<modelVersion>4.0.0</modelVersion>

  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-install-plugin</artifactId>
  <version>0.1</version>
  <packaging>maven-plugin</packaging>

  <name>Maven Integration Test Plugin</name>
  <description>
    A test plugin to assist testing of Maven core.
  </description>

  <modelVersion>4.0.0</modelVersion>

  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-resources-plugin</artifactId>
  <version>0.1</version>
  <packaging>maven-plugin</packaging>

  <name>Maven Integration Test Plugin</name>
  <description>
    A test plugin to assist testing of Maven core.
  </description>

        @Nonnull
        private final String artifactId;

        @Nullable
        private final String goalPrefix;

        @Nullable
        private final String name;

        PluginInfo(String groupId, String artifactId, String goalPrefix, String name) {
            this.groupId = groupId;
            this.artifactId = artifactId;
            this.goalPrefix = goalPrefix;
            this.name = name;

    }

    @Test
    void testMissingArtifactId() throws Exception {
        SimpleProblemCollector result = validate("missing-artifactId-pom.xml");

        assertViolations(result, 0, 1, 0);

        assertEquals("'artifactId' is missing.", result.getErrors().get(0));
    }

    @Test
    void testMissingGroupId() throws Exception {

    }

    public static String versionlessKey(String groupId, String artifactId) {
        notBlank(groupId, "groupId can neither be null, empty nor blank");
        notBlank(artifactId, "artifactId can neither be null, empty nor blank");

        return groupId + ":" + artifactId;
    }

    public static String key(Artifact artifact) {

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t06-d</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t06-d</artifactId>
  <packaging>jar</packaging>
  <version>1.1</version>

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t07-d</artifactId>
  <packaging>jar</packaging>
  <version>1.1</version>

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t10-b</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>

  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>inheritance</groupId>
  <artifactId>parent</artifactId>
  <version>11-SNAPSHOT</version>

  <name>Model inheritance test</name>
  <description>Model inheritance description</description>
  <url>http://www.apache.org/</url>

  <mailingLists>