/**
* Test setting extensions.
*/
public function testSetExtensions()
{
$trackPoint = new TrackPoint(null, null, new DateTime());
$em1 = $this->getExtensionMock('e1');
$em2 = $this->getExtensionMock('e2');
$em3 = $this->getExtensionMock('e3');
$extensions = array($em1, $em2, $em3);
$trackPoint->setExtensions($extensions);
$this->assertEquals($extensions, array_values($trackPoint->getExtensions()));
$this->assertCount(3, $trackPoint->getExtensions());
$this->assertSame($em1, $trackPoint->getExtension('e1'));
$this->assertSame($em2, $trackPoint->getExtension('e2'));
$this->assertSame($em3, $trackPoint->getExtension('e3'));
}