public async Task MultiChannels_SelectCanShareLambdas()
{
var c1 = new Channel <int>();
var c2 = new Channel <int>();
var c3 = new Channel <string>();
var sb = new StringBuilder();
var t1 = c1.Send(1); // don't wait for the sends to complete, they won't until later
var t2 = c2.Send(2);
var t3 = c3.Send("3");
// it frees up after the first time it's hit
await Go.Select(
Go.Case(new[] { c1, c2 }, i => sb.Append($"cx={i};")),
Go.Case(c3, i => sb.Append($"c3={i};")));
Assert.AreEqual("cx=1;", sb.ToString());
await Go.Select(
Go.Case(new[] { c1, c2 }, i => sb.Append($"cx={i};")),
Go.Case(c3, i => sb.Append($"c3={i};")));
Assert.AreEqual("cx=1;cx=2;", sb.ToString());
await Go.Select(
Go.Case(new[] { c1, c2 }, i => sb.Append($"cx={i};")),
Go.Case(c3, i => sb.Append($"c3={i};")));
Assert.AreEqual("cx=1;cx=2;c3=3;", sb.ToString());
}
public async Task MultiChannels_SelectPullsFromEachChannel()
{
var c1 = new Channel <int>();
var c2 = new Channel <int>();
var sb = new StringBuilder();
var t = Task.Run(async() => {
await c1.Send(1);
await c2.Send(2);
});
// it frees up after the first time it's hit
await Go.Select(
Go.Case(c1, i => sb.Append($"c1={i};")),
Go.Case(c2, i => sb.Append($"c2={i};")));
Assert.AreEqual("c1=1;", sb.ToString());
await Go.Select(
Go.Case(c1, i => sb.Append($"c1={i};")),
Go.Case(c2, i => sb.Append($"c2={i};")));
Assert.AreEqual("c1=1;c2=2;", sb.ToString());
}
public static async Task Run()
{
var results = new Channel <CrcResult>();
var errors = new Channel <Exception>();
var wg = new WaitGroup();
wg.Add(1);
Go.Run(async() => { // close the channels when the waitGroup signals
await wg.Wait();
results.Close();
errors.Close();
});
Go.Run(ScanDir, "/Users/orion/OneDrive/Ignite2015/dev/goroutines", results, errors, wg);
int totalFiles = 0;
while (results.IsOpen || errors.IsOpen)
{
await Go.Select(
Go.Case(results, r => {
Console.WriteLine($"Got {r.Value} for {r.Path}");
totalFiles++;
}),
Go.Case(errors, exception => {
Console.WriteLine($"EXCEPTION: {exception}");
totalFiles++;
}));
}
Console.WriteLine($"{totalFiles} total files");
}
public void SelectOnClosedChannelReturnsImmediatelyWithoutSignalling()
{
var ci = new Channel <int>(); ci.Close();
var hits = new List <int>();
Go.Select(
Go.Case(ci, hits.Add)).Wait(); // if the channel doesn't complete our unit test will hang and we'll find out the hard way
Assert.AreEqual(0, hits.Count);
}
public async Task SelectIgnoresNullChannels()
{
var ci = new Channel <int>();
var t1 = ci.Send(1);
var hits = new List <object>();
await Go.Select(
Go.Case(ci, i => hits.Add(i)),
Go.Case((Channel <string>)null, s => hits.Add(s)));
Assert.AreEqual(1, hits.Count);
Assert.AreEqual(1, hits[0]);
}
public void ClosingASelectedChannelCompletesItImmediatelySignallingChannelClosed()
{
var ci = new Channel <int>();
var hits = new List <Tuple <int, bool> >();
Go.Run(async() => {
await Task.Delay(25); // let the Receive begin
ci.Close();
});
Go.Select(
Go.Case(ci, (v, ok) => hits.Add(Tuple.Create(v, ok)))).Wait(); // if the channel doesn't complete our unit test will hang and we'll find out the hard way
CollectionAssert.AreEqual(new[] { Tuple.Create(0, false) }, hits);
}
public async Task MultiChannels_SelectDoesntLoseUnselectedValues()
{
var c1 = new Channel <int>();
var c2 = new Channel <int>();
var sb = new StringBuilder();
var t1 = c1.Send(1); // don't wait for the sends to complete, they won't until later
var t2 = c2.Send(2);
// it frees up after the first time it's hit
await Go.Select(
Go.Case(c1, i => sb.Append($"c1={i};")),
Go.Case(c2, i => sb.Append($"c2={i};")));
Assert.AreEqual("c1=1;", sb.ToString());
await Go.Select(
Go.Case(c1, i => sb.Append($"c1={i};")),
Go.Case(c2, i => sb.Append($"c2={i};")));
Assert.AreEqual("c1=1;c2=2;", sb.ToString());
}
public static async Task FanOutIn()
{
var numbers = new Channel <int>();
var letters = new Channel <char>();
Go.Run(async() => {
for (int i = 0; i < 10; i++)
{
await numbers.Send(i);
}
Console.WriteLine("numbers all sent");
numbers.Close();
});
Go.Run(async() => {
for (int i = 0; i < 10; i++)
{
await letters.Send((char)(i + 97));
}
Console.WriteLine("letters all sent");
letters.Close();
});
while (numbers.IsOpen || letters.IsOpen)
{
await Go.Select(
Go.Case(numbers, num => {
Console.WriteLine($"Got {num}");
}),
Go.Case(letters, ch => {
Console.WriteLine($"Got {ch}");
}));
}
}