public async Task CancellableStart_CanComplete()
{
var hostedService = new AsyncFakeHostedService();
var builder = CreateBuilder().ConfigureServices(services =>
{
services.AddSingleton <IHostedService>(hostedService);
});
using (var host = builder.Build())
{
var startTask = host.StartAsync();
// complete start task
hostedService.ContinueStart();
await startTask;
Assert.True(hostedService.IsStartCompleted);
}
}
public async Task CancellableStart_CancelledByCancellationToken()
{
var hostedService = new AsyncFakeHostedService();
var builder = CreateBuilder().ConfigureServices(services =>
{
services.AddSingleton <IHostedService>(hostedService);
});
using (var host = builder.Build())
{
var cts = new CancellationTokenSource();
var startTask = host.StartAsync(cts.Token);
// cancel token
cts.Cancel();
// complete start task
hostedService.ContinueStart();
await Assert.ThrowsAsync <OperationCanceledException>(() => startTask);
Assert.False(hostedService.IsStartCompleted);
}
}
public async Task CancellableStart_CancelledByApplicationLifetime()
{
var hostedService = new AsyncFakeHostedService();
var builder = CreateBuilder().ConfigureServices(services =>
{
services.AddSingleton <IHostedService>(hostedService);
});
using (var host = builder.Build())
{
var applicationLifetime = host.Services.GetService <IHostApplicationLifetime>();
var startTask = host.StartAsync();
// stop application
applicationLifetime.StopApplication();
// complete start task
hostedService.ContinueStart();
await Assert.ThrowsAsync <OperationCanceledException>(() => startTask);
Assert.False(hostedService.IsStartCompleted);
}
}