public void CopyObjectModifiedSincePositiveTest()
{
var targetObjectKey = OssTestUtils.GetObjectKey(_className);
var coRequest = new CopyObjectRequest(_bucketName, _sourceObjectKey, _bucketName, targetObjectKey);
coRequest.ModifiedSinceConstraint = DateTime.Now.AddDays(-1);
_ossClient.CopyObject(coRequest);
Assert.IsTrue(OssTestUtils.ObjectExists(_ossClient, _bucketName, targetObjectKey));
_ossClient.DeleteObject(_bucketName, targetObjectKey);
}