public void VirtualCanReadWrite_ShouldNotBeCalledDuringCtor()
{
using (var fs = File.Create(GetTestFilePath()))
using (var dfs = new DerivedFileStream(fs.SafeFileHandle, FileAccess.ReadWrite))
{
Assert.False(dfs.CanReadCalled);
Assert.False(dfs.CanWriteCalled);
Assert.False(dfs.CanSeekCalled);
}
}
public void CallSpanReadWriteOnDerivedFileStream_ArrayMethodsUsed()
{
using (var fs = new DerivedFileStream(GetTestFilePath(), FileMode.Create, FileAccess.ReadWrite, FileShare.None, bufferSize: 0x1000, FileOptions.None))
{
Assert.False(fs.WriteArrayInvoked);
Assert.False(fs.ReadArrayInvoked);
fs.Write(new ReadOnlySpan <byte>(new byte[1]));
Assert.True(fs.WriteArrayInvoked);
Assert.False(fs.ReadArrayInvoked);
fs.Position = 0;
fs.Read(new Span <byte>(new byte[1]));
Assert.True(fs.WriteArrayInvoked);
Assert.True(fs.ReadArrayInvoked);
}
}
public async Task CallMemoryReadWriteAsyncOnDerivedFileStream_ArrayMethodsUsed()
{
using (var fs = new DerivedFileStream(GetTestFilePath(), FileMode.Create, FileAccess.ReadWrite, FileShare.None, bufferSize: 0x1000, FileOptions.None))
{
Assert.False(fs.WriteAsyncArrayInvoked);
Assert.False(fs.ReadAsyncArrayInvoked);
await fs.WriteAsync(new ReadOnlyMemory <byte>(new byte[1]));
Assert.True(fs.WriteAsyncArrayInvoked);
Assert.False(fs.ReadAsyncArrayInvoked);
fs.Position = 0;
await fs.ReadAsync(new Memory <byte>(new byte[1]));
Assert.True(fs.WriteAsyncArrayInvoked);
Assert.True(fs.ReadAsyncArrayInvoked);
}
}