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));
}
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);
}