public async Task CancelsStartWhenAnyThrows()
{
var service1 = Substitute.For <IBackgroundService>();
service1.StartAsync(Arg.Any <CancellationToken>())
.Returns(
async ci =>
{
await Task.Delay(500);
ci.ArgAt <CancellationToken>(0)
.IsCancellationRequested.Should()
.BeTrue();
});
var service2 = Substitute.For <IBackgroundService>();
service2.StartAsync(Arg.Any <CancellationToken>())
.Throws(new InvalidOperationException());
var host = new BackgroundServiceHost(
new[] { service1, service2 },
Substitute.For <ILogger <BackgroundServiceHost> >());
await Assert.ThrowsAsync <InvalidOperationException>(
async() => await host.StartAsync(CancellationToken.None));
}
public async Task StartThrowsForAny()
{
var service1 = Substitute.For <IBackgroundService>();
service1.StartAsync(Arg.Any <CancellationToken>())
.Throws(new InvalidOperationException());
var service2 = Substitute.For <IBackgroundService>();
var host = new BackgroundServiceHost(
new[] { service1, service2 },
Substitute.For <ILogger <BackgroundServiceHost> >());
await Assert.ThrowsAsync <InvalidOperationException>(
async() => await host.StartAsync(CancellationToken.None));
}
public async Task StartsAll()
{
var service1 = Substitute.For <IBackgroundService>();
var service2 = Substitute.For <IBackgroundService>();
var host = new BackgroundServiceHost(
new[] { service1, service2 },
Substitute.For <ILogger <BackgroundServiceHost> >());
await host.StartAsync(CancellationToken.None);
await service1.Received(1)
.StartAsync(Arg.Any <CancellationToken>());
await service2.Received(1)
.StartAsync(Arg.Any <CancellationToken>());
}
public async Task StopsRunningWhenAnyThrows()
{
var service1 = Substitute.For <IBackgroundService>();
var service2 = Substitute.For <IBackgroundService>();
service2.StartAsync(Arg.Any <CancellationToken>())
.Returns(
async ci =>
{
await Task.Delay(500);
throw new InvalidOperationException();
});
var host = new BackgroundServiceHost(
new[] { service1, service2 },
Substitute.For <ILogger <BackgroundServiceHost> >());
await Assert.ThrowsAsync <InvalidOperationException>(
async() => await host.StartAsync(CancellationToken.None));
await service1.Received(1)
.StopAsync(Arg.Any <CancellationToken>());
}
