public async Task Refresh_ShouldNotRaiseEvents_WhenNothingChanged()
{
// ARRANGE
var driver = Substitute.For <IVpnEnumeratorDriver>();
driver.GetVpns().Returns(Task.FromResult(new[]
{
new Vpn("ID1", "VPN1"),
new Vpn("ID2", "VPN2"),
new Vpn("ID3", "VPN3"),
new Vpn("ID4", "VPN4")
}));
var sut = new VpnEnumerator(driver)
{
Vpns =
{
new Vpn("ID1", "VPN1"),
new Vpn("ID2", "VPN2"),
new Vpn("ID3", "VPN3"),
new Vpn("ID4", "VPN4")
}
};
using (var monitor = sut.Monitor())
{
// ACT
await sut.Refresh();
// ASSERT
monitor.Should().NotRaise(nameof(VpnEnumerator.Added));
monitor.Should().NotRaise(nameof(VpnEnumerator.Removed));
monitor.Should().NotRaise(nameof(VpnEnumerator.Error));
}
}
public async Task Refresh_ShouldRaiseErrorEvent_WhenDriverThrowsException()
{
// ARRANGE
var driver = Substitute.For <IVpnEnumeratorDriver>();
var exception = new Exception("IVpnEnumeratorDriver Exception");
driver.GetVpns().Throws(exception);
var sut = new VpnEnumerator(driver);
using (var monitor = sut.Monitor())
{
// ACT
await sut.Refresh();
// ASSERT
monitor.Should().Raise(nameof(VpnEnumerator.Error))
.WithSender(sut)
.WithArgs <ErrorEventArgs>(e => e.GetException().IsSameOrEqualTo(exception));
monitor.Should().NotRaise(nameof(VpnEnumerator.Added));
monitor.Should().NotRaise(nameof(VpnEnumerator.Removed));
}
}
public async Task Refresh_ShouldRaiseAddedAndRemovedEvents_WhenSomeVpnsAppearAndSomeDisappear()
{
// ARRANGE
var driver = Substitute.For <IVpnEnumeratorDriver>();
driver.GetVpns().Returns(Task.FromResult(new[]
{
new Vpn("ID3", "VPN3"),
new Vpn("ID4", "VPN4"),
new Vpn("ID5", "VPN5"),
new Vpn("ID6", "VPN6")
}));
var sut = new VpnEnumerator(driver)
{
Vpns =
{
new Vpn("ID1", "VPN1"),
new Vpn("ID2", "VPN2"),
new Vpn("ID3", "VPN3"),
new Vpn("ID4", "VPN4")
}
};
using (var monitor = sut.Monitor())
{
// ACT
await sut.Refresh();
// ASSERT
monitor.Should().Raise(nameof(VpnEnumerator.Added))
.WithSender(sut)
.WithArgs <VpnEventArgs>(e => e.Vpn.Id == "ID5" && e.Vpn.Name == "VPN5");
monitor.Should().Raise(nameof(VpnEnumerator.Added))
.WithSender(sut)
.WithArgs <VpnEventArgs>(e => e.Vpn.Id == "ID6" && e.Vpn.Name == "VPN6");
monitor.Should().Raise(nameof(VpnEnumerator.Removed))
.WithSender(sut)
.WithArgs <VpnEventArgs>(e => e.Vpn.Id == "ID1" && e.Vpn.Name == "VPN1");
monitor.Should().Raise(nameof(VpnEnumerator.Removed))
.WithSender(sut)
.WithArgs <VpnEventArgs>(e => e.Vpn.Id == "ID2" && e.Vpn.Name == "VPN2");
monitor.Should().NotRaise(nameof(VpnEnumerator.Error));
}
}
public async Task Refresh_ShouldRaiseErrorEvent_WhenDriverReturnsNull()
{
// ARRANGE
var driver = Substitute.For <IVpnEnumeratorDriver>();
driver.GetVpns().Returns(Task.FromResult <Vpn[]>(null));
var sut = new VpnEnumerator(driver);
using (var monitor = sut.Monitor())
{
// ACT
await sut.Refresh();
// ASSERT
monitor.Should().Raise(nameof(VpnEnumerator.Error))
.WithSender(sut);
monitor.Should().NotRaise(nameof(VpnEnumerator.Added));
monitor.Should().NotRaise(nameof(VpnEnumerator.Removed));
}
}