public function testMultiTenant()
{
$snippet = $this->snippetFromClass(DatastoreClient::class, 2);
$res = $snippet->invoke('datastore');
$this->assertInstanceOf(DatastoreClient::class, $res->returnVal());
$ds = $res->returnVal();
$ref = new \ReflectionClass($ds);
$opProp = $ref->getProperty('operation');
$opProp->setAccessible(true);
$op = $opProp->getValue($ds);
$opRef = new \ReflectionClass($op);
$nsProp = $opRef->getProperty('namespaceId');
$nsProp->setAccessible(true);
$this->assertEquals('my-application-namespace', $nsProp->getValue($op));
}