dataProvider outside test class

gistfile1.php

<?php
/**
 * Provider Test Case
 *
 */

class ProviderTest extends PHPUnit_Framework_TestCase {

/**
 *
 * @dataProvider ProviderCollection::provider
 */
	public function testClassProvider($arg) {
		$this->assertEquals(true, $arg);
	}

}

class ProviderCollection {

/**
 * dataProvider for ProviderTest::testClassProvider()
 *
 */
	public function provider() {
		return array(
			array(1),
			array(true)
		);
	}
}