private setup() {
        docsRoot = new File(projectDir, "docsRoot")
        new File(docsRoot, 'javadoc').mkdirs()
        sampleDoc = new File(docsRoot, "sample.adoc")

        new File(projectDir,"build/working/samples/docs").mkdirs()
        sampleSampleDoc = new File(projectDir, "build/working/samples/docs/sample_sample.adoc")

        new File(projectDir,"build/working/release-notes").mkdirs()

        Set<String> scopesToCollect = new TreeSet<>();
        Set<String> scopesToResolve = new TreeSet<>();

        collectDependencyRequirements(scopesToResolve, scopesToCollect, mojoExecutions);

        return new DependencyContext(session.getCurrentProject(), scopesToCollect, scopesToResolve);
    }

            return;
        }

        MetadataGraphVertex vertex = new MetadataGraphVertex(node.md, versionedVertices, scopedVertices);
        vertices.add(vertex);

        if (parentVertex != null) // then create the edge
        {
            ArtifactMetadata md = node.getMd();
            MetadataGraphEdge e =
                    new MetadataGraphEdge(md.version, md.resolved, md.artifactScope, md.artifactUri, depth, pomOrder);

            throw new PlexusConfigurationException(e.getMessage(), e);
        }
    }

    private static BufferedInputStream reset(StreamSupplier inputSupplier, BufferedInputStream bis) throws IOException {
        try {
            bis.reset();
            return bis;
        } catch (IOException e) {
            return new BufferedInputStream(inputSupplier.open(), BUFFER_SIZE);
        }

        DefaultRepositoryLayout layout = new DefaultRepositoryLayout();
        ArtifactRepositoryPolicy blah = new ArtifactRepositoryPolicy(
                true, ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS, ArtifactRepositoryPolicy.CHECKSUM_POLICY_IGNORE);
        return new MavenArtifactRepository(

```java
Request washingtonPostRequest = new Request.Builder()
    .url("https://www.washingtonpost.com/")
    .build();
client.newCall(washingtonPostRequest).enqueue(new Callback() {
  ...
});

Request newYorkTimesRequest = new Request.Builder()
    .url("https://www.nytimes.com/")
    .build();
client.newCall(newYorkTimesRequest).enqueue(new Callback() {
  ...
});
```

 */
class ScmTest {

    @Test
    void testHashCodeNullSafe() {
        new Scm().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Scm().equals(null));

        new Scm().equals(new Scm());
    }

    @Test
    void testEqualsIdentity() {
        Scm thing = new Scm();
        assertTrue(thing.equals(thing), "Expected " + thing + " to equal " + thing);
    }

        throw new UnsupportedOperationException("Cannot change the version information for an attached artifact."
                + " It is derived from the main artifact.");
    }

    @Override
    public String getBaseVersion() {
        return parent.getBaseVersion();
    }

    @Override
    public void setBaseVersion(String baseVersion) {

  // instance for every unit test.
  MockWebServer server = new MockWebServer();

  // Schedule some responses.
  server.enqueue(new MockResponse.Builder()
      .body("hello, world!")
      .build());
  server.enqueue(new MockResponse.Builder()
      .body("sup, bra?")
      .build());
  server.enqueue(new MockResponse.Builder()
      .body("yo dog")
      .build());

        MavenExecutionRequest mavenExecutionRequest = new DefaultMavenExecutionRequest();
        mavenExecutionRequest.setExecutionListener(new AbstractExecutionListener());
        mavenExecutionRequest.setGoals(Arrays.asList("clean"));
        final MavenSession session = new MavenSession(
                null,
                new DefaultRepositorySystemSession(h -> false),