
    // version.
    @Test
    public void givenRCGithubTagPrismLocationOption_thenResolvesLocation() {
      PrismPipelineOptions options = options();
      options.setPrismLocation("https://github.com/apache/beam/releases/tag/v2.57.0-RC1/");
      options.setPrismVersionOverride("2.57.0");
  
      PrismLocator underTest = new PrismLocator(options);
      String got = underTest.resolveSource();
  
      assertThat(got)
          .contains(
              "https://github.com/apache/beam/releases/download/v2.57.0-RC1/apache_beam-v2.57.0-prism");
      assertThat(got).contains(".zip");
    }
  
    @Test
    public void givenRCGithubTagPrismLocationOptionNoTrailingSlash_thenResolvesLocation() {
      PrismPipelineOptions options = options();
      options.setPrismLocation("https://github.com/apache/beam/releases/tag/v2.57.0-RC2");
      options.setPrismVersionOverride("2.57.0");
  
      PrismLocator underTest = new PrismLocator(options);
      String got = underTest.resolveSource();
  
      assertThat(got)
          .contains(
              "https://github.com/apache/beam/releases/download/v2.57.0-RC2/apache_beam-v2.57.0-prism");
      assertThat(got).contains(".zip");
    }
  
    @Test
    public void givenFilePrismLocationOption_thenResolves() throws IOException {
      assertThat(Files.exists(DESTINATION_DIRECTORY)).isFalse();
      PrismPipelineOptions options = options();
      options.setPrismLocation(getLocalPrismBuildOrIgnoreTest());
  
      PrismLocator underTest = new PrismLocator(options);
      String got = underTest.resolve();
  
      // Local file overrides should use the local binary in place, not copy
      // to the cache. Doing so prevents using a locally built version.
      assertThat(got).doesNotContain(DESTINATION_DIRECTORY.toString());
      assertThat(got).contains(options.getPrismLocation());
      Path gotPath = Paths.get(got);
      assertThat(Files.exists(gotPath)).isTrue();
    }
  
    @Test
    public void givenIncorrectGithubPrismLocationOption_thenThrows() {
      PrismPipelineOptions options = options();
      // This is an incorrect github download path. Downloads are under /download/ not tag.
      options.setPrismLocation(
          "https://github.com/apache/beam/releases/tag/v2.57.0/apache_beam-v2.57.0-prism-darwin-amd64.zip");
  
      PrismLocator underTest = new PrismLocator(options);
  
      RuntimeException error = assertThrows(RuntimeException.class, underTest::resolve);
      // Message should contain the incorrectly constructed download link.
      assertThat(error.getMessage()).contains(".zip/apache_beam");
    }
  
    @Test
    @Ignore // TODO: use mock site. Currently failing with response code 500 instead of 404
    public void givenPrismLocation404_thenThrows() {
      PrismPipelineOptions options = options();
      options.setPrismLocation("https://example.com/i/dont/exist.zip");
  
      PrismLocator underTest = new PrismLocator(options);
      RuntimeException error = assertThrows(RuntimeException.class, underTest::resolve);
      assertThat(error.getMessage()).contains("NotFoundException");
    }
  
    private static PrismPipelineOptions options() {
      return PipelineOptionsFactory.create().as(PrismPipelineOptions.class);
    }
  }
  