public async Task It_writes_parallel_console_writes_to_separate_buffers()
{
var writer = new MultiplexingTextWriter();
var barrier = new Barrier(10);
var outputs = await Task.WhenAll(Enumerable.Range(1, 10).Select(i =>
{
return(Task.Run(async() =>
{
using var _ = writer.EnsureInitializedForCurrentAsyncContext();
barrier.SignalAndWait();
writer.Write($"Hello from {i}");
writer.Write('\n');
await Task.Yield();
barrier.SignalAndWait();
await writer.WriteLineAsync($"Goodbye from {i}");
barrier.SignalAndWait();
return (i, text: writer.ToString());
}));
}));
foreach (var output in outputs)
{
output.text.Should().Be($"Hello from {output.i}\nGoodbye from {output.i}{NewLine}");
}
}
public void Disposal_of_inner_contexts_doe_not_dispose_writer()
{
var innerWriter = new TestWriter();
var writer = new MultiplexingTextWriter(() => innerWriter);
using var outer = writer.EnsureInitializedForCurrentAsyncContext();
writer.Write("outer");
var inner = writer.EnsureInitializedForCurrentAsyncContext();
writer.Write(inner);
inner.Dispose();
writer.Writers.Count().Should().Be(1);
innerWriter.Disposed.Should().BeFalse();
}
public void Write_operations_on_MultiplexingStringWriter_are_observable_and_produce_one_event_per_top_level_write_invocation(
Action <TextWriter> write,
string expectedValue)
{
var writer = new MultiplexingTextWriter();
using var _ = writer.EnsureInitializedForCurrentAsyncContext();
using var events = writer.GetObservable().ToSubscribedList();
write(writer);
events.Should()
.ContainSingle()
.Which
.Should()
.Be(expectedValue);
}
public void Initialization_per_context_is_idempotent()
{
var writer = new MultiplexingTextWriter(() => new TestWriter());
using var outer = writer.EnsureInitializedForCurrentAsyncContext();
writer.Write("hi!");
writer.Writers.Count().Should().Be(1);
using var inner = writer.EnsureInitializedForCurrentAsyncContext();
writer.Writers
.Should()
.ContainSingle()
.Which
.As <TestWriter>()
.Disposed
.Should()
.BeFalse();
}
