public async Task Collapser_CollapsesTwoBlobs()
        {
            // Arrange
            using (var tc = new TestContext())
            {
                await tc.UploadAsync("a");
                await tc.UploadAsync("a");

                // Act
                await tc.Target.CollapseAsync(tc.CollapseRequest);

                // Assert
                var blobs = await tc.ListBlobsAsync();
                Assert.Contains("2015.01.02.03.04.05", blobs[0].Name);
                Assert.Contains("latest", blobs[1].Name);
                Assert.Equal("a", blobs[0].Content);
                Assert.Equal("a", blobs[1].Content);
                Assert.Equal(2, blobs.Count);
            }
        }
        public async Task Collapser_CollapsesLotsOfBlobs()
        {
            // Arrange
            using (var tc = new TestContext())
            {
                await tc.UploadAsync("a");
                await tc.UploadAsync("a");
                await tc.UploadAsync("b");
                await tc.UploadAsync("b");
                await tc.UploadAsync("b");
                await tc.UploadAsync("a");
                await tc.UploadAsync("c");
                await tc.UploadAsync("c");
                await tc.UploadAsync("d");
                await tc.UploadAsync("d");

                // Act
                await tc.Target.CollapseAsync(tc.CollapseRequest);

                // Assert
                var blobs = await tc.ListBlobsAsync();
                Assert.Contains("2015.01.02.03.04.05", blobs[0].Name);
                Assert.Contains("2015.01.02.03.04.07", blobs[1].Name);
                Assert.Contains("2015.01.02.03.04.10", blobs[2].Name);
                Assert.Contains("2015.01.02.03.04.11", blobs[3].Name);
                Assert.Contains("2015.01.02.03.04.13", blobs[4].Name);
                Assert.Contains("latest", blobs[5].Name);
                Assert.Equal("a", blobs[0].Content);
                Assert.Equal("b", blobs[1].Content);
                Assert.Equal("a", blobs[2].Content);
                Assert.Equal("c", blobs[3].Content);
                Assert.Equal("d", blobs[4].Content);
                Assert.Equal("d", blobs[5].Content);
                Assert.Equal(6, blobs.Count);
            }
        }