maven-surefire-common/src/main/java/org/apache/maven/plugin/surefire/report/ReporterUtils.java

package org.apache.maven.plugin.surefire.report;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.text.NumberFormat;
import java.util.Locale;

/**
 * Utility for reporter classes.
 *
 * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
 * @since 2.19
 */
final class ReporterUtils
{
    private static final int MS_PER_SEC = 1000;

    private ReporterUtils()
    {
        throw new IllegalStateException( "non instantiable constructor" );
    }

    static String formatElapsedTime( double runTime )
    {
        NumberFormat numberFormat = NumberFormat.getInstance( Locale.ENGLISH );
        numberFormat.setGroupingUsed( true );
        numberFormat.setMinimumFractionDigits( 0 );
        numberFormat.setMaximumFractionDigits( 3 );
        return numberFormat.format( runTime / MS_PER_SEC );
    }
}