this.url = Objects.requireNonNull(url, "url cannot be null");
        this.hashCode = Objects.hashCode(url);
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return url.openStream();
    }

    @Override
    public String getLocation() {
        return url.toString();
    }

    /**
     * Gets the URL of this source.
     *

  <ciManagement>
    <system>none</system>
    <url>https://ci.apache.org/spacy%20path</url>
  </ciManagement>
  <distributionManagement>
    <repository>
      <id>dist</id>
      <url>scm:svn:svn+ssh://dist.apache.org/spacy%20path</url>
    </repository>
    <snapshotRepository>
      <id>snap</id>
      <url>scm:svn:svn+ssh://snap.apache.org/spacy%20path</url>
    </snapshotRepository>
    <site>
      <id>site</id>

            String id, String url, String layoutId, boolean uniqueVersion) throws UnknownRepositoryLayoutException {
        return injectSession(factory.createDeploymentArtifactRepository(id, url, layoutId, uniqueVersion), false);
    }

    public ArtifactRepository createDeploymentArtifactRepository(
            String id, String url, ArtifactRepositoryLayout repositoryLayout, boolean uniqueVersion) {

      <url>dav:https://dav.codehaus.org/snapshots.repository/plexus</url>
    </snapshotRepository>
    <site>
      <id>codehaus.org</id>
      <url>dav:https://dav.codehaus.org/plexus</url>
    </site>
  </distributionManagement>
  <repositories>
    <repository>
      <id>codehaus.snapshots</id>
      <name>Codehaus Snapshot Development Repository</name>
      <url>http://snapshots.repository.codehaus.org</url>
      <releases>

        NullPointerException e = assertThrows(
                NullPointerException.class, () -> new UrlSource(null), "Should fail, since you must specify a url");
        assertEquals("url cannot be null", e.getMessage());
    }

    @Test
    void testGetInputStream() throws Exception {
        URL txtFile = new File("target/test-classes/source.txt").toURI().toURL();
        UrlSource source = new UrlSource(txtFile);

            throws UnknownRepositoryLayoutException;

    ArtifactRepository createDeploymentArtifactRepository(
            String id, String url, ArtifactRepositoryLayout layout, boolean uniqueVersion);

    ArtifactRepository createArtifactRepository(
            String id,
            String url,
            String layoutId,

  </parent>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven</groupId>
  <artifactId>p1</artifactId>
  <packaging>pom</packaging>
  <name>p1</name>
  <version>1.0</version>
  <scm>
    <url>scm-url</url>
  </scm>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>maven-test-b</artifactId>
        <version>1.0</version>
      </dependency>

  </parent>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-t06</groupId>
  <artifactId>p1</artifactId>
  <packaging>pom</packaging>
  <name>p1</name>
  <version>1.0</version>
  <scm>
    <url>scm-url</url>
  </scm>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t06-b</artifactId>
        <version>1.0</version>
      </dependency>

  <artifactId>t04-a</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <repositories>
    <repository>
      <id>central</id>
      <name>Fake Maven Central Repository</name>
      <url>file://dummy</url>
    </repository>
  </repositories>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t04-b</artifactId>
      <version>2.0</version>
    </dependency>

  <artifactId>t09-a</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <repositories>
    <repository>
      <id>central</id>
      <name>Fake Maven Central Repository</name>
      <url>file://dummy</url>
    </repository>
  </repositories>

  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t09-b</artifactId>
      <version>1.0</version>
      <scope>compile</scope>