public void GetLinesTest()
{
MonitorTestSetUp();
const int numLines = 10;
var monitor = new TestMonitor(TestHelper.CreateOptions(), WriteToFile, new CancellationToken());
AddAFile(numLines);
Assert.AreEqual(2, AddedFiles.Count);
var lines = monitor.GetLinesPassThru(AddedFiles[1]).Result;
CheckLines(numLines, lines);
var cts = new CancellationTokenSource();
// lock the file on another task
Task.Run(() =>
{
using (File.Open(AddedFiles[1], FileMode.Open, FileAccess.ReadWrite))
{
}
},
cts.Token);
// task that waits for GetLines to return
var t = Task.Factory.StartNew(async() =>
{
lines = await monitor.GetLinesPassThru(AddedFiles[1]);
CheckLines(numLines, lines);
});
// sleep the test thread for a second just for fun
Thread.Sleep(1000);
// now cancel the file locking task and the GetLines should proceed
cts.Cancel(false);
t.Wait();
MonitorTestCleanUp();
}
