artifact.setResolved(true);

            if (artifact.isSnapshot()) {
                Matcher matcher = Artifact.VERSION_FILE_PATTERN.matcher(artifact.getVersion());
                if (matcher.matches()) {
                    Snapshot snapshot = new Snapshot();
                    snapshot.setTimestamp(matcher.group(2));
                    try {

                String pluginGroup = pluginGroups.get(i);

                validateStringNotEmpty(problems, "pluginGroups.pluginGroup[" + i + "]", pluginGroup, null);

                if (!ID_REGEX.matcher(pluginGroup).matches()) {
                    addViolation(
                            problems,
                            BuilderProblem.Severity.ERROR,
                            "pluginGroups.pluginGroup[" + i + "]",

        assertSame(mirrorC, mirrorSelector.getMirror(getRepo("c", "http://c.c"), mirrors));
    }

    @Test
    void testMirrorStopOnFirstMatch() {
        // exact matches win first
        Mirror mirrorA2 = newMirror("a2", "a,b", "http://a2");
        Mirror mirrorA = newMirror("a", "a", "http://a");
        // make sure repeated entries are skipped

     * <li>The module path to the child is considered to
     * point at the POM rather than its base directory if the path ends with ".xml" (ignoring case)</li>
     * <li>The name of the child's base directory matches the artifact id of the child.</li>
     * </ul>
     * Note that for the sake of independence from the user
     * environment, the filesystem is intentionally not used for the calculation.</p>
     *