public async Task CloudPageBlobCopyTestWithMetadataOverrideAsync()
        {
            CloudBlobContainer container = GetRandomContainerReference();

            try
            {
                await container.CreateAsync();

                CloudPageBlob source = container.GetPageBlobReference("source");

                string data = new string('a', 512);
                await UploadTextAsync(source, data, Encoding.UTF8);

                source.Metadata["Test"] = "value";
                await source.SetMetadataAsync();

                CloudPageBlob copy = container.GetPageBlobReference("copy");
                copy.Metadata["Test2"] = "value2";
                string copyId = await copy.StartCopyAsync(TestHelper.Defiddler(source));
                await WaitForCopyAsync(copy);

                Assert.AreEqual(CopyStatus.Success, copy.CopyState.Status);
                Assert.AreEqual(source.Uri.AbsolutePath, copy.CopyState.Source.AbsolutePath);
                Assert.AreEqual(data.Length, copy.CopyState.TotalBytes);
                Assert.AreEqual(data.Length, copy.CopyState.BytesCopied);
                Assert.AreEqual(copyId, copy.CopyState.CopyId);
                Assert.IsTrue(copy.CopyState.CompletionTime > DateTimeOffset.UtcNow.Subtract(TimeSpan.FromMinutes(1)));

                string copyData = await DownloadTextAsync(copy, Encoding.UTF8);

                Assert.AreEqual(data, copyData, "Data inside copy of blob not similar");

                await copy.FetchAttributesAsync();

                await source.FetchAttributesAsync();

                BlobProperties prop1 = copy.Properties;
                BlobProperties prop2 = source.Properties;

                Assert.AreEqual(prop1.CacheControl, prop2.CacheControl);
                Assert.AreEqual(prop1.ContentDisposition, prop2.ContentDisposition);
                Assert.AreEqual(prop1.ContentEncoding, prop2.ContentEncoding);
                Assert.AreEqual(prop1.ContentLanguage, prop2.ContentLanguage);
                Assert.AreEqual(prop1.ContentMD5, prop2.ContentMD5);
                Assert.AreEqual(prop1.ContentType, prop2.ContentType);

                Assert.AreEqual("value2", copy.Metadata["Test2"], false, "Copied metadata not same");
                Assert.IsFalse(copy.Metadata.ContainsKey("Test"), "Source Metadata should not appear in destination blob");

                await copy.DeleteAsync();
            }
            finally
            {
                await container.DeleteAsync();
            }
        }
        public async Task CloudPageBlobCopyFromSnapshotTestAsync()
        {
            CloudBlobContainer container = GetRandomContainerReference();

            try
            {
                await container.CreateAsync();

                CloudPageBlob source = container.GetPageBlobReference("source");

                string data = new string('a', 512);
                await UploadTextAsync(source, data, Encoding.UTF8);

                source.Metadata["Test"] = "value";
                await source.SetMetadataAsync();

                CloudPageBlob snapshot = await source.CreateSnapshotAsync();

                //Modify source
                string newData = new string('b', 512);
                source.Metadata["Test"] = "newvalue";
                await source.SetMetadataAsync();

                source.Properties.ContentMD5 = null;
                await UploadTextAsync(source, newData, Encoding.UTF8);

                Assert.AreEqual(newData, await DownloadTextAsync(source, Encoding.UTF8), "Source is modified correctly");
                Assert.AreEqual(data, await DownloadTextAsync(snapshot, Encoding.UTF8), "Modifying source blob should not modify snapshot");

                await source.FetchAttributesAsync();

                await snapshot.FetchAttributesAsync();

                Assert.AreNotEqual(source.Metadata["Test"], snapshot.Metadata["Test"], "Source and snapshot metadata should be independent");

                CloudPageBlob copy = container.GetPageBlobReference("copy");
                await copy.StartCopyAsync(TestHelper.Defiddler(snapshot));
                await WaitForCopyAsync(copy);

                Assert.AreEqual(CopyStatus.Success, copy.CopyState.Status);
                Assert.AreEqual(data, await DownloadTextAsync(copy, Encoding.UTF8), "Data inside copy of blob not similar");

                await copy.FetchAttributesAsync();

                BlobProperties prop1 = copy.Properties;
                BlobProperties prop2 = snapshot.Properties;

                Assert.AreEqual(prop1.CacheControl, prop2.CacheControl);
                Assert.AreEqual(prop1.ContentDisposition, prop2.ContentDisposition);
                Assert.AreEqual(prop1.ContentEncoding, prop2.ContentEncoding);
                Assert.AreEqual(prop1.ContentLanguage, prop2.ContentLanguage);
                Assert.AreEqual(prop1.ContentMD5, prop2.ContentMD5);
                Assert.AreEqual(prop1.ContentType, prop2.ContentType);

                Assert.AreEqual("value", copy.Metadata["Test"], false, "Copied metadata not same");

                await copy.DeleteAsync();
            }
            finally
            {
                await container.DeleteAsync();
            }
        }
        public async Task CloudPageBlobCopyTestAsync()
        {
            CloudBlobContainer container = GetRandomContainerReference();

            try
            {
                await container.CreateAsync();

                CloudPageBlob source = container.GetPageBlobReference("source");

                string data = new string('a', 512);
                await UploadTextAsync(source, data, Encoding.UTF8);

                source.Metadata["Test"] = "value";
                await source.SetMetadataAsync();

                CloudPageBlob copy   = container.GetPageBlobReference("copy");
                string        copyId = await copy.StartCopyAsync(TestHelper.Defiddler(source));

                Assert.AreEqual(BlobType.PageBlob, copy.BlobType);
                await WaitForCopyAsync(copy);

                Assert.AreEqual(CopyStatus.Success, copy.CopyState.Status);
                Assert.AreEqual(source.Uri.AbsolutePath, copy.CopyState.Source.AbsolutePath);
                Assert.AreEqual(data.Length, copy.CopyState.TotalBytes);
                Assert.AreEqual(data.Length, copy.CopyState.BytesCopied);
                Assert.AreEqual(copyId, copy.CopyState.CopyId);
                Assert.IsTrue(copy.CopyState.CompletionTime > DateTimeOffset.UtcNow.Subtract(TimeSpan.FromMinutes(1)));

                OperationContext opContext = new OperationContext();
                await TestHelper.ExpectedExceptionAsync(
                    async() => await copy.AbortCopyAsync(copyId, null, null, opContext),
                    opContext,
                    "Aborting a copy operation after completion should fail",
                    HttpStatusCode.Conflict,
                    "NoPendingCopyOperation");

                await source.FetchAttributesAsync();

                Assert.IsNotNull(copy.Properties.ETag);
                Assert.AreNotEqual(source.Properties.ETag, copy.Properties.ETag);
                Assert.IsTrue(copy.Properties.LastModified > DateTimeOffset.UtcNow.Subtract(TimeSpan.FromMinutes(1)));

                string copyData = await DownloadTextAsync(copy, Encoding.UTF8);

                Assert.AreEqual(data, copyData, "Data inside copy of blob not similar");

                await copy.FetchAttributesAsync();

                BlobProperties prop1 = copy.Properties;
                BlobProperties prop2 = source.Properties;

                Assert.AreEqual(prop1.CacheControl, prop2.CacheControl);
                Assert.AreEqual(prop1.ContentDisposition, prop2.ContentDisposition);
                Assert.AreEqual(prop1.ContentEncoding, prop2.ContentEncoding);
                Assert.AreEqual(prop1.ContentLanguage, prop2.ContentLanguage);
                Assert.AreEqual(prop1.ContentMD5, prop2.ContentMD5);
                Assert.AreEqual(prop1.ContentType, prop2.ContentType);

                Assert.AreEqual("value", copy.Metadata["Test"], false, "Copied metadata not same");

                await copy.DeleteAsync();
            }
            finally
            {
                await container.DeleteAsync();
            }
        }