public async Task FileBufferingReadStream_AsyncReadOverThreshold_CreatesFile() { var inner = MakeStream(1024 * 2); string tempFileName; using (var stream = new FileBufferingReadStream(inner, 1024, null, GetCurrentDirectory())) { var bytes = new byte[1000]; var read0 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(bytes.Length, read0); Assert.Equal(read0, stream.Length); Assert.Equal(read0, stream.Position); Assert.True(stream.InMemory); Assert.Null(stream.TempFileName); var read1 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(bytes.Length, read1); Assert.Equal(read0 + read1, stream.Length); Assert.Equal(read0 + read1, stream.Position); Assert.False(stream.InMemory); Assert.NotNull(stream.TempFileName); tempFileName = stream.TempFileName; Assert.True(File.Exists(tempFileName)); var read2 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(inner.Length - read0 - read1, read2); Assert.Equal(read0 + read1 + read2, stream.Length); Assert.Equal(read0 + read1 + read2, stream.Position); Assert.False(stream.InMemory); Assert.NotNull(stream.TempFileName); Assert.True(File.Exists(tempFileName)); var read3 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(0, read3); } Assert.False(File.Exists(tempFileName)); }
public async Task FileBufferingReadStream_AsyncReadWithInMemoryLimit_EnforcesLimit() { var inner = MakeStream(1024 * 2); using (var stream = new FileBufferingReadStream(inner, 1024, 900, Directory.GetCurrentDirectory())) { var bytes = new byte[500]; var read0 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(bytes.Length, read0); Assert.Equal(read0, stream.Length); Assert.Equal(read0, stream.Position); Assert.True(stream.InMemory); Assert.Null(stream.TempFileName); var exception = await Assert.ThrowsAsync <IOException>(() => stream.ReadAsync(bytes, 0, bytes.Length)); Assert.Equal("Buffer limit exceeded.", exception.Message); Assert.True(stream.InMemory); Assert.Null(stream.TempFileName); Assert.False(File.Exists(stream.TempFileName)); } }
public async Task FileBufferingReadStream_AsyncReadUnderThreshold_DoesntCreateFile() { var inner = MakeStream(1024 * 2); using (var stream = new FileBufferingReadStream(inner, 1024 * 3, null, Directory.GetCurrentDirectory())) { var bytes = new byte[1000]; var read0 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(bytes.Length, read0); Assert.Equal(read0, stream.Length); Assert.Equal(read0, stream.Position); Assert.True(stream.InMemory); Assert.Null(stream.TempFileName); var read1 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(bytes.Length, read1); Assert.Equal(read0 + read1, stream.Length); Assert.Equal(read0 + read1, stream.Position); Assert.True(stream.InMemory); Assert.Null(stream.TempFileName); var read2 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(inner.Length - read0 - read1, read2); Assert.Equal(read0 + read1 + read2, stream.Length); Assert.Equal(read0 + read1 + read2, stream.Position); Assert.True(stream.InMemory); Assert.Null(stream.TempFileName); var read3 = await stream.ReadAsync(bytes, 0, bytes.Length); Assert.Equal(0, read3); } }