public async Task ReadAsync_InvalidParameterTests()
        {
            // Arrange
            BlobClient            blobClient = new BlobClient(new Uri("https://www.doesntmatter.com"));
            LazyLoadingBlobStream lazyStream = new LazyLoadingBlobStream(blobClient, offset: 0, blockSize: Constants.KB);

            // Act
            await TestHelper.AssertExpectedExceptionAsync <ArgumentNullException>(
                lazyStream.ReadAsync(buffer: null, offset: 0, count: 10),
                e => Assert.AreEqual($"buffer cannot be null.{Environment.NewLine}Parameter name: buffer", e.Message));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: -1, count: 10),
                e => Assert.AreEqual(
                    $"Specified argument was out of the range of valid values.{Environment.NewLine}Parameter name: offset cannot be less than 0.",
                    e.Message));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: 11, count: 10),
                e => Assert.AreEqual(
                    $"Specified argument was out of the range of valid values.{Environment.NewLine}Parameter name: offset cannot exceed buffer length.",
                    e.Message));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: 1, count: -1),
                e => Assert.AreEqual(
                    $"Specified argument was out of the range of valid values.{Environment.NewLine}Parameter name: count cannot be less than 0.",
                    e.Message));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: 5, count: 15),
                e => Assert.AreEqual(
                    $"Specified argument was out of the range of valid values.{Environment.NewLine}Parameter name: offset + count cannot exceed buffer length.",
                    e.Message));
        }
Exemple #2
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        public async Task ReadAsync_InvalidParameterTests()
        {
            // Arrange
            BlobClient            blobClient = new BlobClient(new Uri("https://www.doesntmatter.com"));
            LazyLoadingBlobStream lazyStream = new LazyLoadingBlobStream(blobClient, offset: 0, blockSize: Constants.KB);

            // Act
            await TestHelper.AssertExpectedExceptionAsync <ArgumentNullException>(
                lazyStream.ReadAsync(buffer: null, offset: 0, count: 10),
                new ArgumentNullException("buffer", $"buffer cannot be null."));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: -1, count: 10),
                new ArgumentOutOfRangeException("offset", "offset cannot be less than 0."));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: 11, count: 10),
                new ArgumentOutOfRangeException("offset", "offset cannot exceed buffer length."));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: 1, count: -1),
                new ArgumentOutOfRangeException("count", "count cannot be less than 0."));

            await TestHelper.AssertExpectedExceptionAsync <ArgumentOutOfRangeException>(
                lazyStream.ReadAsync(buffer: new byte[10], offset: 5, count: 15),
                new ArgumentOutOfRangeException("offset and count", "offset + count cannot exceed buffer length."));
        }
        public async Task ReadAsync()
        {
            // Arrange
            await using DisposingContainer test = await GetTestContainerAsync();

            // Arrange
            int length = Constants.KB;

            byte[]     exectedData = GetRandomBuffer(length);
            BlobClient blobClient  = InstrumentClient(test.Container.GetBlobClient(GetNewBlobName()));

            using (var stream = new MemoryStream(exectedData))
            {
                await blobClient.UploadAsync(stream);
            }
            LazyLoadingBlobStream lazyStream = new LazyLoadingBlobStream(blobClient, offset: 0, blockSize: 157);

            byte[] actualData = new byte[length];
            int    offset     = 0;

            // Act
            int count = 0;

            while (offset + count < length)
            {
                for (count = 6; count < 37; count += 6)
                {
                    await lazyStream.ReadAsync(actualData, offset, count);

                    offset += count;
                }
            }
            await lazyStream.ReadAsync(actualData, offset, length - offset);

            // Assert
            TestHelper.AssertSequenceEqual(exectedData, actualData);
        }