public function testCreateNewMetric()
{
$diObj = new DI();
$expectedMetric = new Metric();
$expectedMetric->setName('MemoryUsage');
$expectedMetric->setUnit('Percent');
$expectedMetric->setValue('56');
$expectedMetric->setNamespace('CustomMetric/Test');
/* @var CommandRunner $fakeCmdRunner */
$fakeCmdRunner = Stub::make('\\AWSCustomMetric\\CommandRunner', ['execute' => function () {
}, 'getReturnCode' => 0, 'getReturnValue' => '56']);
$diObj->setCommandRunner($fakeCmdRunner);
$memUsage = new MemoryUsage($diObj, 'CustomMetric/Test');
$this->assertEquals($expectedMetric, $memUsage->createNewMetric('MemoryUsage', 'Percent', '56'), 'MemoryUsage::createNewMetric test failed!');
}