<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>mtitek.solr.embed.samples</groupId>
    <artifactId>mtitek-solr-embed-samples</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-test-framework</artifactId>
            <version>8.6.0</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.28</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>

                <configuration>
                    <encoding>UTF-8</encoding>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

mtitek-solr-embed-samples/src/test/java/mtitek/solr/embed/samples/MiniSolrCloudClusterTest.java:

package mtitek.solr.embed.samples;

import java.io.File;
import java.nio.file.Path;

import org.apache.solr.client.solrj.embedded.JettyConfig;
import org.apache.solr.client.solrj.impl.CloudSolrClient;
import org.apache.solr.client.solrj.request.CollectionAdminRequest;
import org.apache.solr.client.solrj.request.ConfigSetAdminRequest;
import org.apache.solr.client.solrj.response.CollectionAdminResponse;
import org.apache.solr.client.solrj.response.ConfigSetAdminResponse;
import org.apache.solr.cloud.MiniSolrCloudCluster;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;

public class MiniSolrCloudClusterTest {
    @Rule
    public TemporaryFolder temporaryFolder = new TemporaryFolder();

    @Test
    public void test() throws Exception {
        final File newFolder = temporaryFolder.newFolder("MiniSolrCloudClusterTest");
        final Path baseDir = newFolder.toPath();

        final int numServers = 1;

        // random unassigned HTTP port
        final int jettyPort = 0;

        final JettyConfig jettyConfig = JettyConfig.builder().setPort(jettyPort).build();

        // create a MiniSolrCloudCluster instance
        final MiniSolrCloudCluster miniSolrCloudCluster = new MiniSolrCloudCluster(numServers, baseDir, jettyConfig);

        // Upload Solr configuration directory to ZooKeeper
        String solrZKConfigDir = "src/test/resources/conf";
        String solrZKConfigName = "MySolrZKConfigName";
        File configDir = new File(solrZKConfigDir);
        miniSolrCloudCluster.uploadConfigSet(configDir.toPath(), solrZKConfigName);

        // get Solr Client
        CloudSolrClient cloudSolrClient = miniSolrCloudCluster.getSolrClient();

        // list ConfigSets
        {
            ConfigSetAdminResponse adminResponse = listConfigSets(cloudSolrClient);
            System.out.println(adminResponse);
        }

        // get cluster status
        {
            CollectionAdminResponse adminResponse = getClusterStatus(cloudSolrClient);
            System.out.println(adminResponse);
        }

        // shutdown MiniSolrCloudCluster
        miniSolrCloudCluster.shutdown();
    }

    private ConfigSetAdminResponse listConfigSets(CloudSolrClient cloudSolrClient) throws Exception {
        final ConfigSetAdminRequest.List adminRequest = new ConfigSetAdminRequest.List();

        ConfigSetAdminResponse adminResponse = adminRequest.process(cloudSolrClient);

        return adminResponse;
    }

    private CollectionAdminResponse getClusterStatus(CloudSolrClient cloudSolrClient) throws Exception {
        final CollectionAdminRequest.ClusterStatus adminRequest = CollectionAdminRequest.ClusterStatus.getClusterStatus();

        CollectionAdminResponse adminResponse = adminRequest.process(cloudSolrClient);

        return adminResponse;
    }
}

Running this JUnit test class should output the following:

{responseHeader={status=0,QTime=30},configSets=[MySolrZKConfigName]}

{responseHeader={status=0,QTime=16},cluster={collections={},live_nodes=[127.0.0.1:51073_solr]}}