public async Task Test_FdbBlob_Can_AppendToBlob()
{
using (var db = await OpenTestPartitionAsync())
{
var location = db.Root["BlobsFromOuterSpace"];
await CleanLocation(db, location);
var blob = new FdbBlob(location);
Log("Insert blob in 3 chunks...");
await blob.WriteAsync(db, async (tr, state) =>
{
await state.AppendAsync(tr, Value("Attack"));
await state.AppendAsync(tr, Value(" of the "));
await state.AppendAsync(tr, Value("Blobs!"));
}, this.Cancellation);
#if DEBUG
await DumpSubspace(db, location);
#endif
Log("Checking blob size...");
long?size = await blob.ReadAsync(db, (tr, state) => state.GetSizeAsync(tr), this.Cancellation);
Log($"> {size:N0}");
Assert.That(size, Is.EqualTo(20));
Log("Checking blob content...");
var data = await blob.ReadAsync(db, (tr, state) => state.ReadAsync(tr, 0, (int)(size ?? 0)), this.Cancellation);
Log($"> {data.Count:N0} bytes");
Assert.That(data.ToUnicode(), Is.EqualTo("Attack of the Blobs!"));
}
}
public async Task Test_FdbBlob_CanAppendLargeChunks()
{
using (var db = await OpenTestPartitionAsync())
{
var location = db.Root["BlobsFromOuterSpace"];
await CleanLocation(db, location);
var blob = new FdbBlob(location.ByKey("BigBlob"));
var data = Slice.Zero(100_000);
for (int i = 0; i < data.Count; i++)
{
data.Array[data.Offset + i] = (byte)i;
}
Log("Construct blob by appending chunks...");
for (int i = 0; i < 50; i++)
{
await blob.WriteAsync(db, (tr, state) => state.AppendAsync(tr, data), this.Cancellation);
}
Log("Reading blob size:");
long?size = await blob.ReadAsync(db, (tr, state) => state.GetSizeAsync(tr), this.Cancellation);;
Log($"> {size:N0}");
Assert.That(size, Is.EqualTo(50 * data.Count));
Log("Reading blob content:");
var s = await blob.ReadAsync(db, (tr, state) => state.ReadAsync(tr, 1234567, 1_000_000), this.Cancellation);
Log($"> {s.Count:N0} bytes");
Assert.That(s.Count, Is.EqualTo(1_000_000));
// should contains the correct data
for (int i = 0; i < s.Count; i++)
{
if (s[i] != (byte)((1234567 + i) % data.Count))
{
Assert.Fail($"Corrupted blob chunk at {i}: {s[i, i + 128]}");
}
}
}
}