src/TestUtils/PHPUnit4To6Shim.php

<?php
/*
 * Copyright 2018 Google Inc. All Rights Reserved.
 *
 * Licensed 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.
 */

namespace Google\Cloud\TestUtils;

class PHPUnit4To6Shim
{
    public static function install()
    {
        if (!class_exists('\PHPUnit\Framework\TestCase', true)) {
            class_alias(
                '\PHPUnit_Framework_TestCase',
                '\PHPUnit\Framework\TestCase'
            );
        } elseif (!class_exists('\PHPUnit_Framework_TestCase', true)) {
            class_alias(
                '\PHPUnit\Framework\TestCase',
                '\PHPUnit_Framework_TestCase'
            );
        }
    }
}